Fix a couple regressions from resetting AppsCustomizeTabHost

Bug 18409435
Bug 18358080

Change-Id: I07a071342b5c5e062ab2bb562b672d93ba0d5c2e

src/com/android/launcher3/AppsCustomizePagedView.java

@@ -839,6 +839,12 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
         cancelAllTasks();
     }
 
+    @Override
+    public void trimMemory() {
+        super.trimMemory();
+        clearAllWidgetPages();
+    }
+
     public void clearAllWidgetPages() {
         cancelAllTasks();
         int count = getChildCount();
@@ -1472,9 +1478,7 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
         }
     }
 
-    @Override
     public void reset() {
-        super.reset();
         // If we have reset, then we should not continue to restore the previous state
         mSaveInstanceStateItemIndex = -1;
 

src/com/android/launcher3/AppsCustomizeTabHost.java

@@ -118,6 +118,10 @@ public class AppsCustomizeTabHost extends FrameLayout implements LauncherTransit
         mPagedView.reset();
     }
 
+    void trimMemory() {
+        mPagedView.trimMemory();
+    }
+
     public void onWindowVisible() {
         if (getVisibility() == VISIBLE) {
             mContent.setVisibility(VISIBLE);

src/com/android/launcher3/Launcher.java

@@ -3815,10 +3815,9 @@ public class Launcher extends Activity
             // 3MB of memory for caching which isn't necessary.
             SQLiteDatabase.releaseMemory();
 
-            // We reset the apps customize tray in order to
+            // This clears all widget bitmaps from the widget tray
-            // to free all the memory associated with widget previews
             if (mAppsCustomizeTabHost != null) {
-                mAppsCustomizeTabHost.reset();
+                mAppsCustomizeTabHost.trimMemory();
             }
         }
     }

src/com/android/launcher3/PagedViewWithDraggableItems.java

@@ -91,7 +91,7 @@ public abstract class PagedViewWithDraggableItems extends PagedView
         return super.onTouchEvent(ev);
     }
 
-    public void reset() {
+    public void trimMemory() {
         mLastTouchedItem = null;
     }