commit 23ac9cb3e1bed8de0155f1a117739a582cb8abae
author Sunny Goyal <sunnygoyal@google.com> Thu Apr 07 12:14:37 2016 -0700
committer Sunny Goyal <sunnygoyal@google.com> Thu Apr 07 12:17:18 2016 -0700
tree 450c8a325dd9506aed890cd709de6a5aaa5fa129
parent b8b070c2dfb27d9ba168c45dd5503e89035a1139

Calling start/stop listening in onStart/onStop

AppWidgetHost in N was changed to make start/stop lisenting calls
light weight, which allows launcher to avoid getting unnecessary
updates when its not visible

Bug: 23892701
Change-Id: I0ca6e02400992bc4e0359e45a3d66b9252751402

src/com/android/launcher3/Launcher.java

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 445831c..ba5ec51 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -963,6 +963,9 @@
     protected void onStop() {
         super.onStop();
         FirstFrameAnimatorHelper.setIsVisible(false);
+        if (Utilities.isNycOrAbove()) {
+            mAppWidgetHost.stopListening();
+        }
 
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onStop();
@@ -973,6 +976,9 @@
     protected void onStart() {
         super.onStart();
         FirstFrameAnimatorHelper.setIsVisible(true);
+        if (Utilities.isNycOrAbove()) {
+            mAppWidgetHost.startListening();
+        }
 
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onStart();

src/com/android/launcher3/LauncherAppWidgetHost.java

diff --git a/src/com/android/launcher3/LauncherAppWidgetHost.java b/src/com/android/launcher3/LauncherAppWidgetHost.java
index 8c23ff3..1510558 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHost.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHost.java
@@ -82,12 +82,6 @@
         }
     }
 
-    @Override
-    public void stopListening() {
-        super.stopListening();
-        clearViews();
-    }
-
     public void addProviderChangeListener(Runnable callback) {
         mProviderChangeListeners.add(callback);
     }