Merge "A11y fix for all widgets tray (Part 2 / n)" into sc-dev

src/com/android/launcher3/widget/picker/WidgetsFullSheet.java

@@ -577,6 +577,7 @@ public class WidgetsFullSheet extends BaseWidgetSheet
                     apps.getIconCache(),
                     /* iconClickListener= */ WidgetsFullSheet.this,
                     /* iconLongClickListener= */ WidgetsFullSheet.this);
+            mWidgetsListAdapter.setHasStableIds(true);
             switch (mAdapterType) {
                 case PRIMARY:
                     mWidgetsListAdapter.setFilter(mPrimaryWidgetsFilter);
@@ -592,6 +593,8 @@ public class WidgetsFullSheet extends BaseWidgetSheet
         void setup(WidgetsRecyclerView recyclerView) {
             mWidgetsRecyclerView = recyclerView;
             mWidgetsRecyclerView.setAdapter(mWidgetsListAdapter);
+            // Disables animation because it disrupts the item focus upon adapter item change.
+            mWidgetsRecyclerView.setItemAnimator(null);
             mWidgetsRecyclerView.setHeaderViewDimensionsProvider(WidgetsFullSheet.this);
             mWidgetsRecyclerView.setEdgeEffectFactory(
                     ((TopRoundedCornerView) mContent).createEdgeEffectFactory());

src/com/android/launcher3/widget/picker/WidgetsListAdapter.java

@@ -43,6 +43,7 @@ import com.android.launcher3.widget.model.WidgetsListHeaderEntry;
 import com.android.launcher3.widget.model.WidgetsListSearchHeaderEntry;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
 import java.util.function.Predicate;
@@ -216,7 +217,9 @@ public class WidgetsListAdapter extends Adapter<ViewHolder> implements OnHeaderC
 
     @Override
     public long getItemId(int pos) {
-        return pos;
+        return Arrays.hashCode(new Object[]{
+                mVisibleEntries.get(pos).mPkgItem.hashCode(),
+                getItemViewType(pos)});
     }
 
     @Override