feat : re-impliment AccentColorExtractor

- closes : #5243

src/com/android/launcher3/widget/BaseLauncherAppWidgetHostView.java

@@ -32,7 +32,7 @@ import com.android.launcher3.util.Executors;
 /**
  * Launcher AppWidgetHostView with support for rounded corners and a fallback View.
  */
-public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHostView {
+public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHostView implements LocalColorExtractor.Listener {
 
     private static final ViewOutlineProvider VIEW_OUTLINE_PROVIDER = new ViewOutlineProvider() {
         @Override
@@ -61,6 +61,7 @@ public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHo
     };
 
     private boolean mIsCornerRadiusEnforced;
+    private final LocalColorExtractor mColorExtractor;
 
     public BaseLauncherAppWidgetHostView(Context context) {
         super(context);
@@ -70,6 +71,7 @@ public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHo
 
         mInflater = LayoutInflater.from(context);
         mEnforcedCornerRadius = RoundedCornerEnforcement.computeEnforcedRadius(getContext());
+        mColorExtractor = LocalColorExtractor.newInstance(getContext());
     }
 
     @Override
@@ -85,6 +87,18 @@ public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHo
         updateAppWidget(new RemoteViews(getAppWidgetInfo().provider.getPackageName(), 0));
     }
 
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mColorExtractor.setListener(this);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mColorExtractor.setListener(null);
+    }
+
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         try {