Prevent multiple track selection dialogs in PlayerActivity.

PiperOrigin-RevId: 236119640

demos/main/src/main/java/com/google/android/exoplayer2/demo/PlayerActivity.java

@@ -126,6 +126,7 @@ public class PlayerActivity extends AppCompatActivity
   private LinearLayout debugRootView;
   private LinearLayout debugRootView;
   private Button selectTracksButton;
   private Button selectTracksButton;
   private TextView debugTextView;
   private TextView debugTextView;
+  private boolean isShowingTrackSelectionDialog;
 
 
   private DataSource.Factory dataSourceFactory;
   private DataSource.Factory dataSourceFactory;
   private SimpleExoPlayer player;
   private SimpleExoPlayer player;
@@ -293,9 +294,13 @@ public class PlayerActivity extends AppCompatActivity
 
 
   @Override
   @Override
   public void onClick(View view) {
   public void onClick(View view) {
-    if (view == selectTracksButton) {
-      TrackSelectionDialog dialog = TrackSelectionDialog.createForTrackSelector(trackSelector);
-      dialog.show(getSupportFragmentManager(), /* tag= */ null);
+    if (view == selectTracksButton && !isShowingTrackSelectionDialog) {
+      isShowingTrackSelectionDialog = true;
+      TrackSelectionDialog newDialog =
+          TrackSelectionDialog.createForTrackSelector(
+              trackSelector,
+              /* onDismissListener= */ dialog -> isShowingTrackSelectionDialog = false);
+      newDialog.show(getSupportFragmentManager(), /* tag= */ null);
     }
     }
   }
   }
 
 

demos/main/src/main/java/com/google/android/exoplayer2/demo/TrackSelectionDialog.java

@@ -63,8 +63,11 @@ public final class TrackSelectionDialog extends DialogFragment {
    * the track selector's parameters when tracks are selected.
    * the track selector's parameters when tracks are selected.
    *
    *
    * @param trackSelector A {@link DefaultTrackSelector}.
    * @param trackSelector A {@link DefaultTrackSelector}.
+   * @param onDismissListener {@link DialogInterface.OnDismissListener} called when the dialog is
+   *     dismissed.
    */
    */
-  public static TrackSelectionDialog createForTrackSelector(DefaultTrackSelector trackSelector) {
+  public static TrackSelectionDialog createForTrackSelector(
+      DefaultTrackSelector trackSelector, DialogInterface.OnDismissListener onDismissListener) {
     MappedTrackInfo mappedTrackInfo =
     MappedTrackInfo mappedTrackInfo =
         Assertions.checkNotNull(trackSelector.getCurrentMappedTrackInfo());
         Assertions.checkNotNull(trackSelector.getCurrentMappedTrackInfo());
     TrackSelectionDialog trackSelectionDialog = new TrackSelectionDialog();
     TrackSelectionDialog trackSelectionDialog = new TrackSelectionDialog();
@@ -94,7 +97,7 @@ public final class TrackSelectionDialog extends DialogFragment {
           }
           }
           trackSelector.setParameters(builder);
           trackSelector.setParameters(builder);
         },
         },
-        /* onDismissListener= */ (dialog) -> {});
+        onDismissListener);
     return trackSelectionDialog;
     return trackSelectionDialog;
   }
   }