The launcher to always listen to app widget

Making changes to AppWidgetHost and AppWidgetHostView to make sure

  1. We could make further changes the implementation of the listener in
     launcher

  2. There is backward compatibility by making AppWidgetHostView a
     listener

Design doc: https://docs.google.com/document/d/1QpTYeOvbpGlcOLe26BtMmpaN2_rG-EC1vn4eNo89zZs/edit?usp=sharing

Test: N/A
Bug: 235358918
Change-Id: I8c3cd4eee86d93dfdeb14b0dd6d086a49e1b3b18

1 files changed, 10 insertions, 3 deletions

diff --git a/core/java/android/appwidget/AppWidgetHostView.java b/core/java/android/appwidget/AppWidgetHostView.java
index e3bca9c9aadb..fe10b7f8b3f4 100644
--- a/core/java/android/appwidget/AppWidgetHostView.java
+++ b/core/java/android/appwidget/AppWidgetHostView.java
@@ -66,7 +66,7 @@ import java.util.concurrent.Executor;
  * between updates, and will try recycling old views for each incoming
  * {@link RemoteViews}.
  */
-public class AppWidgetHostView extends FrameLayout {
+public class AppWidgetHostView extends FrameLayout implements AppWidgetHost.AppWidgetHostListener {
 
     static final String TAG = "AppWidgetHostView";
     private static final String KEY_JAILED_ARRAY = "jail";
@@ -492,8 +492,11 @@ public class AppWidgetHostView extends FrameLayout {
     /**
      * Update the AppWidgetProviderInfo for this view, and reset it to the
      * initial layout.
+     *
+     * @hide
      */
-    void resetAppWidget(AppWidgetProviderInfo info) {
+    @Override
+    public void onUpdateProviderInfo(@Nullable AppWidgetProviderInfo info) {
         setAppWidget(mAppWidgetId, info);
         mViewMode = VIEW_MODE_NOINIT;
         updateAppWidget(null);
@@ -503,6 +506,7 @@ public class AppWidgetHostView extends FrameLayout {
      * Process a set of {@link RemoteViews} coming in as an update from the
      * AppWidget provider. Will animate into these new views as needed
      */
+    @Override
     public void updateAppWidget(RemoteViews remoteViews) {
         mLastInflatedRemoteViews = remoteViews;
         applyRemoteViews(remoteViews, true);
@@ -693,8 +697,11 @@ public class AppWidgetHostView extends FrameLayout {
     /**
      * Process data-changed notifications for the specified view in the specified
      * set of {@link RemoteViews} views.
+     *
+     * @hide
      */
-    void viewDataChanged(int viewId) {
+    @Override
+    public void onViewDataChanged(int viewId) {
         View v = findViewById(viewId);
         if ((v != null) && (v instanceof AdapterView<?>)) {
             AdapterView<?> adapterView = (AdapterView<?>) v;