From 118f0b39381c9f5a3eb9f1b72ff211eddeb9eae8 Mon Sep 17 00:00:00 2001
From: gyumin <gyumin@google.com>
Date: Tue, 21 Apr 2020 05:09:38 +0100
Subject: [PATCH] Prevent StreamVolumeManager from being released twice

PiperOrigin-RevId: 307534335
---
 .../com/google/android/exoplayer2/StreamVolumeManager.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/StreamVolumeManager.java b/library/core/src/main/java/com/google/android/exoplayer2/StreamVolumeManager.java
index 59ab3f1616..66216de861 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/StreamVolumeManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/StreamVolumeManager.java
@@ -53,6 +53,7 @@ import com.google.android.exoplayer2.util.Util;
   @C.StreamType private int streamType;
   private int volume;
   private boolean muted;
+  private boolean released;
 
   /** Creates a manager. */
   public StreamVolumeManager(Context context, Handler eventHandler, Listener listener) {
@@ -158,7 +159,11 @@ import com.google.android.exoplayer2.util.Util;
 
   /** Releases the manager. It must be called when the manager is no longer required. */
   public void release() {
+    if (released) {
+      return;
+    }
     applicationContext.unregisterReceiver(receiver);
+    released = true;
   }
 
   private void updateVolumeAndNotifyIfChanged() {