Data Saving Mode is available.

11 files changed, 223 insertions, 29 deletions

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 cc047de9..e6184b6a 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
@@ -82,7 +82,7 @@ import ml.docilealligator.infinityforreddit.CustomView.CustomToroContainer;
 import ml.docilealligator.infinityforreddit.DeleteThing;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWBlurEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeSpoilerBlurEvent;
-import ml.docilealligator.infinityforreddit.Event.ChangeWifiStatusEvent;
+import ml.docilealligator.infinityforreddit.Event.ChangeNetworkStatusEvent;
 import ml.docilealligator.infinityforreddit.Event.PostUpdateEventToDetailActivity;
 import ml.docilealligator.infinityforreddit.Event.PostUpdateEventToPostList;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
@@ -1373,11 +1373,21 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
     }
 
     @Subscribe
-    public void onChangeWifiStatusEvent(ChangeWifiStatusEvent changeWifiStatusEvent) {
+    public void onChangeNetworkStatusEvent(ChangeNetworkStatusEvent changeNetworkStatusEvent) {
         if (mAdapter != null) {
             String autoplay = mSharedPreferences.getString(SharedPreferencesUtils.VIDEO_AUTOPLAY, SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_NEVER);
+            String dataSavingMode = mSharedPreferences.getString(SharedPreferencesUtils.DATA_SAVING_MODE, SharedPreferencesUtils.DATA_SAVING_MODE_OFF);
+            boolean stateChanged = false;
             if (autoplay.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ON_WIFI)) {
-                mAdapter.setAutoplay(changeWifiStatusEvent.isConnectedToWifi);
+                mAdapter.setAutoplay(changeNetworkStatusEvent.connectedNetwork == Utils.NETWORK_TYPE_WIFI);
+                stateChanged = true;
+            }
+            if (dataSavingMode.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA)) {
+                mAdapter.setDataSavingMode(changeNetworkStatusEvent.connectedNetwork == Utils.NETWORK_TYPE_CELLULAR);
+                stateChanged = true;
+            }
+
+            if (stateChanged) {
                 refreshAdapter();
             }
         }
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 d1c417f5..5c5f9a04 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
@@ -177,6 +177,7 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
     private double mStartAutoplayVisibleAreaOffset;
     private boolean mMuteNSFWVideo;
     private boolean mAutomaticallyTryRedgifs;
+    private boolean mDataSavingMode;
     private CommentRecyclerViewAdapterCallback mCommentRecyclerViewAdapterCallback;
     private boolean isInitiallyLoading;
     private boolean isInitiallyLoadingFailed;
@@ -463,10 +464,11 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         mShowAbsoluteNumberOfVotes = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_ABSOLUTE_NUMBER_OF_VOTES, true);
 
         String autoplayString = sharedPreferences.getString(SharedPreferencesUtils.VIDEO_AUTOPLAY, SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_NEVER);
+        int networkType = Utils.getConnectedNetwork(activity);
         if (autoplayString.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ALWAYS_ON)) {
             mAutoplay = true;
         } else if (autoplayString.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ON_WIFI)) {
-            mAutoplay = Utils.isConnectedToWifi(activity);
+            mAutoplay = networkType == Utils.NETWORK_TYPE_WIFI;
         }
         mAutoplayNsfwVideos = sharedPreferences.getBoolean(SharedPreferencesUtils.AUTOPLAY_NSFW_VIDEOS, true);
         mMuteAutoplayingVideos = sharedPreferences.getBoolean(SharedPreferencesUtils.MUTE_AUTOPLAYING_VIDEOS, true);
@@ -480,6 +482,13 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         mMuteNSFWVideo = sharedPreferences.getBoolean(SharedPreferencesUtils.MUTE_NSFW_VIDEO, false);
         mAutomaticallyTryRedgifs = sharedPreferences.getBoolean(SharedPreferencesUtils.AUTOMATICALLY_TRY_REDGIFS, true);
 
+        String dataSavingModeString = sharedPreferences.getString(SharedPreferencesUtils.DATA_SAVING_MODE, SharedPreferencesUtils.DATA_SAVING_MODE_OFF);
+        if (dataSavingModeString.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ALWAYS)) {
+            mDataSavingMode = true;
+        } else if (dataSavingModeString.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA)) {
+            mDataSavingMode = networkType == Utils.NETWORK_TYPE_CELLULAR;
+        }
+
         mCommentRecyclerViewAdapterCallback = commentRecyclerViewAdapterCallback;
         isInitiallyLoading = true;
         isInitiallyLoadingFailed = false;
@@ -1401,7 +1410,13 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
     private Post.Preview getSuitablePreview(ArrayList<Post.Preview> previews) {
         Post.Preview preview;
         if (!previews.isEmpty()) {
-            preview = previews.get(0);
+            int previewIndex;
+            if (mDataSavingMode && previews.size() > 2) {
+                previewIndex = previews.size() / 2;
+            } else {
+                previewIndex = 0;
+            }
+            preview = previews.get(previewIndex);
             if (preview.getPreviewWidth() * preview.getPreviewHeight() >= 65 * 1000 * 1000) {
                 for (int i = previews.size() - 1; i >= 1; i--) {
                     preview = previews.get(i);
@@ -1835,6 +1850,10 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         mAutoplay = autoplay;
     }
 
+    public void setDataSavingMode(boolean dataSavingMode) {
+        mDataSavingMode = dataSavingMode;
+    }
+
     public void onItemSwipe(RecyclerView.ViewHolder viewHolder, int direction) {
         if (viewHolder instanceof PostDetailBaseViewHolder) {
             if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
index 86ce0e1c..db43a4c5 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
@@ -186,7 +186,7 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
     private boolean mAutomaticallyTryRedgifs;
     private boolean mLongPressToHideToolbarInCompactLayout;
     private boolean mCompactLayoutToolbarHiddenByDefault;
-    private boolean mDataSavingMode;
+    private boolean mDataSavingMode = false;
     private Drawable mCommentIcon;
     private NetworkState networkState;
     private ExoCreator mExoCreator;
@@ -219,10 +219,11 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
             mShowDividerInCompactLayout = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_DIVIDER_IN_COMPACT_LAYOUT, true);
             mShowAbsoluteNumberOfVotes = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_ABSOLUTE_NUMBER_OF_VOTES, true);
             String autoplayString = sharedPreferences.getString(SharedPreferencesUtils.VIDEO_AUTOPLAY, SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_NEVER);
+            int networkType = Utils.getConnectedNetwork(activity);
             if (autoplayString.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ALWAYS_ON)) {
                 mAutoplay = true;
             } else if (autoplayString.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ON_WIFI)) {
-                mAutoplay = Utils.isConnectedToWifi(activity);
+                mAutoplay = networkType == Utils.NETWORK_TYPE_WIFI;
             }
             mAutoplayNsfwVideos = sharedPreferences.getBoolean(SharedPreferencesUtils.AUTOPLAY_NSFW_VIDEOS, true);
             mMuteAutoplayingVideos = sharedPreferences.getBoolean(SharedPreferencesUtils.MUTE_AUTOPLAYING_VIDEOS, true);
@@ -240,6 +241,13 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
             mLongPressToHideToolbarInCompactLayout = sharedPreferences.getBoolean(SharedPreferencesUtils.LONG_PRESS_TO_HIDE_TOOLBAR_IN_COMPACT_LAYOUT, false);
             mCompactLayoutToolbarHiddenByDefault = sharedPreferences.getBoolean(SharedPreferencesUtils.POST_COMPACT_LAYOUT_TOOLBAR_HIDDEN_BY_DEFAULT, false);
 
+            String dataSavingModeString = sharedPreferences.getString(SharedPreferencesUtils.DATA_SAVING_MODE, SharedPreferencesUtils.DATA_SAVING_MODE_OFF);
+            if (dataSavingModeString.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ALWAYS)) {
+                mDataSavingMode = true;
+            } else if (dataSavingModeString.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA)) {
+                mDataSavingMode = networkType == Utils.NETWORK_TYPE_CELLULAR;
+            }
+
             mPostLayout = postLayout;
 
             mColorPrimaryLightTheme = customThemeWrapper.getColorPrimaryLightTheme();
@@ -945,17 +953,23 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
     private Post.Preview getSuitablePreview(ArrayList<Post.Preview> previews) {
         Post.Preview preview;
         if (!previews.isEmpty()) {
-            preview = previews.get(0);
-            if (preview.getPreviewWidth() * preview.getPreviewHeight() >= 65 * 1000 * 1000) {
+            int previewIndex;
+            if (mDataSavingMode && previews.size() > 2) {
+                previewIndex = previews.size() / 2;
+            } else {
+                previewIndex = 0;
+            }
+            preview = previews.get(previewIndex);
+            if (preview.getPreviewWidth() * preview.getPreviewHeight() >= 75_000_000) {
                 for (int i = previews.size() - 1; i >= 1; i--) {
                     preview = previews.get(i);
                     if (mImageViewWidth >= preview.getPreviewWidth()) {
-                        if (preview.getPreviewWidth() * preview.getPreviewHeight() <= 75 * 1000 * 1000) {
+                        if (preview.getPreviewWidth() * preview.getPreviewHeight() <= 75_000_000) {
                             return preview;
                         }
                     } else {
                         int height = mImageViewWidth / preview.getPreviewWidth() * preview.getPreviewHeight();
-                        if (mImageViewWidth * height <= 75 * 1000 * 1000) {
+                        if (mImageViewWidth * height <= 75_000_000) {
                             return preview;
                         }
                     }
@@ -963,7 +977,7 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
             }
 
             int divisor = 2;
-            while (preview.getPreviewWidth() * preview.getPreviewHeight() / divisor / divisor > 75 * 1000 * 1000) {
+            while (preview.getPreviewWidth() * preview.getPreviewHeight() / divisor / divisor > 75_000_000) {
                 preview.setPreviewWidth(preview.getPreviewWidth() / divisor);
                 preview.setPreviewHeight(preview.getPreviewHeight() / divisor);
                 divisor *= 2;
@@ -1275,6 +1289,10 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
         mCompactLayoutToolbarHiddenByDefault = compactLayoutToolbarHiddenByDefault;
     }
 
+    public void setDataSavingMode(boolean dataSavingMode) {
+        mDataSavingMode = dataSavingMode;
+    }
+
     @Override
     public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
         super.onViewRecycled(holder);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeDataSavingModeEvent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeDataSavingModeEvent.java
new file mode 100644
index 00000000..2be45caf
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeDataSavingModeEvent.java
@@ -0,0 +1,9 @@
+package ml.docilealligator.infinityforreddit.Event;
+
+public class ChangeDataSavingModeEvent {
+    public String dataSavingMode;
+
+    public ChangeDataSavingModeEvent(String dataSavingMode) {
+        this.dataSavingMode = dataSavingMode;
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeNetworkStatusEvent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeNetworkStatusEvent.java
new file mode 100644
index 00000000..7fe86dee
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeNetworkStatusEvent.java
@@ -0,0 +1,9 @@
+package ml.docilealligator.infinityforreddit.Event;
+
+public class ChangeNetworkStatusEvent {
+    public int connectedNetwork;
+
+    public ChangeNetworkStatusEvent(int connectedNetwork) {
+        this.connectedNetwork = connectedNetwork;
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeWifiStatusEvent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeWifiStatusEvent.java
deleted file mode 100644
index 2c25b8c9..00000000
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeWifiStatusEvent.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package ml.docilealligator.infinityforreddit.Event;
-
-public class ChangeWifiStatusEvent {
-    public boolean isConnectedToWifi;
-    public ChangeWifiStatusEvent(boolean isConnectedToWifi) {
-        this.isConnectedToWifi = isConnectedToWifi;
-    }
-}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
index d5b638b3..0316defa 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
@@ -71,12 +71,14 @@ import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.CustomView.CustomToroContainer;
 import ml.docilealligator.infinityforreddit.Event.ChangeAutoplayNsfwVideosEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeCompactLayoutToolbarHiddenByDefaultEvent;
+import ml.docilealligator.infinityforreddit.Event.ChangeDataSavingModeEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeDefaultPostLayoutEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeEnableSwipeActionSwitchEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeLongPressToHideToolbarInCompactLayoutEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeMuteAutoplayingVideosEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeMuteNSFWVideoEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWBlurEvent;
+import ml.docilealligator.infinityforreddit.Event.ChangeNetworkStatusEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangePostLayoutEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeSavePostFeedScrolledPositionEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeShowAbsoluteNumberOfVotesEvent;
@@ -88,7 +90,6 @@ import ml.docilealligator.infinityforreddit.Event.ChangeTimeFormatEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeVibrateWhenActionTriggeredEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeVideoAutoplayEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeVoteButtonsPositionEvent;
-import ml.docilealligator.infinityforreddit.Event.ChangeWifiStatusEvent;
 import ml.docilealligator.infinityforreddit.Event.PostUpdateEventToPostList;
 import ml.docilealligator.infinityforreddit.Event.ShowDividerInCompactLayoutPreferenceEvent;
 import ml.docilealligator.infinityforreddit.Event.ShowThumbnailOnTheRightInCompactLayoutEvent;
@@ -1180,11 +1181,21 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
     }
 
     @Subscribe
-    public void onChangeWifiStatusEvent(ChangeWifiStatusEvent changeWifiStatusEvent) {
+    public void onChangeNetworkStatusEvent(ChangeNetworkStatusEvent changeNetworkStatusEvent) {
         if (mAdapter != null) {
             String autoplay = mSharedPreferences.getString(SharedPreferencesUtils.VIDEO_AUTOPLAY, SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_NEVER);
+            String dataSavingMode = mSharedPreferences.getString(SharedPreferencesUtils.DATA_SAVING_MODE, SharedPreferencesUtils.DATA_SAVING_MODE_OFF);
+            boolean stateChanged = false;
             if (autoplay.equals(SharedPreferencesUtils.VIDEO_AUTOPLAY_VALUE_ON_WIFI)) {
-                mAdapter.setAutoplay(changeWifiStatusEvent.isConnectedToWifi);
+                mAdapter.setAutoplay(changeNetworkStatusEvent.connectedNetwork == Utils.NETWORK_TYPE_WIFI);
+                stateChanged = true;
+            }
+            if (dataSavingMode.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA)) {
+                mAdapter.setDataSavingMode(changeNetworkStatusEvent.connectedNetwork == Utils.NETWORK_TYPE_CELLULAR);
+                stateChanged = true;
+            }
+
+            if (stateChanged) {
                 refreshAdapter();
             }
         }
@@ -1261,6 +1272,20 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
         swipeActionThreshold = changeSwipeActionThresholdEvent.swipeActionThreshold;
     }
 
+    @Subscribe
+    public void onChangeDataSavingModeEvent(ChangeDataSavingModeEvent changeDataSavingModeEvent) {
+        if (mAdapter != null) {
+            boolean dataSavingMode = false;
+            if (changeDataSavingModeEvent.dataSavingMode.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA)) {
+                dataSavingMode = Utils.isConnectedToCellularData(activity);
+            } else if (changeDataSavingModeEvent.dataSavingMode.equals(SharedPreferencesUtils.DATA_SAVING_MODE_ALWAYS)) {
+                dataSavingMode = true;
+            }
+            mAdapter.setDataSavingMode(dataSavingMode);
+            refreshAdapter();
+        }
+    }
+
     private void refreshAdapter() {
         int previousPosition = -1;
         if (mLinearLayoutManager != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Infinity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Infinity.java
index 04edd825..d9ee278c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Infinity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Infinity.java
@@ -15,7 +15,7 @@ import com.livefront.bridge.SavedStateHandler;
 import org.greenrobot.eventbus.EventBus;
 
 import ml.docilealligator.infinityforreddit.BroadcastReceiver.NetworkWifiStatusReceiver;
-import ml.docilealligator.infinityforreddit.Event.ChangeWifiStatusEvent;
+import ml.docilealligator.infinityforreddit.Event.ChangeNetworkStatusEvent;
 import ml.docilealligator.infinityforreddit.Utils.Utils;
 import ml.docilealligator.inifinityforreddit.EventBusIndex;
 
@@ -46,7 +46,9 @@ public class Infinity extends Application {
         EventBus.builder().addIndex(new EventBusIndex()).installDefaultEventBus();
 
         mNetworkWifiStatusReceiver =
-                new NetworkWifiStatusReceiver(() -> EventBus.getDefault().post(new ChangeWifiStatusEvent(Utils.isConnectedToWifi(getApplicationContext()))));
+                new NetworkWifiStatusReceiver(() -> {
+                    EventBus.getDefault().post(new ChangeNetworkStatusEvent(Utils.getConnectedNetwork(getApplicationContext())));
+                });
         registerReceiver(mNetworkWifiStatusReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
     }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/DataSavingModePreferenceFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/DataSavingModePreferenceFragment.java
new file mode 100644
index 00000000..b057ad3a
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Settings/DataSavingModePreferenceFragment.java
@@ -0,0 +1,29 @@
+package ml.docilealligator.infinityforreddit.Settings;
+
+import android.os.Bundle;
+
+import androidx.preference.ListPreference;
+import androidx.preference.PreferenceFragmentCompat;
+
+import org.greenrobot.eventbus.EventBus;
+
+import ml.docilealligator.infinityforreddit.Event.ChangeDataSavingModeEvent;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
+
+public class DataSavingModePreferenceFragment extends PreferenceFragmentCompat {
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        setPreferencesFromResource(R.xml.data_saving_mode_preferences, rootKey);
+
+        ListPreference dataSavingModeListPreference = findPreference(SharedPreferencesUtils.DATA_SAVING_MODE);
+
+        if (dataSavingModeListPreference != null) {
+            dataSavingModeListPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+                EventBus.getDefault().post(new ChangeDataSavingModeEvent((String) newValue));
+                return true;
+            });
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java
index 99f90024..141cceaa 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java
@@ -130,6 +130,10 @@ public class SharedPreferencesUtils {
     public static final String MUTE_NSFW_VIDEO = "mute_nsfw_video";
     public static final String VIDEO_PLAYER_IGNORE_NAV_BAR = "video_player_ignore_nav_bar";
     public static final String SAVE_FRONT_PAGE_SCROLLED_POSITION = "save_front_page_scrolled_position";
+    public static final String DATA_SAVING_MODE = "data_saving_mode";
+    public static final String DATA_SAVING_MODE_OFF = "0";
+    public static final String DATA_SAVING_MODE_ONLY_ON_CELLULAR_DATA = "1";
+    public static final String DATA_SAVING_MODE_ALWAYS = "2";
 
     public static final String MAIN_PAGE_TABS_SHARED_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit.main_page_tabs";
     public static final String MAIN_PAGE_TAB_COUNT = "_main_page_tab_count";
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 f07363d9..f3d32e5d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/Utils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Utils/Utils.java
@@ -5,7 +5,9 @@ import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.net.ConnectivityManager;
 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;
@@ -24,6 +26,9 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.SortType;
 
 public class Utils {
+    public static final int NETWORK_TYPE_OTHER = -1;
+    public static final int NETWORK_TYPE_WIFI = 0;
+    public static final int NETWORK_TYPE_CELLULAR = 1;
     private static final long SECOND_MILLIS = 1000;
     private static final long MINUTE_MILLIS = 60 * SECOND_MILLIS;
     private static final long HOUR_MILLIS = 60 * MINUTE_MILLIS;
@@ -140,13 +145,85 @@ public class Utils {
         textView.setText(html);
     }
 
+    public static int getConnectedNetwork(Context context) {
+        ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        if (connMgr != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                Network nw = connMgr.getActiveNetwork();
+                if (nw == null) return NETWORK_TYPE_OTHER;
+                NetworkCapabilities actNw = connMgr.getNetworkCapabilities(nw);
+                if (actNw != null) {
+                    if (actNw.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
+                        return NETWORK_TYPE_WIFI;
+                    }
+                    if (actNw.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
+                        return NETWORK_TYPE_CELLULAR;
+                    }
+                }
+                return NETWORK_TYPE_OTHER;
+            } else {
+                boolean isWifi = false;
+                boolean isCellular = false;
+                for (Network network : connMgr.getAllNetworks()) {
+                    NetworkInfo networkInfo = connMgr.getNetworkInfo(network);
+                    if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
+                        isWifi = true;
+                    }
+                    if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
+                        isCellular = true;
+                    }
+                }
+
+                if (isWifi) {
+                    return NETWORK_TYPE_WIFI;
+                }
+
+                if (isCellular) {
+                    return NETWORK_TYPE_CELLULAR;
+                }
+
+                return NETWORK_TYPE_OTHER;
+            }
+        }
+
+        return NETWORK_TYPE_OTHER;
+    }
+
     public static boolean isConnectedToWifi(Context context) {
         ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         if (connMgr != null) {
-            for (Network network : connMgr.getAllNetworks()) {
-                NetworkInfo networkInfo = connMgr.getNetworkInfo(network);
-                if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
-                    return networkInfo.isConnected();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                Network nw = connMgr.getActiveNetwork();
+                if (nw == null) return false;
+                NetworkCapabilities actNw = connMgr.getNetworkCapabilities(nw);
+                return actNw != null && actNw.hasTransport(NetworkCapabilities.TRANSPORT_WIFI);
+            } else {
+                for (Network network : connMgr.getAllNetworks()) {
+                    NetworkInfo networkInfo = connMgr.getNetworkInfo(network);
+                    if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
+                        return networkInfo.isConnected();
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
+
+    public static boolean isConnectedToCellularData(Context context) {
+        ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        if (connMgr != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                Network nw = connMgr.getActiveNetwork();
+                if (nw == null) return false;
+                NetworkCapabilities actNw = connMgr.getNetworkCapabilities(nw);
+                return actNw != null && actNw.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR);
+            } else {
+                for (Network network : connMgr.getAllNetworks()) {
+                    NetworkInfo networkInfo = connMgr.getNetworkInfo(network);
+                    if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
+                        return networkInfo.isConnected();
+                    }
                 }
             }
         }