From e3576294000a42d05bd5cbb6cc47f9605eff9cee Mon Sep 17 00:00:00 2001
From: claincly <claincly@google.com>
Date: Tue, 26 Nov 2024 03:30:57 -0800
Subject: [PATCH] Make back button pause player instead of quitting app

PiperOrigin-RevId: 700282443
---
 .../demo/composition/CompositionPreviewActivity.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/demos/composition/src/main/java/androidx/media3/demo/composition/CompositionPreviewActivity.java b/demos/composition/src/main/java/androidx/media3/demo/composition/CompositionPreviewActivity.java
index 483bed852e..7fbf831d17 100644
--- a/demos/composition/src/main/java/androidx/media3/demo/composition/CompositionPreviewActivity.java
+++ b/demos/composition/src/main/java/androidx/media3/demo/composition/CompositionPreviewActivity.java
@@ -191,6 +191,18 @@ public final class CompositionPreviewActivity extends AppCompatActivity {
     exportStopwatch.reset();
   }
 
+  @SuppressWarnings("MissingSuperCall")
+  @Override
+  public void onBackPressed() {
+    if (compositionPlayer != null) {
+      compositionPlayer.pause();
+    }
+    if (exportStopwatch.isRunning()) {
+      cancelExport();
+      exportStopwatch.reset();
+    }
+  }
+
   private Composition prepareComposition() {
     String[] presetUris = getResources().getStringArray(/* id= */ R.array.preset_uris);
     int[] presetDurationsUs = getResources().getIntArray(/* id= */ R.array.preset_durations);