Merge pull request #229 from TacoTheDank/master

Miscellaneous improvements

29 files changed, 193 insertions, 162 deletions

diff --git a/app/build.gradle b/app/build.gradle
index 4b24f2d0..47c3b0d8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,7 +11,7 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         javaCompileOptions {
             annotationProcessorOptions {
-                arguments = [ eventBusIndex : 'ml.docilealligator.infinityforreddit.EventBusIndex' ]
+                arguments = [eventBusIndex: 'ml.docilealligator.infinityforreddit.EventBusIndex']
             }
         }
     }
@@ -35,79 +35,133 @@ android {
 }
 
 dependencies {
+/** AndroidX **/
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.browser:browser:1.2.0'
+    implementation 'androidx.biometric:biometric:1.1.0-rc01'
+    implementation 'androidx.browser:browser:1.3.0'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    // Lifecycle components
-    def lifecycleVersion = '2.2.0'
-    implementation "androidx.lifecycle:lifecycle-extensions:$lifecycleVersion"
-    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
-    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    def lifecycleVersion = "2.2.0"
+    implementation "androidx.lifecycle:lifecycle-livedata:$lifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycleVersion"
     annotationProcessor "androidx.lifecycle:lifecycle-common-java8:$lifecycleVersion"
     implementation 'androidx.paging:paging-runtime:2.1.2'
     implementation 'androidx.preference:preference:1.1.1'
-    // Room components
-    def roomVersion = '2.2.5'
+    def roomVersion = "2.2.6"
     implementation "androidx.room:room-runtime:$roomVersion"
     annotationProcessor "androidx.room:room-compiler:$roomVersion"
     implementation 'androidx.work:work-runtime:2.4.0'
     implementation 'com.google.android.material:material:1.3.0-alpha04'
 
-    implementation 'com.google.android.exoplayer:exoplayer-core:2.10.8'
-    implementation 'com.google.android.exoplayer:exoplayer-hls:2.10.8'
-    implementation 'com.google.android.exoplayer:exoplayer-dash:2.10.8'
-    implementation 'com.google.android.exoplayer:exoplayer-ui:2.10.8'
-    implementation 'com.alexvasilkov:gesture-views:2.6.0'
-    implementation 'com.github.bumptech.glide:glide:4.11.0'
-    annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
+/** ExoPlayer **/
+    def exoplayerVersion = "2.10.8"
+    implementation "com.google.android.exoplayer:exoplayer-core:$exoplayerVersion"
+    implementation "com.google.android.exoplayer:exoplayer-dash:$exoplayerVersion"
+    implementation "com.google.android.exoplayer:exoplayer-hls:$exoplayerVersion"
+    implementation "com.google.android.exoplayer:exoplayer-ui:$exoplayerVersion"
+    def toroVersion = "3.7.0.2010003"
+    implementation "im.ene.toro3:toro:$toroVersion"
+    implementation("im.ene.toro3:toro-ext-exoplayer:$toroVersion") {
+        exclude module: 'extension-ima'
+    }
+
+/** Third-party **/
+
+/**** Backend logic ****/
+
+    // Reactive stuff for event and async related
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
     implementation 'io.reactivex.rxjava2:rxjava:2.2.20'
-    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
-    implementation 'com.squareup.retrofit2:converter-scalars:2.9.0'
-    implementation 'jp.wasabeef:glide-transformations:4.1.0'
-    implementation 'com.google.dagger:dagger:2.29.1'
-    annotationProcessor 'com.google.dagger:dagger-compiler:2.29.1'
-    implementation 'com.jakewharton:butterknife:10.2.3'
-    annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3'
+
+    // HTTP clients
+    def retrofitVersion = "2.9.0"
+    implementation "com.squareup.retrofit2:retrofit:$retrofitVersion"
+    implementation "com.squareup.retrofit2:converter-scalars:$retrofitVersion"
+    implementation 'com.squareup.okhttp3:okhttp:4.2.2'
+
+    // Dependency injection
+    def daggerVersion = "2.30.1"
+    implementation "com.google.dagger:dagger:$daggerVersion"
+    annotationProcessor "com.google.dagger:dagger-compiler:$daggerVersion"
+
+    // Binding
+    // NOTE: Deprecated in favor of viewbinding
+    def butterknifeVersion = "10.2.3"
+    implementation "com.jakewharton:butterknife:$butterknifeVersion"
+    annotationProcessor "com.jakewharton:butterknife-compiler:$butterknifeVersion"
+
+    // Events
+    def eventbusVersion = "3.2.0"
+    implementation "org.greenrobot:eventbus:$eventbusVersion"
+    annotationProcessor "org.greenrobot:eventbus-annotation-processor:$eventbusVersion"
+
+    // TransactionTooLargeException avoidance
+    implementation 'com.github.livefront:bridge:v1.3.0'
+
+    // Bundle-saving without boilerplate
+    // NOTE: Deprecated
+    def stateVersion = "1.4.1"
+    implementation "com.evernote:android-state:$stateVersion"
+    annotationProcessor "com.evernote:android-state-processor:$stateVersion"
+
+    // Object to JSON
+    // NOTE: Replace with Squareup's Moshi?
+    implementation 'com.google.code.gson:gson:2.8.6'
+
+
+/**** User Interface (frontend) ****/
+
+    //Image loading
+    def glideVersion = "4.11.0"
+    implementation "com.github.bumptech.glide:glide:$glideVersion"
+    annotationProcessor "com.github.bumptech.glide:compiler:$glideVersion"
+    implementation 'jp.wasabeef:glide-transformations:4.3.0'
     implementation 'com.github.santalu:aspect-ratio-imageview:1.0.9'
-    implementation 'com.lsjwzh:materialloadingprogressbar:0.5.8-RELEASE'
-    implementation 'io.noties.markwon:core:4.5.0'
-    implementation 'io.noties.markwon:linkify:4.5.0'
-    implementation 'io.noties.markwon:ext-strikethrough:4.5.0'
-    implementation 'io.noties.markwon:simple-ext:4.5.0'
-    implementation 'io.noties.markwon:recycler-table:4.5.0'
     implementation 'pl.droidsonroids.gif:android-gif-drawable:1.2.21'
+    def bivVersion = "1.7.0"
+    implementation "com.github.Piasy.BigImageViewer:BigImageViewer:$bivVersion"
+    implementation "com.github.Piasy.BigImageViewer:GlideImageLoader:$bivVersion"
+    implementation "com.github.Piasy.BigImageViewer:GlideImageViewFactory:$bivVersion"
+
+    // Markdown
+    def markwonVersion = "4.6.0"
+    implementation "io.noties.markwon:core:$markwonVersion"
+    implementation "io.noties.markwon:ext-strikethrough:$markwonVersion"
+    implementation "io.noties.markwon:linkify:$markwonVersion"
+    implementation "io.noties.markwon:recycler-table:$markwonVersion"
+    implementation "io.noties.markwon:simple-ext:$markwonVersion"
+    implementation 'com.atlassian.commonmark:commonmark-ext-gfm-tables:0.14.0'
+
+    // Animations
+    implementation 'com.airbnb.android:lottie:3.4.4'
+
+    // Loading ProgressBar
+    implementation 'com.lsjwzh:materialloadingprogressbar:0.5.8-RELEASE'
+
+    // SearchView
     implementation 'com.github.Ferfalk:SimpleSearchView:0.1.4'
 
-    def eventbusVersion = '3.2.0'
-    implementation "org.greenrobot:eventbus:$eventbusVersion"
-    annotationProcessor "org.greenrobot:eventbus-annotation-processor:$eventbusVersion"
+    // Customizable TextView
     implementation 'com.libRG:customtextview:2.4'
-    implementation 'com.github.Deishelon:RoundedBottomSheet:1.0.1'
-    implementation 'com.github.livefront:bridge:v1.2.1'
-    implementation 'com.evernote:android-state:1.4.1'
-    annotationProcessor 'com.evernote:android-state-processor:1.4.1'
-    implementation 'com.nex3z:flow-layout:1.3.0'
+
+    // Dismiss gesturing
     implementation 'com.r0adkll:slidableactivity:2.1.0'
-    implementation 'com.atlassian.commonmark:commonmark:0.14.0'
-    implementation 'com.google.code.gson:gson:2.8.6'
-    implementation 'me.zhanghai.android.fastscroll:library:1.1.2'
-    implementation "com.thefuntasty.hauler:core:3.1.0"
-    implementation 'com.github.Piasy:BigImageViewer:1.6.5'
-    implementation 'androidx.biometric:biometric:1.1.0-rc01'
-    implementation 'com.airbnb.android:lottie:3.4.4'
+    implementation 'com.thefuntasty.hauler:core:3.1.0'
+
+    // Bottom sheet with rounded corners
+    implementation 'com.github.Deishelon:RoundedBottomSheet:1.0.1'
+
+    // FlowLayout (auto-spacing)
+    implementation 'com.nex3z:flow-layout:1.3.3'
+
+    // RecyclerView fast scrolling
+    implementation 'me.zhanghai.android.fastscroll:library:1.1.5'
+
+    // Crash screen
     implementation 'com.melegy.redscreenofdeath:red-screen-of-death:0.1.2'
-    // debugImplementation because LeakCanary should only run in debug builds.
-    debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.5'
 
-    def toroVersion = '3.7.0.2010003'
-    implementation "im.ene.toro3:toro:$toroVersion"
-    implementation("im.ene.toro3:toro-ext-exoplayer:$toroVersion") {
-        exclude module: 'extension-ima'
-    }
 
-    testImplementation 'junit:junit:4.13.1'
-    androidTestImplementation 'androidx.test:runner:1.3.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+/**** Builds and flavors ****/
+    // debugImplementation because LeakCanary should only run in debug builds.
+    debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.5'
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/AccountSavedThingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/AccountSavedThingActivity.java
index c33104ac..a87c10d0 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/AccountSavedThingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/AccountSavedThingActivity.java
@@ -15,8 +15,8 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.lifecycle.Lifecycle;
 import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
 
@@ -199,7 +199,7 @@ public class AccountSavedThingActivity extends BaseActivity implements ActivityT
     }
 
     private void initializeViewPager() {
-        sectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager, getLifecycle());
+        sectionsPagerAdapter = new SectionsPagerAdapter(this);
         viewPager2.setAdapter(sectionsPagerAdapter);
         viewPager2.setOffscreenPageLimit(2);
         viewPager2.setUserInputEnabled(!mSharedPreferences.getBoolean(SharedPreferencesUtils.DISABLE_SWIPING_BETWEEN_TABS, false));
@@ -345,8 +345,8 @@ public class AccountSavedThingActivity extends BaseActivity implements ActivityT
 
     private class SectionsPagerAdapter extends FragmentStateAdapter {
 
-        SectionsPagerAdapter(FragmentManager fm, Lifecycle lifecycle) {
-            super(fm, lifecycle);
+        SectionsPagerAdapter(FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/CustomThemeListingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/CustomThemeListingActivity.java
index c30cc188..03f6ae9e 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/CustomThemeListingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/CustomThemeListingActivity.java
@@ -14,6 +14,7 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.app.ActivityCompat;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -248,7 +249,7 @@ public class CustomThemeListingActivity extends BaseActivity implements
 
     @Subscribe
     public void onRecreateActivityEvent(RecreateActivityEvent recreateActivityEvent) {
-        recreate();
+        ActivityCompat.recreate(this);
     }
 
     @Override
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/LinkResolverActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/LinkResolverActivity.java
index bac8f3da..27fa8298 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/LinkResolverActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/LinkResolverActivity.java
@@ -10,7 +10,9 @@ import android.os.Bundle;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.browser.customtabs.CustomTabColorSchemeParams;
 import androidx.browser.customtabs.CustomTabsIntent;
+import androidx.browser.customtabs.CustomTabsService;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -23,8 +25,6 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.utils.SharedPreferencesUtils;
 
-import static androidx.browser.customtabs.CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION;
-
 public class LinkResolverActivity extends AppCompatActivity {
 
     public static final String EXTRA_MESSAGE_FULLNAME = "ENF";
@@ -276,7 +276,7 @@ public class LinkResolverActivity extends AppCompatActivity {
         ArrayList<ResolveInfo> packagesSupportingCustomTabs = new ArrayList<>();
         for (ResolveInfo info : resolvedActivityList) {
             Intent serviceIntent = new Intent();
-            serviceIntent.setAction(ACTION_CUSTOM_TABS_CONNECTION);
+            serviceIntent.setAction(CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION);
             serviceIntent.setPackage(info.activityInfo.packageName);
             // Check if this package also resolves the Custom Tabs service.
             if (pm.resolveService(serviceIntent, 0) != null) {
@@ -291,8 +291,11 @@ public class LinkResolverActivity extends AppCompatActivity {
         if (!resolveInfos.isEmpty()) {
             CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
             // add share action to menu list
-            builder.addDefaultShareMenuItem();
-            builder.setToolbarColor(mCustomThemeWrapper.getColorPrimary());
+            builder.setShareState(CustomTabsIntent.SHARE_STATE_ON);
+            builder.setDefaultColorSchemeParams(
+                    new CustomTabColorSchemeParams.Builder()
+                            .setToolbarColor(mCustomThemeWrapper.getColorPrimary())
+                            .build());
             CustomTabsIntent customTabsIntent = builder.build();
             customTabsIntent.intent.setPackage(resolveInfos.get(0).activityInfo.packageName);
             if (uri.getScheme() == null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/MainActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/MainActivity.java
index 2d139293..fe9da437 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/MainActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/MainActivity.java
@@ -27,11 +27,12 @@ import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.app.ActivityCompat;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -772,7 +773,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         int tabCount = mMainActivityTabsSharedPreferences.getInt((mAccountName == null ? "" : mAccountName) + SharedPreferencesUtils.MAIN_PAGE_TAB_COUNT, 3);
         mShowFavoriteSubscribedSubreddits = mMainActivityTabsSharedPreferences.getBoolean((mAccountName == null ? "" : mAccountName) + SharedPreferencesUtils.MAIN_PAGE_SHOW_FAVORITE_SUBSCRIBED_SUBREDDITS, false);
         mShowSubscribedSubreddits = mMainActivityTabsSharedPreferences.getBoolean((mAccountName == null ? "" : mAccountName) + SharedPreferencesUtils.MAIN_PAGE_SHOW_SUBSCRIBED_SUBREDDITS, false);
-        sectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager, getLifecycle(), tabCount,
+        sectionsPagerAdapter = new SectionsPagerAdapter(this, tabCount,
                 mShowFavoriteSubscribedSubreddits, mShowSubscribedSubreddits);
         viewPager2.setAdapter(sectionsPagerAdapter);
         viewPager2.setOffscreenPageLimit(1);
@@ -1144,7 +1145,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
 
     @Subscribe
     public void onRecreateActivityEvent(RecreateActivityEvent recreateActivityEvent) {
-        recreate();
+        ActivityCompat.recreate(this);
     }
 
     @Subscribe
@@ -1313,8 +1314,8 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         List<SubscribedSubredditData> favoriteSubscribedSubreddits;
         List<SubscribedSubredditData> subscribedSubreddits;
 
-        SectionsPagerAdapter(FragmentManager fm, Lifecycle lifecycle, int tabCount, boolean showFavoriteSubscribedSubreddits, boolean showSubscribedSubreddits) {
-            super(fm, lifecycle);
+        SectionsPagerAdapter(FragmentActivity fa, int tabCount, boolean showFavoriteSubscribedSubreddits, boolean showSubscribedSubreddits) {
+            super(fa);
             this.tabCount = tabCount;
             favoriteSubscribedSubreddits = new ArrayList<>();
             subscribedSubreddits = new ArrayList<>();
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostImageActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostImageActivity.java
index a8517925..85601581 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostImageActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostImageActivity.java
@@ -22,6 +22,7 @@ import androidx.annotation.Nullable;
 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;
@@ -528,11 +529,7 @@ public class PostImageActivity extends BaseActivity implements FlairBottomSheetF
                 }
                 intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                    startForegroundService(intent);
-                } else {
-                    startService(intent);
-                }
+                ContextCompat.startForegroundService(this, intent);
 
                 return true;
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostLinkActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostLinkActivity.java
index 2f76cd9d..c53d43c5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostLinkActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostLinkActivity.java
@@ -17,6 +17,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 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;
@@ -449,7 +450,7 @@ public class PostLinkActivity extends BaseActivity implements FlairBottomSheetFr
                 intent.putExtra(SubmitPostService.EXTRA_IS_SPOILER, isSpoiler);
                 intent.putExtra(SubmitPostService.EXTRA_IS_NSFW, isNSFW);
                 intent.putExtra(SubmitPostService.EXTRA_POST_TYPE, SubmitPostService.EXTRA_POST_TEXT_OR_LINK);
-                startService(intent);
+                ContextCompat.startForegroundService(this, intent);
 
                 return true;
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostTextActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostTextActivity.java
index 31814057..7d04e456 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostTextActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostTextActivity.java
@@ -17,6 +17,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.content.ContextCompat;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
@@ -466,7 +467,7 @@ public class PostTextActivity extends BaseActivity implements FlairBottomSheetFr
             intent.putExtra(SubmitPostService.EXTRA_IS_SPOILER, isSpoiler);
             intent.putExtra(SubmitPostService.EXTRA_IS_NSFW, isNSFW);
             intent.putExtra(SubmitPostService.EXTRA_POST_TYPE, SubmitPostService.EXTRA_POST_TEXT_OR_LINK);
-            startService(intent);
+            ContextCompat.startForegroundService(this, intent);
 
             return true;
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostVideoActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostVideoActivity.java
index b2b28948..6d8e8f26 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostVideoActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/PostVideoActivity.java
@@ -20,6 +20,7 @@ import androidx.annotation.Nullable;
 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;
@@ -27,7 +28,7 @@ import com.bumptech.glide.request.RequestOptions;
 import com.google.android.exoplayer2.ExoPlayerFactory;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.SimpleExoPlayer;
-import com.google.android.exoplayer2.source.ExtractorMediaSource;
+import com.google.android.exoplayer2.source.ProgressiveMediaSource;
 import com.google.android.exoplayer2.ui.PlayerView;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
@@ -424,7 +425,7 @@ public class PostVideoActivity extends BaseActivity implements FlairBottomSheetF
         constraintLayout.setVisibility(View.GONE);
         selectAgainTextView.setVisibility(View.VISIBLE);
         videoPlayerView.setVisibility(View.VISIBLE);
-        player.prepare(new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(videoUri));
+        player.prepare(new ProgressiveMediaSource.Factory(dataSourceFactory).createMediaSource(videoUri));
         player.setPlayWhenReady(true);
         wasPlaying = true;
     }
@@ -528,11 +529,7 @@ public class PostVideoActivity extends BaseActivity implements FlairBottomSheetF
                 intent.putExtra(SubmitPostService.EXTRA_POST_TYPE, SubmitPostService.EXTRA_POST_TYPE_VIDEO);
                 intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                    startForegroundService(intent);
-                } else {
-                    startService(intent);
-                }
+                ContextCompat.startForegroundService(this, intent);
 
                 return true;
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SearchResultActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SearchResultActivity.java
index b605aedb..a3ca8889 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SearchResultActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SearchResultActivity.java
@@ -16,8 +16,8 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.lifecycle.Lifecycle;
 import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
 
@@ -221,7 +221,7 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
     }
 
     private void initializeViewPager() {
-        sectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager, getLifecycle());
+        sectionsPagerAdapter = new SectionsPagerAdapter(this);
         viewPager2.setAdapter(sectionsPagerAdapter);
         viewPager2.setOffscreenPageLimit(3);
         viewPager2.setUserInputEnabled(!mSharedPreferences.getBoolean(SharedPreferencesUtils.DISABLE_SWIPING_BETWEEN_TABS, false));
@@ -381,8 +381,8 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
 
     private class SectionsPagerAdapter extends FragmentStateAdapter {
 
-        public SectionsPagerAdapter(FragmentManager fm, Lifecycle lifecycle) {
-            super(fm, lifecycle);
+        public SectionsPagerAdapter(FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SettingsActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SettingsActivity.java
index 699946a5..df889ed7 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SettingsActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SettingsActivity.java
@@ -7,6 +7,7 @@ import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.app.ActivityCompat;
 import androidx.fragment.app.Fragment;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
@@ -192,6 +193,6 @@ public class SettingsActivity extends BaseActivity implements
 
     @Subscribe
     public void onRecreateActivityEvent(RecreateActivityEvent recreateActivityEvent) {
-        recreate();
+        ActivityCompat.recreate(this);
     }
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SubmitCrosspostActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SubmitCrosspostActivity.java
index 04c70dc4..fb7e5a0b 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SubmitCrosspostActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/SubmitCrosspostActivity.java
@@ -21,6 +21,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 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;
@@ -520,7 +521,7 @@ public class SubmitCrosspostActivity extends BaseActivity implements FlairBottom
                 intent.putExtra(SubmitPostService.EXTRA_IS_SPOILER, isSpoiler);
                 intent.putExtra(SubmitPostService.EXTRA_IS_NSFW, isNSFW);
                 intent.putExtra(SubmitPostService.EXTRA_POST_TYPE, SubmitPostService.EXTRA_POST_TYPE_CROSSPOST);
-                startService(intent);
+                ContextCompat.startForegroundService(this, intent);
 
                 return true;
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
index f336f94f..a86e2c86 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
@@ -283,7 +283,7 @@ public class ViewImageOrGifActivity extends AppCompatActivity implements SetAsWa
 
                 isDownloading = true;
 
-                if (Build.VERSION.SDK_INT >= 23) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                     if (ContextCompat.checkSelfPermission(this,
                             Manifest.permission.WRITE_EXTERNAL_STORAGE)
                             != PackageManager.PERMISSION_GRANTED) {
@@ -341,11 +341,7 @@ public class ViewImageOrGifActivity extends AppCompatActivity implements SetAsWa
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, isGif ? DownloadMediaService.EXTRA_MEDIA_TYPE_GIF : DownloadMediaService.EXTRA_MEDIA_TYPE_IMAGE);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, mImageFileName);
         intent.putExtra(DownloadMediaService.EXTRA_SUBREDDIT_NAME, mSubredditName);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            startForegroundService(intent);
-        } else {
-            startService(intent);
-        }
+        ContextCompat.startForegroundService(this, intent);
         Toast.makeText(this, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
index 1771b8dc..4852c32d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
@@ -28,8 +28,8 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
@@ -842,7 +842,7 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
                     }
                 }).execute();
 
-        sectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager, getLifecycle());
+        sectionsPagerAdapter = new SectionsPagerAdapter(this);
         viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
             @Override
             public void onPageSelected(int position) {
@@ -1233,8 +1233,8 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
 
     private class SectionsPagerAdapter extends FragmentStateAdapter {
 
-        SectionsPagerAdapter(FragmentManager fm, Lifecycle lifecycle) {
-            super(fm, lifecycle);
+        SectionsPagerAdapter(FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
index 3ddf99f5..9c77e0a9 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
@@ -31,8 +31,8 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
-import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.viewpager2.adapter.FragmentStateAdapter;
 import androidx.viewpager2.widget.ViewPager2;
@@ -604,7 +604,7 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
     }
 
     private void initializeViewPager() {
-        sectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager, getLifecycle());
+        sectionsPagerAdapter = new SectionsPagerAdapter(this);
         viewPager2.setAdapter(sectionsPagerAdapter);
         viewPager2.setOffscreenPageLimit(2);
         viewPager2.setUserInputEnabled(!mSharedPreferences.getBoolean(SharedPreferencesUtils.DISABLE_SWIPING_BETWEEN_TABS, false));
@@ -1308,8 +1308,8 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
 
     private class SectionsPagerAdapter extends FragmentStateAdapter {
 
-        SectionsPagerAdapter(FragmentManager fm, Lifecycle lifecycle) {
-            super(fm, lifecycle);
+        SectionsPagerAdapter(FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
index df48ab26..417d8de7 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
@@ -419,7 +419,7 @@ public class ViewVideoActivity extends AppCompatActivity {
                 }
 
                 isDownloading = true;
-                if (Build.VERSION.SDK_INT >= 23) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                     if (ContextCompat.checkSelfPermission(this,
                             Manifest.permission.WRITE_EXTERNAL_STORAGE)
                             != PackageManager.PERMISSION_GRANTED) {
@@ -472,29 +472,20 @@ public class ViewVideoActivity extends AppCompatActivity {
     private void download() {
         isDownloading = false;
 
+        Intent intent;
         if (videoType != VIDEO_TYPE_NORMAL) {
-            Intent intent = new Intent(this, DownloadMediaService.class);
+            intent = new Intent(this, DownloadMediaService.class);
             intent.putExtra(DownloadMediaService.EXTRA_URL, videoDownloadUrl);
             intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, DownloadMediaService.EXTRA_MEDIA_TYPE_VIDEO);
             intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, videoFileName);
             intent.putExtra(DownloadMediaService.EXTRA_SUBREDDIT_NAME, subredditName);
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                startForegroundService(intent);
-            } else {
-                startService(intent);
-            }
         } else {
-            Intent intent = new Intent(this, DownloadRedditVideoService.class);
+            intent = new Intent(this, DownloadRedditVideoService.class);
             intent.putExtra(DownloadRedditVideoService.EXTRA_VIDEO_URL, videoDownloadUrl);
             intent.putExtra(DownloadRedditVideoService.EXTRA_POST_ID, id);
             intent.putExtra(DownloadRedditVideoService.EXTRA_SUBREDDIT, subredditName);
-
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                startForegroundService(intent);
-            } else {
-                startService(intent);
-            }
         }
+        ContextCompat.startForegroundService(this, intent);
         Toast.makeText(this, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/bottomsheetfragments/SetAsWallpaperBottomSheetFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/bottomsheetfragments/SetAsWallpaperBottomSheetFragment.java
index 05d31cf3..1dd45fe2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/bottomsheetfragments/SetAsWallpaperBottomSheetFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/bottomsheetfragments/SetAsWallpaperBottomSheetFragment.java
@@ -2,6 +2,7 @@ package ml.docilealligator.infinityforreddit.bottomsheetfragments;
 
 import android.app.Activity;
 import android.content.Context;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -49,7 +50,7 @@ public class SetAsWallpaperBottomSheetFragment extends RoundedBottomSheetDialogF
             dismiss();
         });
 
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
             homeScreenTextvView.setVisibility(View.VISIBLE);
             lockScreenTextView.setVisibility(View.VISIBLE);
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/customviews/LollipopBugFixedWebView.java b/app/src/main/java/ml/docilealligator/infinityforreddit/customviews/LollipopBugFixedWebView.java
index 6392902d..71387a2f 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/customviews/LollipopBugFixedWebView.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/customviews/LollipopBugFixedWebView.java
@@ -21,7 +21,8 @@ public class LollipopBugFixedWebView extends WebView{
 
     // To fix Android Lollipop WebView problem create a new configuration on that Android version only
     private static Context getFixedContext(Context context) {
-        if (Build.VERSION.SDK_INT == 21 || Build.VERSION.SDK_INT == 22) // Android Lollipop 5.0 & 5.1
+        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP
+                || Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP_MR1) // Android Lollipop 5.0 & 5.1
             return context.createConfigurationContext(new Configuration());
         return context;
     }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurImageFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurImageFragment.java
index d97fedd4..51bfeb6c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurImageFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurImageFragment.java
@@ -157,7 +157,7 @@ public class ViewImgurImageFragment extends Fragment {
 
                 isDownloading = true;
 
-                if (Build.VERSION.SDK_INT >= 23) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                     if (ContextCompat.checkSelfPermission(activity,
                             Manifest.permission.WRITE_EXTERNAL_STORAGE)
                             != PackageManager.PERMISSION_GRANTED) {
@@ -238,11 +238,7 @@ public class ViewImgurImageFragment extends Fragment {
         intent.putExtra(DownloadMediaService.EXTRA_URL, imgurMedia.getLink());
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, DownloadMediaService.EXTRA_MEDIA_TYPE_IMAGE);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, imgurMedia.getFileName());
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            activity.startForegroundService(intent);
-        } else {
-            activity.startService(intent);
-        }
+        ContextCompat.startForegroundService(activity, intent);
         Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurVideoFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurVideoFragment.java
index 3af97f85..01961e17 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurVideoFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewImgurVideoFragment.java
@@ -149,7 +149,7 @@ public class ViewImgurVideoFragment extends Fragment {
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         if (item.getItemId() == R.id.action_download_view_imgur_video_fragment) {
             isDownloading = true;
-            if (Build.VERSION.SDK_INT >= 23) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 if (ContextCompat.checkSelfPermission(activity,
                         Manifest.permission.WRITE_EXTERNAL_STORAGE)
                         != PackageManager.PERMISSION_GRANTED) {
@@ -189,11 +189,7 @@ public class ViewImgurVideoFragment extends Fragment {
         intent.putExtra(DownloadMediaService.EXTRA_URL, imgurMedia.getLink());
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, DownloadMediaService.EXTRA_MEDIA_TYPE_VIDEO);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, imgurMedia.getFileName());
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            activity.startForegroundService(intent);
-        } else {
-            activity.startService(intent);
-        }
+        ContextCompat.startForegroundService(activity, intent);
         Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryImageOrGifFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryImageOrGifFragment.java
index 12e4a884..585730d5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryImageOrGifFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryImageOrGifFragment.java
@@ -223,7 +223,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
 
                 isDownloading = true;
 
-                if (Build.VERSION.SDK_INT >= 23) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                     if (ContextCompat.checkSelfPermission(activity,
                             Manifest.permission.WRITE_EXTERNAL_STORAGE)
                             != PackageManager.PERMISSION_GRANTED) {
@@ -272,11 +272,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, media.mediaType == Post.Gallery.TYPE_GIF ? DownloadMediaService.EXTRA_MEDIA_TYPE_GIF: DownloadMediaService.EXTRA_MEDIA_TYPE_IMAGE);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, media.fileName);
         intent.putExtra(DownloadMediaService.EXTRA_SUBREDDIT_NAME, subredditName);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            activity.startForegroundService(intent);
-        } else {
-            activity.startService(intent);
-        }
+        ContextCompat.startForegroundService(activity, intent);
         Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryVideoFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryVideoFragment.java
index 9530823d..a1258ce2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryVideoFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryVideoFragment.java
@@ -152,7 +152,7 @@ public class ViewRedditGalleryVideoFragment extends Fragment {
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         if (item.getItemId() == R.id.action_download_view_reddit_gallery_video_fragment) {
             isDownloading = true;
-            if (Build.VERSION.SDK_INT >= 23) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 if (ContextCompat.checkSelfPermission(activity,
                         Manifest.permission.WRITE_EXTERNAL_STORAGE)
                         != PackageManager.PERMISSION_GRANTED) {
@@ -193,11 +193,7 @@ public class ViewRedditGalleryVideoFragment extends Fragment {
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, DownloadMediaService.EXTRA_MEDIA_TYPE_VIDEO);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, galleryVideo.fileName);
         intent.putExtra(DownloadMediaService.EXTRA_SUBREDDIT_NAME, subredditName);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            activity.startForegroundService(intent);
-        } else {
-            activity.startService(intent);
-        }
+        ContextCompat.startForegroundService(activity, intent);
         Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadMediaService.java b/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadMediaService.java
index 1246634a..a326d81f 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadMediaService.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadMediaService.java
@@ -142,7 +142,7 @@ public class DownloadMediaService extends Service {
                 if (response.isSuccessful() && response.body() != null) {
                     String destinationFileDirectory = getDownloadLocation(mediaType);
                     if (destinationFileDirectory.equals("")) {
-                        if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
                             File directory = getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
                             if (directory != null) {
                                 String directoryPath = separateDownloadFolder && subredditName != null && !subredditName.equals("") ? directory.getAbsolutePath() + "/Infinity/" + subredditName + "/" : directory.getAbsolutePath() + "/Infinity/";
@@ -235,7 +235,7 @@ public class DownloadMediaService extends Service {
                                              int mediaType) throws IOException {
             ContentResolver contentResolver = getContentResolver();
             if (isDefaultDestination) {
-                if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
                     InputStream inputStream = body.byteStream();
                     OutputStream outputStream = new FileOutputStream(destinationFileUriString);
                     byte[] fileReader = new byte[4096];
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadRedditVideoService.java b/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadRedditVideoService.java
index c4f37aca..73839464 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadRedditVideoService.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/services/DownloadRedditVideoService.java
@@ -146,7 +146,7 @@ public class DownloadRedditVideoService extends Service {
                         String destinationFileUriString;
                         boolean isDefaultDestination;
                         if (destinationFileDirectory.equals("")) {
-                            if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
                                 File destinationDirectory = getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
                                 if (destinationDirectory != null) {
                                     String destinationDirectoryPath = separateDownloadFolder ? destinationDirectory.getAbsolutePath() + "/Infinity/" + subredditName + "/" : destinationDirectory.getAbsolutePath() + "/Infinity/";
@@ -396,7 +396,7 @@ public class DownloadRedditVideoService extends Service {
                                       boolean isDefaultDestination) throws IOException {
             ContentResolver contentResolver = getContentResolver();
             if (isDefaultDestination) {
-                if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
                     InputStream in = new FileInputStream(srcPath);
                     OutputStream out = new FileOutputStream(destinationFileUriString);
                     byte[] buf = new byte[1024];
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/settings/FontPreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/settings/FontPreferenceFragment.java
index 2d608ca5..0d43e619 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/settings/FontPreferenceFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/settings/FontPreferenceFragment.java
@@ -5,6 +5,7 @@ import android.content.Context;
 import android.os.Bundle;
 
 import androidx.annotation.NonNull;
+import androidx.core.app.ActivityCompat;
 import androidx.preference.ListPreference;
 import androidx.preference.PreferenceFragmentCompat;
 
@@ -30,7 +31,7 @@ public class FontPreferenceFragment extends PreferenceFragmentCompat {
         if (fontFamilyPreference != null) {
             fontFamilyPreference.setOnPreferenceChangeListener((preference, newValue) -> {
                 EventBus.getDefault().post(new RecreateActivityEvent());
-                activity.recreate();
+                ActivityCompat.recreate(activity);
                 return true;
             });
         }
@@ -52,7 +53,7 @@ public class FontPreferenceFragment extends PreferenceFragmentCompat {
         if (fontSizePreference != null) {
             fontSizePreference.setOnPreferenceChangeListener((preference, newValue) -> {
                 EventBus.getDefault().post(new RecreateActivityEvent());
-                activity.recreate();
+                ActivityCompat.recreate(activity);
                 return true;
             });
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/settings/ThemePreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/settings/ThemePreferenceFragment.java
index e28cd52f..fba59d25 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/settings/ThemePreferenceFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/settings/ThemePreferenceFragment.java
@@ -9,6 +9,7 @@ import android.os.Bundle;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.app.AppCompatDelegate;
+import androidx.core.app.ActivityCompat;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.ListPreference;
@@ -109,7 +110,7 @@ public class ThemePreferenceFragment extends PreferenceFragmentCompat {
             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();
+                    ActivityCompat.recreate(activity);
                 }
                 return true;
             });
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
index a7a9eb21..37587ede 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
@@ -2,9 +2,9 @@ package ml.docilealligator.infinityforreddit.subreddit;
 
 import androidx.annotation.NonNull;
 
-import com.facebook.common.internal.ImmutableMap;
-
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 
 import ml.docilealligator.infinityforreddit.apis.RedditAPI;
@@ -50,7 +50,8 @@ public class FetchSubredditData {
                                           boolean nsfw, final FetchSubredditListingDataListener fetchSubredditListingDataListener) {
         RedditAPI api = retrofit.create(RedditAPI.class);
 
-        Map<String, String> headers = accessToken != null ?  APIUtils.getOAuthHeader(accessToken) : ImmutableMap.of();
+        Map<String, String> map = new HashMap<>();
+        Map<String, String> headers = accessToken != null ?  APIUtils.getOAuthHeader(accessToken) : Collections.unmodifiableMap(map);
         Call<String> subredditDataCall = api.searchSubreddits(query, after, sortType, nsfw ? 1 : 0, headers);
         subredditDataCall.enqueue(new Callback<String>() {
             @Override
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/NotificationUtils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/NotificationUtils.java
index 75cc004a..3c3255de 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/NotificationUtils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/NotificationUtils.java
@@ -3,6 +3,7 @@ package ml.docilealligator.infinityforreddit.utils;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.content.Context;
+import android.os.Build;
 
 import androidx.core.app.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
@@ -36,7 +37,7 @@ public class NotificationUtils {
                                                                Context context, String title, String content,
                                                                String summary, String channelId, String channelName,
                                                                String group, int color) {
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT);
             notificationManager.createNotificationChannel(channel);
         }
@@ -56,7 +57,7 @@ public class NotificationUtils {
     public static NotificationCompat.Builder buildSummaryNotification(Context context, NotificationManagerCompat notificationManager,
                                                                       String title, String content, String channelId,
                                                                       String channelName, String group, int color) {
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT);
             notificationManager.createNotificationChannel(channel);
         }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/Utils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/Utils.java
index 8d51256d..2a59f2a5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/Utils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/Utils.java
@@ -8,7 +8,6 @@ import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.NetworkInfo;
 import android.os.Build;
-import android.text.Html;
 import android.text.Spannable;
 import android.util.DisplayMetrics;
 import android.view.inputmethod.InputMethodManager;
@@ -17,6 +16,7 @@ import android.widget.TextView;
 import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.core.text.HtmlCompat;
 
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
@@ -135,13 +135,10 @@ public class Utils {
     }
 
     public static void setHTMLWithImageToTextView(TextView textView, String content, boolean enlargeImage) {
-        Spannable html;
         GlideImageGetter glideImageGetter = new GlideImageGetter(textView, enlargeImage);
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
-            html = (Spannable) Html.fromHtml(content, Html.FROM_HTML_MODE_LEGACY, glideImageGetter, null);
-        } else {
-            html = (Spannable) Html.fromHtml(content, glideImageGetter, null);
-        }
+        Spannable html = (Spannable) HtmlCompat.fromHtml(
+                content, HtmlCompat.FROM_HTML_MODE_LEGACY, glideImageGetter, null);
+
         textView.setText(html);
     }