AMOLED dark theme is now available.

31 files changed, 332 insertions, 1053 deletions

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountPostsActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountPostsActivity.java
index 2580339a..a60975a5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountPostsActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountPostsActivity.java
@@ -13,8 +13,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
@@ -30,10 +28,8 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.UserThingSortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.FragmentCommunicator;
@@ -41,15 +37,8 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class AccountPostsActivity extends AppCompatActivity implements UserThingSortTypeBottomSheetFragment.UserThingSortTypeSelectionCallback {
+public class AccountPostsActivity extends BaseActivity implements UserThingSortTypeBottomSheetFragment.UserThingSortTypeSelectionCallback {
 
     static final String EXTRA_USER_WHERE = "EUW";
 
@@ -80,18 +69,9 @@ public class AccountPostsActivity extends AppCompatActivity implements UserThing
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_account_posts);
 
@@ -140,24 +120,6 @@ public class AccountPostsActivity extends AppCompatActivity implements UserThing
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         mUserWhere = getIntent().getExtras().getString(EXTRA_USER_WHERE);
         if (mUserWhere.equals(PostDataSource.USER_WHERE_UPVOTED)) {
             toolbar.setTitle(R.string.upvoted);
@@ -190,6 +152,11 @@ public class AccountPostsActivity extends AppCompatActivity implements UserThing
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeFragment() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountSavedThingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountSavedThingActivity.java
index 33f22e03..bfb90405 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountSavedThingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountSavedThingActivity.java
@@ -13,8 +13,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
@@ -35,10 +33,8 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.CommentsListingFragment;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.FragmentCommunicator;
@@ -46,16 +42,9 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class AccountSavedThingActivity extends AppCompatActivity {
+public class AccountSavedThingActivity extends BaseActivity {
 
     private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
     private static final String ACCESS_TOKEN_STATE = "ATS";
@@ -89,18 +78,9 @@ public class AccountSavedThingActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_account_saved_thing);
 
@@ -149,24 +129,6 @@ public class AccountSavedThingActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -187,6 +149,11 @@ public class AccountSavedThingActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeViewPager() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/BaseActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/BaseActivity.java
new file mode 100644
index 00000000..f887e7f1
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/BaseActivity.java
@@ -0,0 +1,86 @@
+package ml.docilealligator.infinityforreddit.Activity;
+
+import android.content.SharedPreferences;
+import android.content.res.Configuration;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.Window;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
+
+import ml.docilealligator.infinityforreddit.ContentFontStyle;
+import ml.docilealligator.infinityforreddit.FontStyle;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
+import ml.docilealligator.infinityforreddit.TitleFontStyle;
+
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
+
+public abstract class BaseActivity extends AppCompatActivity {
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        SharedPreferences mSharedPreferences = getSharedPreferences();
+        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
+        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
+        switch (themeType) {
+            case 0:
+                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
+                getTheme().applyStyle(R.style.Theme_Default, true);
+                break;
+            case 1:
+                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
+                if(mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
+                    getTheme().applyStyle(R.style.Theme_Default_AmoledDark, true);
+                } else {
+                    getTheme().applyStyle(R.style.Theme_Default_NormalDark, true);
+                }
+                break;
+            case 2:
+                if (systemDefault) {
+                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
+                } else {
+                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
+                }
+                if((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_NO) {
+                    getTheme().applyStyle(R.style.Theme_Default, true);
+                } else {
+                    if(mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
+                        getTheme().applyStyle(R.style.Theme_Default_AmoledDark, true);
+                    } else {
+                        getTheme().applyStyle(R.style.Theme_Default_NormalDark, true);
+                    }
+                }
+        }
+
+        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
+                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
+
+        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
+                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
+
+        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
+                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            Window window = getWindow();
+            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+            }
+            TypedValue typedValue = new TypedValue();
+            getTheme().resolveAttribute(R.attr.navBarColor, typedValue, true);
+            int navBarColor = typedValue.data;
+            window.setNavigationBarColor(navBarColor);
+        }
+    }
+
+    public abstract SharedPreferences getSharedPreferences();
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CommentActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CommentActivity.java
index d17d746c..3917a50e 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CommentActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CommentActivity.java
@@ -3,15 +3,11 @@ package ml.docilealligator.infinityforreddit.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
 import android.text.util.Linkify;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
-import android.view.Window;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.TextView;
@@ -19,11 +15,8 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.google.android.material.snackbar.Snackbar;
 
@@ -41,23 +34,14 @@ import io.noties.markwon.MarkwonConfiguration;
 import io.noties.markwon.linkify.LinkifyPlugin;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.CommentData;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SendComment;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class CommentActivity extends AppCompatActivity {
+public class CommentActivity extends BaseActivity {
 
     public static final String EXTRA_COMMENT_PARENT_TEXT_KEY = "ECPTK";
     public static final String EXTRA_PARENT_FULLNAME_KEY = "EPFK";
@@ -94,18 +78,9 @@ public class CommentActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_comment);
 
@@ -113,32 +88,6 @@ public class CommentActivity extends AppCompatActivity {
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         if (savedInstanceState == null) {
             getCurrentAccount();
         } else {
@@ -186,6 +135,11 @@ public class CommentActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccount() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditCommentActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditCommentActivity.java
index 1c7a7715..a1aa24dd 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditCommentActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditCommentActivity.java
@@ -3,23 +3,16 @@ package ml.docilealligator.infinityforreddit.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
-import android.view.Window;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.google.android.material.snackbar.Snackbar;
 
@@ -34,26 +27,17 @@ import javax.inject.Named;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditAPI;
 import ml.docilealligator.infinityforreddit.RedditUtils;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class EditCommentActivity extends AppCompatActivity {
+public class EditCommentActivity extends BaseActivity {
 
     public static final String EXTRA_CONTENT = "EC";
     public static final String EXTRA_FULLNAME = "EF";
@@ -80,18 +64,9 @@ public class EditCommentActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_edit_comment);
 
@@ -99,38 +74,12 @@ public class EditCommentActivity extends AppCompatActivity {
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
-        mFullName = getIntent().getExtras().getString(EXTRA_FULLNAME);
-        mAccessToken = getIntent().getExtras().getString(EXTRA_ACCESS_TOKEN);
-        contentEditText.setText(getIntent().getExtras().getString(EXTRA_CONTENT));
+        mFullName = getIntent().getStringExtra(EXTRA_FULLNAME);
+        mAccessToken = getIntent().getStringExtra(EXTRA_ACCESS_TOKEN);
+        contentEditText.setText(getIntent().getStringExtra(EXTRA_CONTENT));
 
         contentEditText.requestFocus();
         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
@@ -140,6 +89,11 @@ public class EditCommentActivity extends AppCompatActivity {
     }
 
     @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
+    @Override
     protected void onPause() {
         super.onPause();
         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditPostActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditPostActivity.java
index 2e4696fd..535124c0 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditPostActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditPostActivity.java
@@ -3,24 +3,17 @@ package ml.docilealligator.infinityforreddit.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
-import android.view.Window;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.google.android.material.snackbar.Snackbar;
 
@@ -35,26 +28,17 @@ import javax.inject.Named;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditAPI;
 import ml.docilealligator.infinityforreddit.RedditUtils;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class EditPostActivity extends AppCompatActivity {
+public class EditPostActivity extends BaseActivity {
 
     static final String EXTRA_TITLE = "ET";
     static final String EXTRA_CONTENT = "EC";
@@ -80,18 +64,9 @@ public class EditPostActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_edit_post);
 
@@ -99,39 +74,13 @@ public class EditPostActivity extends AppCompatActivity {
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
-        mFullName = getIntent().getExtras().getString(EXTRA_FULLNAME);
-        mAccessToken = getIntent().getExtras().getString(EXTRA_ACCESS_TOKEN);
-        titleTextView.setText(getIntent().getExtras().getString(EXTRA_TITLE));
-        contentEditText.setText(getIntent().getExtras().getString(EXTRA_CONTENT));
+        mFullName = getIntent().getStringExtra(EXTRA_FULLNAME);
+        mAccessToken = getIntent().getStringExtra(EXTRA_ACCESS_TOKEN);
+        titleTextView.setText(getIntent().getStringExtra(EXTRA_TITLE));
+        contentEditText.setText(getIntent().getStringExtra(EXTRA_CONTENT));
 
         contentEditText.requestFocus();
         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
@@ -141,6 +90,11 @@ public class EditPostActivity extends AppCompatActivity {
     }
 
     @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
+    @Override
     protected void onPause() {
         super.onPause();
         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/FilteredThingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/FilteredThingActivity.java
index cb421d00..4206c08c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/FilteredThingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/FilteredThingActivity.java
@@ -13,8 +13,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
@@ -30,9 +28,7 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SearchPostSortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SortTypeBottomSheetFragment;
@@ -43,15 +39,8 @@ import ml.docilealligator.infinityforreddit.Post;
 import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class FilteredThingActivity extends AppCompatActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
+public class FilteredThingActivity extends BaseActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
         SearchPostSortTypeBottomSheetFragment.SearchSortTypeSelectionCallback, UserThingSortTypeBottomSheetFragment.UserThingSortTypeSelectionCallback {
 
     public static final String EXTRA_NAME = "ESN";
@@ -92,18 +81,9 @@ public class FilteredThingActivity extends AppCompatActivity implements SortType
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_filtered_thing);
 
@@ -152,24 +132,6 @@ public class FilteredThingActivity extends AppCompatActivity implements SortType
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -196,6 +158,11 @@ public class FilteredThingActivity extends AppCompatActivity implements SortType
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndBindView(int filter, String sortType) {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/LoginActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/LoginActivity.java
index b50ed2e1..c5314d56 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/LoginActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/LoginActivity.java
@@ -5,7 +5,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.webkit.CookieManager;
@@ -14,8 +13,6 @@ import android.webkit.WebViewClient;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 
 import org.json.JSONException;
@@ -37,18 +34,12 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditAPI;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.RedditUtils;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class LoginActivity extends AppCompatActivity {
+public class LoginActivity extends BaseActivity {
 
     @BindView(R.id.toolbar_login_activity)
     Toolbar toolbar;
@@ -66,33 +57,15 @@ public class LoginActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
+        ((Infinity) getApplication()).getAppComponent().inject(this);
+
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
 
         ButterKnife.bind(this);
 
-        ((Infinity) getApplication()).getAppComponent().inject(this);
-
         setSupportActionBar(toolbar);
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
         WebView webView = findViewById(R.id.webview_login_activity);
@@ -219,6 +192,11 @@ public class LoginActivity extends AppCompatActivity {
     }
 
     @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
+    @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         if (item.getItemId() == android.R.id.home) {
             finish();
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MainActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MainActivity.java
index 457fef5b..48687a42 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MainActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MainActivity.java
@@ -20,8 +20,6 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.view.GravityCompat;
@@ -68,13 +66,11 @@ import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertSubscribedThingsAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchToAnonymousAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
-import ml.docilealligator.infinityforreddit.Event.ChangeFontSizeEvent;
+import ml.docilealligator.infinityforreddit.Event.RecreateActivityEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchMyInfo;
 import ml.docilealligator.infinityforreddit.FetchSubscribedThing;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.PostTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SortTypeBottomSheetFragment;
@@ -90,16 +86,10 @@ import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserData;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class MainActivity extends AppCompatActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
+public class MainActivity extends BaseActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
         PostTypeBottomSheetFragment.PostTypeSelectionCallback {
 
     static final String EXTRA_POST_TYPE = "EPT";
@@ -202,20 +192,11 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        setTheme(R.style.AppTheme_NoActionBarWithTransparentStatusBar);
-
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
+        setTheme(R.style.AppTheme_NoActionBarWithTransparentStatusBar);
 
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_main);
 
@@ -273,24 +254,6 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         postTypeBottomSheetFragment = new PostTypeBottomSheetFragment();
 
         bestSortTypeBottomSheetFragment = new SortTypeBottomSheetFragment();
@@ -348,6 +311,11 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndBindView() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             boolean enableNotification = mSharedPreferences.getBoolean(SharedPreferencesUtils.ENABLE_NOTIFICATION_KEY, true);
@@ -944,7 +912,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
     }
 
     @Subscribe
-    public void onChangeFontSizeEvent(ChangeFontSizeEvent changeFontSizeEvent) {
+    public void onRecreateActivityEvent(RecreateActivityEvent recreateActivityEvent) {
         recreate();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostImageActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostImageActivity.java
index cf0a1996..a9b138bb 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostImageActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostImageActivity.java
@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit.Activity;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -11,7 +10,6 @@ import android.provider.MediaStore;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.Window;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ImageView;
@@ -19,12 +17,9 @@ import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 import androidx.core.content.FileProvider;
 
 import com.bumptech.glide.Glide;
@@ -49,27 +44,18 @@ import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.LoadSubredditIconAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SubmitImagePostEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.Flair;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FlairBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubmitPostService;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class PostImageActivity extends AppCompatActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
+public class PostImageActivity extends BaseActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
 
@@ -152,18 +138,9 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_post_image);
 
@@ -171,32 +148,6 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -367,6 +318,11 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccount() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostLinkActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostLinkActivity.java
index 962d4492..2c8f33b5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostLinkActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostLinkActivity.java
@@ -2,24 +2,18 @@ package ml.docilealligator.infinityforreddit.Activity;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.Window;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
@@ -39,28 +33,19 @@ import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.LoadSubredditIconAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SubmitTextOrLinkPostEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.Flair;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FlairBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.RedditUtils;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubmitPostService;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class PostLinkActivity extends AppCompatActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
+public class PostLinkActivity extends BaseActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
     static final String EXTRA_LINK = "EL";
@@ -127,18 +112,9 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_post_link);
 
@@ -146,32 +122,6 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -306,6 +256,11 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccount() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostTextActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostTextActivity.java
index c028e1c4..7c034945 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostTextActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostTextActivity.java
@@ -2,24 +2,18 @@ package ml.docilealligator.infinityforreddit.Activity;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.Window;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
@@ -39,28 +33,19 @@ import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.LoadSubredditIconAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SubmitTextOrLinkPostEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.Flair;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FlairBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.RedditUtils;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubmitPostService;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class PostTextActivity extends AppCompatActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
+public class PostTextActivity extends BaseActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
     static final String EXTRA_CONTENT = "EC";
@@ -127,18 +112,9 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_post_text);
 
@@ -146,32 +122,6 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -310,6 +260,11 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccount() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostVideoActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostVideoActivity.java
index 9f9ae47d..68345423 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostVideoActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostVideoActivity.java
@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit.Activity;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -10,19 +9,15 @@ import android.provider.MediaStore;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.Window;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.core.content.ContextCompat;
 
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
@@ -51,27 +46,18 @@ import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.LoadSubredditIconAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SubmitVideoPostEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.Flair;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FlairBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubmitPostService;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class PostVideoActivity extends AppCompatActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
+public class PostVideoActivity extends BaseActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
 
@@ -160,18 +146,9 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_post_video);
 
@@ -179,32 +156,6 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -372,6 +323,11 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccount() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/RulesActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/RulesActivity.java
index f56feeee..aa5a5af2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/RulesActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/RulesActivity.java
@@ -15,8 +15,6 @@ import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -38,28 +36,19 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.Adapter.RulesRecyclerViewAdapter;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.JSONUtils;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditAPI;
 import ml.docilealligator.infinityforreddit.Rule;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.Utils;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class RulesActivity extends AppCompatActivity {
+public class RulesActivity extends BaseActivity {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
 
@@ -83,18 +72,9 @@ public class RulesActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_rules);
 
@@ -150,24 +130,6 @@ public class RulesActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -180,6 +142,11 @@ public class RulesActivity extends AppCompatActivity {
         fetchRules();
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void fetchRules() {
         progressBar.setVisibility(View.VISIBLE);
         errorTextView.setVisibility(View.GONE);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchActivity.java
index 8bcff74f..580b7d49 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchActivity.java
@@ -4,23 +4,17 @@ import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.Window;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
-import androidx.core.content.ContextCompat;
 
 import com.ferfalk.simplesearchview.SimpleSearchView;
 
@@ -31,20 +25,11 @@ import javax.inject.Inject;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SearchActivity extends AppCompatActivity {
+public class SearchActivity extends BaseActivity {
 
     static final String EXTRA_QUERY = "EQ";
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
@@ -75,18 +60,9 @@ public class SearchActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_search);
 
@@ -94,35 +70,9 @@ public class SearchActivity extends AppCompatActivity {
 
         EventBus.getDefault().register(this);
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            Window window = getWindow();
-            if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-                window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
-            }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
 
-        boolean searchOnlySubreddits = getIntent().getExtras().getBoolean(EXTRA_SEARCH_ONLY_SUBREDDITS);
+        boolean searchOnlySubreddits = getIntent().getBooleanExtra(EXTRA_SEARCH_ONLY_SUBREDDITS, false);
 
         simpleSearchView.setOnSearchViewListener(new SimpleSearchView.SearchViewListener() {
             @Override
@@ -212,6 +162,11 @@ public class SearchActivity extends AppCompatActivity {
     }
 
     @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
+    @Override
     protected void onStart() {
         super.onStart();
         simpleSearchView.showSearch(false);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchResultActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchResultActivity.java
index cbdb8e87..49f565ec 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchResultActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchResultActivity.java
@@ -14,8 +14,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
@@ -34,10 +32,8 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SearchPostSortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SearchUserAndSubredditSortTypeBottomSheetFragment;
@@ -48,15 +44,8 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SearchResultActivity extends AppCompatActivity implements SearchPostSortTypeBottomSheetFragment.SearchSortTypeSelectionCallback,
+public class SearchResultActivity extends BaseActivity implements SearchPostSortTypeBottomSheetFragment.SearchSortTypeSelectionCallback,
         SearchUserAndSubredditSortTypeBottomSheetFragment.SearchUserAndSubredditSortTypeSelectionCallback {
     static final String EXTRA_QUERY = "QK";
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
@@ -87,18 +76,9 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_search_result);
 
@@ -144,24 +124,6 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -196,6 +158,11 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeViewPager() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchSubredditsResultActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchSubredditsResultActivity.java
index 52d644b2..eff35025 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchSubredditsResultActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchSubredditsResultActivity.java
@@ -14,8 +14,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
@@ -30,22 +28,13 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.SubredditListingFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SearchSubredditsResultActivity extends AppCompatActivity {
+public class SearchSubredditsResultActivity extends BaseActivity {
 
     static final String EXTRA_QUERY = "EQ";
     static final String EXTRA_RETURN_SUBREDDIT_NAME = "ERSN";
@@ -71,18 +60,9 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_search_subreddits_result);
 
@@ -128,24 +108,6 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -166,6 +128,11 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeFragment(String query) {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SettingsActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SettingsActivity.java
index a01c45be..106ba653 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SettingsActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SettingsActivity.java
@@ -4,15 +4,13 @@ import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.Build;
 import android.os.Bundle;
+import android.util.TypedValue;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.Window;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
-import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
@@ -21,21 +19,12 @@ import javax.inject.Inject;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.Settings.AboutPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.MainPreferenceFragment;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SettingsActivity extends AppCompatActivity implements
+public class SettingsActivity extends BaseActivity implements
         PreferenceFragmentCompat.OnPreferenceStartFragmentCallback {
 
     private static final String TITLE_STATE = "TS";
@@ -48,20 +37,11 @@ public class SettingsActivity extends AppCompatActivity implements
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.settings_activity);
+        setContentView(R.layout.activity_settings);
 
         ButterKnife.bind(this);
 
@@ -70,25 +50,10 @@ public class SettingsActivity extends AppCompatActivity implements
             if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
                 window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
             }
-            window.setNavigationBarColor(ContextCompat.getColor(this, R.color.navBarColor));
-        }
-
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
+            TypedValue typedValue = new TypedValue();
+            getTheme().resolveAttribute(R.attr.navBarColor, typedValue, true);
+            int navBarColor = typedValue.data;
+            window.setNavigationBarColor(navBarColor);
         }
 
         setSupportActionBar(toolbar);
@@ -108,8 +73,11 @@ public class SettingsActivity extends AppCompatActivity implements
                 setTitle(R.string.settings_about_master_title);
             }
         });
+    }
 
-
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
     }
 
     @Override
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditSelectionActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditSelectionActivity.java
index c08ef974..de79b647 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditSelectionActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditSelectionActivity.java
@@ -16,8 +16,6 @@ import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
@@ -36,27 +34,18 @@ import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertSubscribedThingsAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchSubscribedThing;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.SubscribedSubredditsListingFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserData;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SubredditSelectionActivity extends AppCompatActivity {
+public class SubredditSelectionActivity extends BaseActivity {
 
     static final String EXTRA_EXTRA_CLEAR_SELECTION = "EECS";
     static final String EXTRA_RETURN_SUBREDDIT_NAME = "ERSN";
@@ -91,18 +80,9 @@ public class SubredditSelectionActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_subreddit_selection);
 
@@ -151,24 +131,6 @@ public class SubredditSelectionActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -190,6 +152,11 @@ public class SubredditSelectionActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndBindView() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubscribedThingListingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubscribedThingListingActivity.java
index 14e6be20..5152bed5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubscribedThingListingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubscribedThingListingActivity.java
@@ -12,8 +12,6 @@ import android.view.Window;
 import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
@@ -36,28 +34,19 @@ import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertSubscribedThingsAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchSubscribedThing;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FollowedUsersListingFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SubscribedSubredditsListingFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserData;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class SubscribedThingListingActivity extends AppCompatActivity {
+public class SubscribedThingListingActivity extends BaseActivity {
 
     private static final String INSERT_SUBSCRIBED_SUBREDDIT_STATE = "ISSS";
     private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
@@ -87,18 +76,9 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_subscribed_thing_listing);
 
@@ -147,24 +127,6 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
@@ -183,6 +145,11 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeViewPager() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (account == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMessageActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMessageActivity.java
index 8bd4426d..474ebbc7 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMessageActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMessageActivity.java
@@ -17,8 +17,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.DividerItemDecoration;
@@ -43,25 +41,16 @@ import ml.docilealligator.infinityforreddit.Adapter.MessageRecyclerViewAdapter;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchMessages;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.MessageViewModel;
 import ml.docilealligator.infinityforreddit.NetworkState;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class ViewMessageActivity extends AppCompatActivity {
+public class ViewMessageActivity extends BaseActivity {
 
     public static final String EXTRA_NEW_ACCOUNT_NAME = "ENAN";
 
@@ -101,18 +90,9 @@ public class ViewMessageActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_view_message);
 
@@ -168,24 +148,6 @@ public class ViewMessageActivity extends AppCompatActivity {
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         toolbar.setTitle(R.string.inbox);
         setSupportActionBar(toolbar);
 
@@ -205,6 +167,11 @@ public class ViewMessageActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndFetchMessage() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (mNewAccountName != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
index b75ae282..b2afe3d2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
@@ -20,8 +20,6 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.recyclerview.widget.LinearLayoutManager;
@@ -53,7 +51,6 @@ import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.CommentData;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.DeleteThing;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWBlurEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeSpoilerBlurEvent;
@@ -63,7 +60,6 @@ import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchComment;
 import ml.docilealligator.infinityforreddit.FetchPost;
 import ml.docilealligator.infinityforreddit.Flair;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.FlairBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.HidePost;
 import ml.docilealligator.infinityforreddit.Infinity;
@@ -77,20 +73,15 @@ import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.RedditUtils;
 import ml.docilealligator.infinityforreddit.SaveThing;
 import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
 import static ml.docilealligator.infinityforreddit.Activity.CommentActivity.EXTRA_COMMENT_DATA_KEY;
 import static ml.docilealligator.infinityforreddit.Activity.CommentActivity.WRITE_COMMENT_REQUEST_CODE;
 
-public class ViewPostDetailActivity extends AppCompatActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
+public class ViewPostDetailActivity extends BaseActivity implements FlairBottomSheetFragment.FlairSelectionCallback {
 
     public static final String EXTRA_POST_DATA = "EPD";
     public static final String EXTRA_POST_LIST_POSITION = "EPLI";
@@ -168,18 +159,9 @@ public class ViewPostDetailActivity extends AppCompatActivity implements FlairBo
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_view_post_detail);
 
@@ -236,24 +218,6 @@ public class ViewPostDetailActivity extends AppCompatActivity implements FlairBo
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         toolbar.setTitle("");
         setSupportActionBar(toolbar);
 
@@ -288,6 +252,11 @@ public class ViewPostDetailActivity extends AppCompatActivity implements FlairBo
         }
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndBindView() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (mNewAccountName != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewSubredditDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewSubredditDetailActivity.java
index b70966a6..89726f06 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewSubredditDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewSubredditDetailActivity.java
@@ -17,8 +17,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
@@ -46,11 +44,9 @@ import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.CheckIsSubscribedToSubredditAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchSubredditData;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.PostTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SortTypeBottomSheetFragment;
@@ -60,21 +56,14 @@ import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.ReadMessage;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditDao;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditViewModel;
 import ml.docilealligator.infinityforreddit.SubredditSubscription;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class ViewSubredditDetailActivity extends AppCompatActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
+public class ViewSubredditDetailActivity extends BaseActivity implements SortTypeBottomSheetFragment.SortTypeSelectionCallback,
         PostTypeBottomSheetFragment.PostTypeSelectionCallback {
 
     public static final String EXTRA_SUBREDDIT_NAME_KEY = "ESN";
@@ -146,18 +135,9 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_view_subreddit_detail);
 
@@ -205,24 +185,6 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
             }
         }
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         subredditName = getIntent().getStringExtra(EXTRA_SUBREDDIT_NAME_KEY);
 
         if (savedInstanceState == null) {
@@ -349,6 +311,11 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
         });
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndBindView() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (mNewAccountName != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewUserDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewUserDetailActivity.java
index f5c54130..e67bdd6f 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewUserDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewUserDetailActivity.java
@@ -7,6 +7,7 @@ import android.content.res.Resources;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
+import android.util.TypedValue;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -17,8 +18,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
@@ -50,12 +49,10 @@ import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
 import ml.docilealligator.infinityforreddit.AsyncTask.CheckIsFollowingUserAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.DeleteThing;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchUserData;
-import ml.docilealligator.infinityforreddit.FontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.CommentsListingFragment;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.Fragment.UserThingSortTypeBottomSheetFragment;
@@ -65,9 +62,7 @@ import ml.docilealligator.infinityforreddit.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.ReadMessage;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
-import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserDao;
-import ml.docilealligator.infinityforreddit.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.User.UserDao;
 import ml.docilealligator.infinityforreddit.User.UserData;
 import ml.docilealligator.infinityforreddit.User.UserViewModel;
@@ -75,12 +70,7 @@ import ml.docilealligator.infinityforreddit.UserFollowing;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
-public class ViewUserDetailActivity extends AppCompatActivity implements UserThingSortTypeBottomSheetFragment.UserThingSortTypeSelectionCallback {
+public class ViewUserDetailActivity extends BaseActivity implements UserThingSortTypeBottomSheetFragment.UserThingSortTypeSelectionCallback {
 
     public static final String EXTRA_USER_NAME_KEY = "EUNK";
     public static final String EXTRA_MESSAGE_FULLNAME = "ENF";
@@ -150,18 +140,9 @@ public class ViewUserDetailActivity extends AppCompatActivity implements UserThi
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        getTheme().applyStyle(FontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.FONT_SIZE_KEY, FontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(TitleFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.TITLE_FONT_SIZE_KEY, TitleFontStyle.Normal.name())).getResId(), true);
-
-        getTheme().applyStyle(ContentFontStyle.valueOf(mSharedPreferences
-                .getString(SharedPreferencesUtils.CONTENT_FONT_SIZE_KEY, ContentFontStyle.Normal.name())).getResId(), true);
+        super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_view_user_detail);
 
@@ -169,24 +150,6 @@ public class ViewUserDetailActivity extends AppCompatActivity implements UserThi
 
         EventBus.getDefault().register(this);
 
-        boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
-        int themeType = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.THEME_KEY, "2"));
-        switch (themeType) {
-            case 0:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_NO);
-                break;
-            case 1:
-                AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                break;
-            case 2:
-                if (systemDefault) {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_FOLLOW_SYSTEM);
-                } else {
-                    AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
-                }
-
-        }
-
         username = getIntent().getStringExtra(EXTRA_USER_NAME_KEY);
 
         if (savedInstanceState == null) {
@@ -234,13 +197,19 @@ public class ViewUserDetailActivity extends AppCompatActivity implements UserThi
         setSupportActionBar(toolbar);
 
         expandedTabTextColor = resources.getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTextColor);
-        expandedTabBackgroundColor = resources.getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTabBackground);
         expandedTabIndicatorColor = resources.getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTabIndicator);
 
+        TypedValue expandedTabBackgroundColorTypedValue = new TypedValue();
+        getTheme().resolveAttribute(R.attr.tabLayoutWithExpandedCollapsingToolbarTabBackground, expandedTabBackgroundColorTypedValue, true);
+        expandedTabBackgroundColor = expandedTabBackgroundColorTypedValue.data;
+
         collapsedTabTextColor = resources.getColor(R.color.tabLayoutWithCollapsedCollapsingToolbarTextColor);
-        collapsedTabBackgroundColor = resources.getColor(R.color.tabLayoutWithCollapsedCollapsingToolbarTabBackground);
         collapsedTabIndicatorColor = resources.getColor(R.color.tabLayoutWithCollapsedCollapsingToolbarTabIndicator);
 
+        TypedValue collapsedTabBackgroundColorTypedValue = new TypedValue();
+        getTheme().resolveAttribute(R.attr.tabLayoutWithCollapsedCollapsingToolbarTabBackground, collapsedTabBackgroundColorTypedValue, true);
+        collapsedTabBackgroundColor = collapsedTabBackgroundColorTypedValue.data;
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1
                 && (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT
                 || resources.getBoolean(R.bool.isTablet))) {
@@ -418,6 +387,11 @@ public class ViewUserDetailActivity extends AppCompatActivity implements UserThi
         userThingSortTypeBottomSheetFragment = new UserThingSortTypeBottomSheetFragment();
     }
 
+    @Override
+    public SharedPreferences getSharedPreferences() {
+        return mSharedPreferences;
+    }
+
     private void getCurrentAccountAndInitializeViewPager() {
         new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
             if (mNewAccountName != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
index 1cc56f23..11b68da8 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
@@ -9,6 +9,7 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.util.Linkify;
+import android.util.TypedValue;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -106,6 +107,7 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
     private boolean isInitiallyLoadingFailed;
     private boolean mHasMoreComments;
     private boolean loadMoreCommentsFailed;
+    private int mCommentBackgroundColor;
 
     public CommentAndPostRecyclerViewAdapter(Activity activity, Retrofit retrofit, Retrofit oauthRetrofit,
                                              RedditDataRoomDatabase redditDataRoomDatabase, RequestManager glide,
@@ -152,6 +154,10 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         isInitiallyLoadingFailed = false;
         mHasMoreComments = false;
         loadMoreCommentsFailed = false;
+
+        TypedValue typedValue = new TypedValue();
+        mActivity.getTheme().resolveAttribute(R.attr.cardViewBackgroundColor, typedValue, true);
+        mCommentBackgroundColor = typedValue.data;
     }
 
     @Override
@@ -1204,8 +1210,7 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
             params.width = 0;
             ((CommentViewHolder) holder).verticalBlock.setLayoutParams(params);
             ((CommentViewHolder) holder).itemView.setPadding(0, 0, 0, 0);
-            ((CommentViewHolder) holder).itemView.setBackgroundColor(
-                    mActivity.getResources().getColor(R.color.cardViewBackgroundColor));
+            ((CommentViewHolder) holder).itemView.setBackgroundColor(mCommentBackgroundColor);
         } else if (holder instanceof PostDetailViewHolder) {
             ((PostDetailViewHolder) holder).mUpvoteButton.clearColorFilter();
             ((PostDetailViewHolder) holder).mScoreTextView.setTextColor(ContextCompat.getColor(mActivity, R.color.defaultTextColor));
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/MessageRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/MessageRecyclerViewAdapter.java
index c8904642..3770ad58 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/MessageRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/MessageRecyclerViewAdapter.java
@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.content.res.Resources;
 import android.net.Uri;
 import android.text.util.Linkify;
+import android.util.TypedValue;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -53,6 +54,7 @@ public class MessageRecyclerViewAdapter extends PagedListAdapter<Message, Recycl
     private Resources mResources;
     private NetworkState networkState;
     private RetryLoadingMoreCallback mRetryLoadingMoreCallback;
+    private int mMessageBackgroundColor;
 
     public MessageRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, String accessToken,
                                       RetryLoadingMoreCallback retryLoadingMoreCallback) {
@@ -81,6 +83,10 @@ public class MessageRecyclerViewAdapter extends PagedListAdapter<Message, Recycl
                 .build();
         mAccessToken = accessToken;
         mResources = context.getResources();
+
+        TypedValue typedValue = new TypedValue();
+        mContext.getTheme().resolveAttribute(R.attr.cardViewBackgroundColor, typedValue, true);
+        mMessageBackgroundColor = typedValue.data;
     }
 
     @NonNull
@@ -126,7 +132,7 @@ public class MessageRecyclerViewAdapter extends PagedListAdapter<Message, Recycl
                     }
 
                     if (message.isNew()) {
-                        ((DataViewHolder) holder).itemView.setBackgroundColor(mResources.getColor(R.color.backgroundColor));
+                        ((DataViewHolder) holder).itemView.setBackgroundColor(mMessageBackgroundColor);
                         message.setNew(false);
 
                         ReadMessage.readMessage(mOauthRetrofit, mAccessToken, message.getFullname(),
@@ -183,7 +189,7 @@ public class MessageRecyclerViewAdapter extends PagedListAdapter<Message, Recycl
     public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
         super.onViewRecycled(holder);
         if (holder instanceof DataViewHolder) {
-            ((DataViewHolder) holder).itemView.setBackgroundColor(mResources.getColor(R.color.backgroundColor));
+            ((DataViewHolder) holder).itemView.setBackgroundColor(mMessageBackgroundColor);
             ((DataViewHolder) holder).titleTextView.setVisibility(View.VISIBLE);
             ((DataViewHolder) holder).authorTextView.setTextColor(mResources.getColor(R.color.primaryTextColor));
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeFontSizeEvent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/RecreateActivityEvent.java
index 2ef4b195..35fe54a1 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeFontSizeEvent.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/RecreateActivityEvent.java
@@ -1,4 +1,4 @@
 package ml.docilealligator.infinityforreddit.Event;
 
-public class ChangeFontSizeEvent {
+public class RecreateActivityEvent {
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostTypeBottomSheetFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostTypeBottomSheetFragment.java
index f511dfa2..7ca85e35 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostTypeBottomSheetFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostTypeBottomSheetFragment.java
@@ -48,31 +48,33 @@ public class PostTypeBottomSheetFragment extends RoundedBottomSheetDialogFragmen
 
         Activity activity = getActivity();
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
-                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
-            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        if (activity != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                    && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+                rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+            }
+
+            textTypeLinearLayout.setOnClickListener(view -> {
+                ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_TEXT);
+                dismiss();
+            });
+
+            linkTypeLinearLayout.setOnClickListener(view -> {
+                ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_LINK);
+                dismiss();
+            });
+
+            imageTypeLinearLayout.setOnClickListener(view -> {
+                ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_IMAGE);
+                dismiss();
+            });
+
+            videoTypeLinearLayout.setOnClickListener(view -> {
+                ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_VIDEO);
+                dismiss();
+            });
         }
 
-        textTypeLinearLayout.setOnClickListener(view -> {
-            ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_TEXT);
-            dismiss();
-        });
-
-        linkTypeLinearLayout.setOnClickListener(view -> {
-            ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_LINK);
-            dismiss();
-        });
-
-        imageTypeLinearLayout.setOnClickListener(view -> {
-            ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_IMAGE);
-            dismiss();
-        });
-
-        videoTypeLinearLayout.setOnClickListener(view -> {
-            ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_VIDEO);
-            dismiss();
-        });
-
         return rootView;
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/FontSizePreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/FontSizePreferenceFragment.java
index 6f71d9ad..17f5cf05 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/FontSizePreferenceFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/FontSizePreferenceFragment.java
@@ -8,7 +8,7 @@ import androidx.preference.PreferenceFragmentCompat;
 
 import org.greenrobot.eventbus.EventBus;
 
-import ml.docilealligator.infinityforreddit.Event.ChangeFontSizeEvent;
+import ml.docilealligator.infinityforreddit.Event.RecreateActivityEvent;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
 
@@ -25,7 +25,7 @@ public class FontSizePreferenceFragment extends PreferenceFragmentCompat {
 
             if (fontSizePreference != null) {
                 fontSizePreference.setOnPreferenceChangeListener((preference, newValue) -> {
-                    EventBus.getDefault().post(new ChangeFontSizeEvent());
+                    EventBus.getDefault().post(new RecreateActivityEvent());
                     activity.recreate();
                     return true;
                 });
@@ -33,14 +33,14 @@ public class FontSizePreferenceFragment extends PreferenceFragmentCompat {
 
             if (titleFontSizePreference != null) {
                 titleFontSizePreference.setOnPreferenceChangeListener((preference, newValue) -> {
-                    EventBus.getDefault().post(new ChangeFontSizeEvent());
+                    EventBus.getDefault().post(new RecreateActivityEvent());
                     return true;
                 });
             }
 
             if (contentFontSizePreference != null) {
                 contentFontSizePreference.setOnPreferenceChangeListener((preference, newValue) -> {
-                    EventBus.getDefault().post(new ChangeFontSizeEvent());
+                    EventBus.getDefault().post(new RecreateActivityEvent());
                     return true;
                 });
             }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java
index c3affaca..c5403979 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java
@@ -3,6 +3,7 @@ package ml.docilealligator.infinityforreddit.Settings;
 
 import android.app.Activity;
 import android.content.SharedPreferences;
+import android.content.res.Configuration;
 import android.os.Build;
 import android.os.Bundle;
 
@@ -18,6 +19,7 @@ import javax.inject.Inject;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWBlurEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeSpoilerBlurEvent;
+import ml.docilealligator.infinityforreddit.Event.RecreateActivityEvent;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.SharedPreferencesUtils;
@@ -43,11 +45,22 @@ public class MainPreferenceFragment extends PreferenceFragmentCompat {
         if (activity != null) {
             ((Infinity) activity.getApplication()).getAppComponent().inject(this);
 
+            SwitchPreference amoledDarkSwitch = findPreference(SharedPreferencesUtils.AMOLED_DARK_KEY);
             SwitchPreference nsfwSwitch = findPreference(SharedPreferencesUtils.NSFW_KEY);
             SwitchPreference blurNSFWSwitch = findPreference(SharedPreferencesUtils.BLUR_NSFW_KEY);
             SwitchPreference blurSpoilerSwitch = findPreference(SharedPreferencesUtils.BLUR_SPOILER_KEY);
             ListPreference themePreference = findPreference(SharedPreferencesUtils.THEME_KEY);
 
+            if(amoledDarkSwitch != null) {
+                amoledDarkSwitch.setOnPreferenceChangeListener((preference, newValue) -> {
+                    if((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_NO) {
+                        EventBus.getDefault().post(new RecreateActivityEvent());
+                        activity.recreate();
+                    }
+                    return true;
+                });
+            }
+
             if (nsfwSwitch != null) {
                 nsfwSwitch.setOnPreferenceChangeListener((preference, newValue) -> {
                     EventBus.getDefault().post(new ChangeNSFWEvent((Boolean) newValue));
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/SharedPreferencesUtils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/SharedPreferencesUtils.java
index f731ee7e..662f0e1e 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/SharedPreferencesUtils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/SharedPreferencesUtils.java
@@ -27,4 +27,5 @@ public class SharedPreferencesUtils {
     public static final String FONT_SIZE_KEY = "font_size";
     public static final String TITLE_FONT_SIZE_KEY = "title_font_size";
     public static final String CONTENT_FONT_SIZE_KEY = "content_font_size";
+    public static final String AMOLED_DARK_KEY = "amoled_dark";
 }