Android: Fix issue with AndroidHarness trying to pause audio after app.stop() closed down the audio renderer

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10728 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/android/com/jme3/audio/android/AndroidOpenALSoftAudioRenderer.java

@@ -71,6 +71,7 @@ public class AndroidOpenALSoftAudioRenderer implements AndroidAudioRenderer, Run
     private static final float UPDATE_RATE = 0.05f;
     private final Thread audioThread = new Thread(this, "jME3 Audio Thread");
     private final AtomicBoolean threadLock = new AtomicBoolean(false);
+    private boolean initialized = false;
 
     public AndroidOpenALSoftAudioRenderer() {
     }
@@ -98,6 +99,8 @@ public class AndroidOpenALSoftAudioRenderer implements AndroidAudioRenderer, Run
             threadLock.notifyAll();
         }
 
+        initialized = true;
+
         long updateRateNanos = (long) (UPDATE_RATE * 1000000000);
         mainloop:
         while (true) {
@@ -126,6 +129,8 @@ public class AndroidOpenALSoftAudioRenderer implements AndroidAudioRenderer, Run
             }
         }
 
+        initialized = false;
+
         synchronized (threadLock) {
             cleanupInThread();
         }
@@ -1292,6 +1297,12 @@ public class AndroidOpenALSoftAudioRenderer implements AndroidAudioRenderer, Run
     }
 
     public void pauseAll() {
+        // don't try to pause all audio (mainly from Android activity) if
+        //   the renderer is already closed down
+        if (!initialized) {
+            return;
+        }
+
         checkDead();
         synchronized (threadLock) {
             while (!threadLock.get()) {