Add ProgressUpdateListener

Issue: #5834
PiperOrigin-RevId: 249067445

RELEASENOTES.md

@@ -6,6 +6,8 @@
   to indicate whether a controller sent a play or only a prepare command. This
   allows to take advantage of decoder reuse with the MediaSessionConnector
   ([#5891](https://github.com/google/ExoPlayer/issues/5891)).
+* Add ProgressUpdateListener to PlayerControlView
+  ([#5834](https://github.com/google/ExoPlayer/issues/5834)).
 
 ### 2.10.1 ###
 

library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java

@@ -188,6 +188,18 @@ public class PlayerControlView extends FrameLayout {
     void onVisibilityChange(int visibility);
   }
 
+  /** Listener to be notified when progress has been updated. */
+  public interface ProgressUpdateListener {
+
+    /**
+     * Called when progress needs to be updated.
+     *
+     * @param position The current position.
+     * @param bufferedPosition The current buffered position.
+     */
+    void onProgressUpdate(long position, long bufferedPosition);
+  }
+
   /** The default fast forward increment, in milliseconds. */
   public static final int DEFAULT_FAST_FORWARD_MS = 15000;
   /** The default rewind increment, in milliseconds. */
@@ -235,7 +247,8 @@ public class PlayerControlView extends FrameLayout {
 
   @Nullable private Player player;
   private com.google.android.exoplayer2.ControlDispatcher controlDispatcher;
-  private VisibilityListener visibilityListener;
+  @Nullable private VisibilityListener visibilityListener;
+  @Nullable private ProgressUpdateListener progressUpdateListener;
   @Nullable private PlaybackPreparer playbackPreparer;
 
   private boolean isAttachedToWindow;
@@ -455,6 +468,15 @@ public class PlayerControlView extends FrameLayout {
   }
 
   /**
+   * Sets the {@link ProgressUpdateListener}.
+   *
+   * @param listener The listener to be notified about when progress is updated.
+   */
+  public void setProgressUpdateListener(@Nullable ProgressUpdateListener listener) {
+    this.progressUpdateListener = listener;
+  }
+
+  /**
    * Sets the {@link PlaybackPreparer}.
    *
    * @param playbackPreparer The {@link PlaybackPreparer}.
@@ -855,6 +877,9 @@ public class PlayerControlView extends FrameLayout {
       timeBar.setPosition(position);
       timeBar.setBufferedPosition(bufferedPosition);
     }
+    if (progressUpdateListener != null) {
+      progressUpdateListener.onProgressUpdate(position, bufferedPosition);
+    }
 
     // Cancel any pending updates and schedule a new one if necessary.
     removeCallbacks(updateProgressAction);