Material You.

app/src/main/java/ml/docilealligator/infinityforreddit/adapters/PostRecyclerViewAdapter.java

@@ -30,6 +30,7 @@ import androidx.constraintlayout.widget.Barrier;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.constraintlayout.widget.ConstraintSet;
 import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.paging.PagedListAdapter;
 import androidx.paging.PagingDataAdapter;
 import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.ItemTouchHelper;
@@ -104,7 +105,7 @@ import retrofit2.Retrofit;
  * Created by alex on 2/25/18.
  */
 
-public class PostRecyclerViewAdapter extends PagingDataAdapter<Post, RecyclerView.ViewHolder> implements CacheManager {
+public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHolder> implements CacheManager {
     private static final int VIEW_TYPE_POST_CARD_VIDEO_AUTOPLAY_TYPE = 1;
     private static final int VIEW_TYPE_POST_CARD_VIDEO_AND_GIF_PREVIEW_TYPE = 2;
     private static final int VIEW_TYPE_POST_CARD_IMAGE_AND_GIF_AUTOPLAY_TYPE = 3;

app/src/main/java/ml/docilealligator/infinityforreddit/settings/ThemePreferenceFragment.java

@@ -1,11 +1,17 @@
 package ml.docilealligator.infinityforreddit.settings;
 
+import android.app.WallpaperColors;
+import android.app.WallpaperManager;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.res.Configuration;
+import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Handler;
 
+import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.app.AppCompatDelegate;
@@ -19,16 +25,19 @@ import androidx.preference.SwitchPreference;
 
 import org.greenrobot.eventbus.EventBus;
 
-import javax.inject.Inject;
+import java.util.concurrent.Executor;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import ml.docilealligator.infinityforreddit.Infinity;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.activities.CustomThemeListingActivity;
 import ml.docilealligator.infinityforreddit.activities.CustomizeThemeActivity;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeViewModel;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.events.RecreateActivityEvent;
-import ml.docilealligator.infinityforreddit.Infinity;
-import ml.docilealligator.infinityforreddit.R;
-import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.utils.CustomThemeSharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.utils.SharedPreferencesUtils;
 
@@ -44,9 +53,20 @@ public class ThemePreferenceFragment extends PreferenceFragmentCompat {
 
     private AppCompatActivity activity;
     @Inject
+    @Named("light_theme")
+    SharedPreferences lightThemeSharedPreferences;
+    @Inject
+    @Named("dark_theme")
+    SharedPreferences darkThemeSharedPreferences;
+    @Inject
+    @Named("amoled_theme")
+    SharedPreferences amoledThemeSharedPreferences;
+    @Inject
     RedditDataRoomDatabase redditDataRoomDatabase;
     @Inject
     CustomThemeWrapper customThemeWrapper;
+    @Inject
+    Executor executor;
     public CustomThemeViewModel customThemeViewModel;
 
     @Override
@@ -61,6 +81,7 @@ public class ThemePreferenceFragment extends PreferenceFragmentCompat {
         Preference customizeDarkThemePreference = findPreference(SharedPreferencesUtils.CUSTOMIZE_DARK_THEME);
         Preference customizeAmoledThemePreference = findPreference(SharedPreferencesUtils.CUSTOMIZE_AMOLED_THEME);
         Preference selectAndCustomizeThemePreference = findPreference(SharedPreferencesUtils.MANAGE_THEMES);
+        SwitchPreference enableMaterialYouSwitchPreference = findPreference(SharedPreferencesUtils.ENABLE_MATERIAL_YOU);
 
         boolean systemDefault = Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q;
         if (themePreference != null && amoledDarkSwitch != null) {
@@ -151,6 +172,70 @@ public class ThemePreferenceFragment extends PreferenceFragmentCompat {
             });
         }
 
+        if (enableMaterialYouSwitchPreference != null) {
+            Handler handler = new Handler();
+            enableMaterialYouSwitchPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    if (true) {
+                        executor.execute(() -> {
+                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+                                WallpaperManager wallpaperManager = WallpaperManager.getInstance(activity);
+                                WallpaperColors wallpaperColors = wallpaperManager.getWallpaperColors(WallpaperManager.FLAG_SYSTEM);
+
+                                if (wallpaperColors != null) {
+                                    int colorPrimaryInt = shiftColorTo255(wallpaperColors.getPrimaryColor().toArgb(), 0.4);
+                                    int colorPrimaryDarkInt = shiftColorTo0(colorPrimaryInt, 0.4);
+                                    int backgroundColor = shiftColorTo255(colorPrimaryInt, 0.6);
+                                    int cardViewBackgroundColor = shiftColorTo255(colorPrimaryInt, 0.9);
+                                    Color colorAccent = wallpaperColors.getSecondaryColor();
+                                    int colorAccentInt = shiftColorTo255(colorAccent == null ? customThemeWrapper.getColorAccent() : colorAccent.toArgb(), 0.4);
+
+                                    int colorPrimaryAppropriateTextColor = getAppropriateTextColor(colorPrimaryInt);
+                                    int backgroundColorAppropriateTextColor = getAppropriateTextColor(backgroundColor);
+
+                                    lightThemeSharedPreferences.edit().putInt(CustomThemeSharedPreferencesUtils.COLOR_PRIMARY, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_PRIMARY_DARK, colorPrimaryDarkInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_ACCENT, colorAccentInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_PRIMARY_LIGHT_THEME, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.BACKGROUND_COLOR, backgroundColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.CARD_VIEW_BACKGROUND_COLOR, cardViewBackgroundColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.BOTTOM_APP_BAR_BACKGROUND_COLOR, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.NAV_BAR_COLOR, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.PRIMARY_TEXT_COLOR, backgroundColorAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.BOTTOM_APP_BAR_ICON_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.PRIMARY_ICON_COLOR, backgroundColorAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.FAB_ICON_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TOOLBAR_PRIMARY_TEXT_AND_ICON_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TOOLBAR_SECONDARY_TEXT_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_COLLAPSED_COLLAPSING_TOOLBAR_TAB_INDICATOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_COLLAPSED_COLLAPSING_TOOLBAR_TEXT_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_COLLAPSED_COLLAPSING_TOOLBAR_TAB_BACKGROUND, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_EXPANDED_COLLAPSING_TOOLBAR_TAB_BACKGROUND, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_EXPANDED_COLLAPSING_TOOLBAR_TAB_INDICATOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.TAB_LAYOUT_WITH_EXPANDED_COLLAPSING_TOOLBAR_TEXT_COLOR, colorPrimaryAppropriateTextColor)
+                                            .putInt(CustomThemeSharedPreferencesUtils.CIRCULAR_PROGRESS_BAR_BACKGROUND, colorPrimaryInt)
+                                            .putBoolean(CustomThemeSharedPreferencesUtils.LIGHT_STATUS_BAR, getAppropriateTextColor(colorPrimaryDarkInt) == Color.toArgb(Color.BLACK))
+                                            .apply();
+                                    darkThemeSharedPreferences.edit()
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_ACCENT, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_PRIMARY_LIGHT_THEME, colorPrimaryInt)
+                                            .apply();
+                                    amoledThemeSharedPreferences.edit()
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_ACCENT, colorPrimaryInt)
+                                            .putInt(CustomThemeSharedPreferencesUtils.COLOR_PRIMARY_LIGHT_THEME, colorPrimaryInt)
+                                            .apply();
+
+                                    handler.post(() -> EventBus.getDefault().post(new RecreateActivityEvent()));
+                                }
+                            }
+                        });
+                    }
+                    return true;
+                }
+            });
+        }
+
         customThemeViewModel = new ViewModelProvider(this,
                 new CustomThemeViewModel.Factory(redditDataRoomDatabase))
                 .get(CustomThemeViewModel.class);
@@ -186,6 +271,28 @@ public class ThemePreferenceFragment extends PreferenceFragmentCompat {
         });
     }
 
+    private int shiftColorTo255(int color, double ratio) {
+        int offset = (int) (Math.min(Math.min(255 - Color.red(color), 255 - Color.green(color)), 255 - Color.blue(color)) * ratio);
+        return Color.argb(Color.alpha(color), Color.red(color) + offset,
+                Color.green(color) + offset,
+                Color.blue(color) + offset);
+    }
+
+    private int shiftColorTo0(int color, double ratio) {
+        int offset = (int) (Math.min(Math.min(Color.red(color), Color.green(color)), Color.blue(color)) * ratio);
+        return Color.argb(Color.alpha(color), Color.red(color) - offset,
+                Color.green(color) - offset,
+                Color.blue(color) - offset);
+
+    }
+
+    @ColorInt
+    public int getAppropriateTextColor(@ColorInt int color) {
+        // Counting the perceptive luminance - human eye favors green color...
+        double luminance = 1 - (0.299 * Color.red(color) + 0.587 * Color.green(color) + 0.114 * Color.blue(color)) / 255;
+        return luminance < 0.5 ? Color.BLACK : Color.WHITE;
+    }
+
     @Override
     public void onAttach(@NonNull Context context) {
         super.onAttach(context);

app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java

@@ -180,6 +180,7 @@ public class SharedPreferencesUtils {
     public static final String NUMBER_OF_COLUMNS_IN_POST_FEED_LANDSCAPE_CARD_LAYOUT_2 = "number_of_columns_in_post_feed_landscape_card_layout_2";
     public static final String DISABLE_NSFW_FOREVER = "disable_nsfw_forever";
     public static final String SHOW_ONLY_ONE_COMMENT_LEVEL_INDICATOR = "show_only_one_comment_level_indicator";
+    public static final String ENABLE_MATERIAL_YOU = "enable_material_you";
 
     public static final String DEFAULT_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit_preferences";
     public static final String MAIN_PAGE_TABS_SHARED_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit.main_page_tabs";

app/src/main/res/values/strings.xml

@@ -457,6 +457,9 @@
     <string name="settings_customize_dark_theme_title">Dark Theme</string>
     <string name="settings_customize_amoled_theme_title">Amoled Theme</string>
     <string name="settings_manage_themes_title">Manage Themes</string>
+    <string name="settings_category_material_you_title">Material You</string>
+    <string name="settings_enable_material_you_title">Enable Material You</string>
+    <string name="settings_enable_material_you_summary">Personalize Infinity based on Your Wallpaper</string>
     <string name="settings_custom_theme_cannot_apply_to_settings_page_summary">Custom themes cannot be applied to settings page (except toolbar, status bar and navigation bar).</string>
     <string name="settings_advanced_master_title">Advanced</string>
     <string name="settings_delete_all_subreddits_data_in_database_title">Delete All Subreddits in Database</string>

app/src/main/res/xml/theme_preferences.xml

@@ -40,6 +40,15 @@
         app:icon="@drawable/ic_edit_24dp"
         app:title="@string/settings_manage_themes_title" />
 
+    <PreferenceCategory
+        app:title="@string/settings_category_material_you_title" />
+
+    <SwitchPreference
+        app:defaultValue="false"
+        app:key="enable_material_you"
+        app:title="@string/settings_enable_material_you_title"
+        app:summary="@string/settings_enable_material_you_summary" />
+
     <Preference
         app:icon="@drawable/ic_info_preference_24dp"
         app:summary="@string/settings_custom_theme_cannot_apply_to_settings_page_summary"