Stop timer when notification isn't visible

Fixes: 138261464
Test: manual, atest com.android.systemui.statusbar.notification.row.wrapper.NotificationMediaTemplateViewWrapperTest
Change-Id: Id7b1b586f3ab258fad8670070240ef951080c969
(cherry picked from commit 3c4a8e48d404649bd03ee8e6e377dcf9a65afee9)

2 files changed, 86 insertions, 8 deletions

diff --git a/core/java/com/android/internal/widget/MediaNotificationView.java b/core/java/com/android/internal/widget/MediaNotificationView.java
index e7d240a1035e..0d87afa42e3e 100644
--- a/core/java/com/android/internal/widget/MediaNotificationView.java
+++ b/core/java/com/android/internal/widget/MediaNotificationView.java
@@ -26,6 +26,8 @@ import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.RemoteViews;
 
+import java.util.ArrayList;
+
 /**
  * A TextView that can float around an image on the end.
  *
@@ -42,6 +44,7 @@ public class MediaNotificationView extends FrameLayout {
     private View mMainColumn;
     private View mMediaContent;
     private int mImagePushIn;
+    private ArrayList<VisibilityChangeListener> mListeners;
 
     public MediaNotificationView(Context context) {
         this(context, null);
@@ -168,4 +171,48 @@ public class MediaNotificationView extends FrameLayout {
         mMainColumn = findViewById(com.android.internal.R.id.notification_main_column);
         mMediaContent = findViewById(com.android.internal.R.id.notification_media_content);
     }
+
+    @Override
+    public void onVisibilityAggregated(boolean isVisible) {
+        super.onVisibilityAggregated(isVisible);
+        for (int i = 0; i < mListeners.size(); i++) {
+            mListeners.get(i).onAggregatedVisibilityChanged(isVisible);
+        }
+    }
+
+    /**
+     * Add a listener to receive updates on the visibility of this view
+     *
+     * @param listener The listener to add.
+     */
+    public void addVisibilityListener(VisibilityChangeListener listener) {
+        if (mListeners == null) {
+            mListeners = new ArrayList<>();
+        }
+        if (!mListeners.contains(listener)) {
+            mListeners.add(listener);
+        }
+    }
+
+    /**
+     * Remove the specified listener
+     *
+     * @param listener The listener to remove.
+     */
+    public void removeVisibilityListener(VisibilityChangeListener listener) {
+        if (mListeners != null) {
+            mListeners.remove(listener);
+        }
+    }
+
+    /**
+     * Interface for receiving updates when the view's visibility changes
+     */
+    public interface VisibilityChangeListener {
+        /**
+         * Method called when the visibility of this view has changed
+         * @param isVisible true if the view is now visible
+         */
+        void onAggregatedVisibilityChanged(boolean isVisible);
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationMediaTemplateViewWrapper.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationMediaTemplateViewWrapper.java
index 20e8b733ce6a..38f9bff2a63f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationMediaTemplateViewWrapper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/wrapper/NotificationMediaTemplateViewWrapper.java
@@ -39,6 +39,7 @@ import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+import com.android.internal.widget.MediaNotificationView;
 import com.android.systemui.Dependency;
 import com.android.systemui.statusbar.NotificationMediaManager;
 import com.android.systemui.statusbar.TransformableView;
@@ -67,6 +68,7 @@ public class NotificationMediaTemplateViewWrapper extends NotificationTemplateVi
     private View mSeekBarView;
     private Context mContext;
     private MetricsLogger mMetricsLogger;
+    private boolean mIsViewVisible;
 
     @VisibleForTesting
     protected SeekBar.OnSeekBarChangeListener mSeekListener =
@@ -88,11 +90,33 @@ public class NotificationMediaTemplateViewWrapper extends NotificationTemplateVi
         }
     };
 
+    MediaNotificationView.VisibilityChangeListener mVisibilityListener =
+            new MediaNotificationView.VisibilityChangeListener() {
+        @Override
+        public void onAggregatedVisibilityChanged(boolean isVisible) {
+            mIsViewVisible = isVisible;
+            if (isVisible) {
+                // Restart timer if we're currently playing and didn't already have one going
+                PlaybackState state = mMediaController.getPlaybackState();
+                if (state != null && state.getState() == PlaybackState.STATE_PLAYING
+                        && mSeekBarTimer == null && mSeekBarView != null
+                        && mSeekBarView.getVisibility() != View.GONE) {
+                    startTimer();
+                }
+            } else {
+                clearTimer();
+            }
+        }
+    };
+
     private MediaController.Callback mMediaCallback = new MediaController.Callback() {
         @Override
         public void onSessionDestroyed() {
             clearTimer();
             mMediaController.unregisterCallback(this);
+            if (mView instanceof MediaNotificationView) {
+                ((MediaNotificationView) mView).removeVisibilityListener(mVisibilityListener);
+            }
         }
 
         @Override
@@ -126,10 +150,16 @@ public class NotificationMediaTemplateViewWrapper extends NotificationTemplateVi
         mContext = ctx;
         mMediaManager = Dependency.get(NotificationMediaManager.class);
         mMetricsLogger = Dependency.get(MetricsLogger.class);
+
+        if (mView instanceof MediaNotificationView) {
+            MediaNotificationView mediaView = (MediaNotificationView) mView;
+            mediaView.addVisibilityListener(mVisibilityListener);
+        }
     }
 
     private void resolveViews() {
         mActions = mView.findViewById(com.android.internal.R.id.media_actions);
+        mIsViewVisible = mView.isShown();
 
         final MediaSession.Token token = mRow.getEntry().notification.getNotification().extras
                 .getParcelable(Notification.EXTRA_MEDIA_SESSION);
@@ -208,18 +238,19 @@ public class NotificationMediaTemplateViewWrapper extends NotificationTemplateVi
 
     private void startTimer() {
         clearTimer();
-        mSeekBarTimer = new Timer(true /* isDaemon */);
-        mSeekBarTimer.schedule(new TimerTask() {
-            @Override
-            public void run() {
-                mHandler.post(mOnUpdateTimerTick);
-            }
-        }, 0, PROGRESS_UPDATE_INTERVAL);
+        if (mIsViewVisible) {
+            mSeekBarTimer = new Timer(true /* isDaemon */);
+            mSeekBarTimer.schedule(new TimerTask() {
+                @Override
+                public void run() {
+                    mHandler.post(mOnUpdateTimerTick);
+                }
+            }, 0, PROGRESS_UPDATE_INTERVAL);
+        }
     }
 
     private void clearTimer() {
         if (mSeekBarTimer != null) {
-            // TODO: also trigger this when the notification panel is collapsed
             mSeekBarTimer.cancel();
             mSeekBarTimer.purge();
             mSeekBarTimer = null;