Don't resume after call ends until gain audio focus

this patch can fix below two issues.
1) after call ends, telephony will still play call end tone.
so we should not resume fm immediately after call ends.
2) if fm has been paused and abandoned audiofocus because
other video app starts to play and sends pause cmd to fm,
then after call ends, we should not resume fm automatically.

we should only resmue fm after fm gains audio focus.

Change-Id: I729ac3e92512ff43368494ecde87d3d9f8dfe2c6
CRs-Fixed: 1110621

fmapp2/src/com/caf/fmradio/FMRadioService.java

@@ -156,7 +156,7 @@ public class FMRadioService extends Service
    private File mA2DPSampleFile = null;
    //Track FM playback for reenter App usecases
    private boolean mPlaybackInProgress = false;
-   private boolean mStoppedOnFocusLoss = false;
+   private boolean mStoppedOnFocusLoss = true;
    private boolean mStoppedOnFactoryReset = false;
    private File mSampleFile = null;
    long mSampleStart = 0;
@@ -1053,6 +1053,7 @@ public class FMRadioService extends Service
            return;
        }
 
+       if (mStoppedOnFocusLoss) {
            AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            int granted = audioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC,
                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
@@ -1060,6 +1061,7 @@ public class FMRadioService extends Service
                Log.d(LOGTAG, "audio focuss couldnot be granted");
                return;
            }
+       }
        mSession.setActive(true);
 
        Log.d(LOGTAG,"FM registering for registerMediaButtonEventReceiver");
@@ -1442,6 +1444,32 @@ public class FMRadioService extends Service
        resolver.insert(uri, values);
    }
 
+    private void resumeAfterCall() {
+        if (getCallState() != TelephonyManager.CALL_STATE_IDLE)
+            return;
+
+        // start playing again
+        if (!mResumeAfterCall)
+            return;
+
+        // resume playback only if FM Radio was playing
+        // when the call was answered
+        if (isAntennaAvailable() && (!isFmOn()) && mServiceInUse) {
+            Log.d(LOGTAG, "Resuming after call:");
+            if(!fmOn()) {
+                return;
+            }
+            mResumeAfterCall = false;
+            if (mCallbacks != null) {
+                try {
+                    mCallbacks.onEnabled();
+                } catch (RemoteException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
    private void fmActionOnCallState( int state ) {
    //if Call Status is non IDLE we need to Mute FM as well stop recording if
    //any. Similarly once call is ended FM should be unmuted.
@@ -1473,49 +1501,6 @@ public class FMRadioService extends Service
                mMuted = bTempMute;
            }
        }
-       else if (state == TelephonyManager.CALL_STATE_IDLE) {
-          // start playing again
-          if (mResumeAfterCall)
-          {
-             // resume playback only if FM Radio was playing
-             // when the call was answered
-              if (isAntennaAvailable() && (!isFmOn()) && mServiceInUse)
-              {
-                   Log.d(LOGTAG, "Resuming after call:");
-                   do {
-                       granted = audioManager.requestAudioFocus(mAudioFocusListener,
-                               AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
-                       ++count;
-                       try {
-                           Thread.sleep(100);
-                       } catch (Exception ex) {
-                           Log.d( LOGTAG, "InterruptedException");
-                       }
-                   } while(granted != AudioManager.AUDIOFOCUS_REQUEST_GRANTED && count != 3);
-
-                   if(true != fmOn()) {
-                       return;
-                   }
-
-                   mResumeAfterCall = false;
-                   if(mCallbacks != null) {
-                      try {
-                           mCallbacks.onEnabled();
-                      } catch (RemoteException e) {
-                           e.printStackTrace();
-                      }
-                   }
-              }
-          } else {
-              if (!isFmOn() && (mServiceInUse) && (mCallbacks != null)) {
-                  try {
-                      mCallbacks.onDisabled();
-                  } catch (RemoteException e) {
-                      e.printStackTrace();
-                  }
-              }
-          }
-       }//idle
    }
 
     /* Handle Phone Call + FM Concurrency */
@@ -1590,7 +1575,7 @@ public class FMRadioService extends Service
               stopRecording();
               break;
           case FOCUSCHANGE:
-              if( false == isFmOn() ) {
+              if( !isFmOn() && !mResumeAfterCall) {
                   Log.v(LOGTAG, "FM is not running, not handling change");
                   return;
               }
@@ -1604,8 +1589,8 @@ public class FMRadioService extends Service
                       Log.v(LOGTAG, "AudioFocus: received AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK");
                       if (true == mPlaybackInProgress) {
                           stopFM();
-                          mStoppedOnFocusLoss = true;
                       }
+                      mStoppedOnFocusLoss = true;
                       break;
                   case AudioManager.AUDIOFOCUS_LOSS:
                       Log.v(LOGTAG, "AudioFocus: received AUDIOFOCUS_LOSS");
@@ -1631,9 +1616,14 @@ public class FMRadioService extends Service
                       break;
                   case AudioManager.AUDIOFOCUS_GAIN:
                       Log.v(LOGTAG, "AudioFocus: received AUDIOFOCUS_GAIN");
+                      mStoppedOnFocusLoss = false;
+                      if (mResumeAfterCall) {
+                          Log.v(LOGTAG, "resumeAfterCall");
+                          resumeAfterCall();
+                          break;
+                      }
                       if(false == mPlaybackInProgress)
                           startFM();
-                      mStoppedOnFocusLoss = false;
                       mSession.setActive(true);
                       break;
                   default:
@@ -2263,7 +2253,12 @@ public class FMRadioService extends Service
          Log.d(LOGTAG, "audioManager.setFmRadioOn = false \n" );
          stopFM();
          unMute();
+         // If call is active, we will use audio focus to resume fm after call ends.
+         // So don't abandon audiofocus automatically
+         if (getCallState() == TelephonyManager.CALL_STATE_IDLE) {
              audioManager.abandonAudioFocus(mAudioFocusListener);
+             mStoppedOnFocusLoss = true;
+         }
          //audioManager.setParameters("FMRadioOn=false");
          Log.d(LOGTAG, "audioManager.setFmRadioOn false done \n" );
       }
@@ -3832,7 +3827,7 @@ public class FMRadioService extends Service
    }
    private void requestFocus() {
       if( (false == mPlaybackInProgress) &&
-          (true  == mStoppedOnFocusLoss) ) {
+          (true  == mStoppedOnFocusLoss) && isFmOn()) {
            // adding code for audio focus gain.
            AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            audioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC,