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Commit c9867671 authored by Cyrus Boadway's avatar Cyrus Boadway
Browse files

Add a mechanism to temporarily defer App Widget updates 

Provides a mechanism to temporarily block app widget updates to a
particular app widget for a limited time.

Bug: 169042867
Test: manual
Change-Id: I35bf9cb4bfe99b2f371ae8fc3db09e6fcc773752
parent 5ee8b330

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

+38 −0
Original line number Diff line number Diff line
@@ -72,6 +72,8 @@ public class LauncherAppWidgetHostView extends NavigableAppWidgetHostView 


    // Maintains a list of widget ids which are supposed to be auto advanced.

    private static final SparseBooleanArray sAutoAdvanceWidgetIds = new SparseBooleanArray();

    // Maximum duration for which updates can be deferred.

    private static final long UPDATE_LOCK_TIMEOUT_MILLIS = 1000;



    protected final LayoutInflater mInflater;
@@ -110,6 +112,9 @@ public class LauncherAppWidgetHostView extends NavigableAppWidgetHostView 
            }

        }

    };

    private final Object mUpdateLock = new Object();

    private long mDeferUpdatesUntilMillis = 0;

    private RemoteViews mMostRecentRemoteViews;



    public LauncherAppWidgetHostView(Context context) {

        super(context);
@@ -165,6 +170,11 @@ public class LauncherAppWidgetHostView extends NavigableAppWidgetHostView 


    @Override

    public void updateAppWidget(RemoteViews remoteViews) {

        synchronized (mUpdateLock) {

            mMostRecentRemoteViews = remoteViews;

            if (SystemClock.uptimeMillis() < mDeferUpdatesUntilMillis) return;

        }



        super.updateAppWidget(remoteViews);



        // The provider info or the views might have changed.
@@ -198,6 +208,34 @@ public class LauncherAppWidgetHostView extends NavigableAppWidgetHostView 
        return false;

    }



    /**

     * Begin deferring the application of any {@link RemoteViews} updates made through

     * {@link #updateAppWidget(RemoteViews)} until {@link #endDeferringUpdates()} has been called or

     * the next {@link #updateAppWidget(RemoteViews)} call after {@link #UPDATE_LOCK_TIMEOUT_MILLIS}

     * have elapsed.

     */

    public void beginDeferringUpdates() {

        synchronized (mUpdateLock) {

            mDeferUpdatesUntilMillis = SystemClock.uptimeMillis() + UPDATE_LOCK_TIMEOUT_MILLIS;

        }

    }



    /**

     * Stop deferring the application of {@link RemoteViews} updates made through

     * {@link #updateAppWidget(RemoteViews)} and apply the most recently received update.

     */

    public void endDeferringUpdates() {

        RemoteViews remoteViews;

        synchronized (mUpdateLock) {

            mDeferUpdatesUntilMillis = 0;

            remoteViews = mMostRecentRemoteViews;

            mMostRecentRemoteViews = null;

        }

        if (remoteViews != null) {

            updateAppWidget(remoteViews);

        }

    }



    public boolean onInterceptTouchEvent(MotionEvent ev) {

        if (ev.getAction() == MotionEvent.ACTION_DOWN) {

            DragLayer dragLayer = mLauncher.getDragLayer();