"Play null on" displayed under media volume

-Reset package name when it is different with previous one
-Add test case

Bug: 156224161
Test: make -j50 RunSettingsRoboTests
Change-Id: Ifcacc171d86017b702f51343036e0ebf0e0d1989

src/com/android/settings/media/MediaOutputIndicatorWorker.java

@@ -81,14 +81,17 @@ public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements
         mContext.registerReceiver(mReceiver, intentFilter);
         mLocalBluetoothManager.getEventManager().registerCallback(this);
 
-        if (mLocalMediaManager == null) {
         final MediaController controller = getActiveLocalMediaController();
-            if (controller != null) {
+        if (controller == null) {
+            mPackageName = null;
+        } else {
             mPackageName = controller.getPackageName();
         }
-            mLocalMediaManager = new LocalMediaManager(mContext, mPackageName, null);
+        if (mLocalMediaManager == null || !TextUtils.equals(mPackageName,
+                mLocalMediaManager.getPackageName())) {
+            mLocalMediaManager = new LocalMediaManager(mContext, mPackageName,
+                    null /* notification */);
         }
-
         mLocalMediaManager.registerCallback(this);
         mLocalMediaManager.startScan();
     }

tests/robotests/src/com/android/settings/media/MediaOutputIndicatorWorkerTest.java

@@ -62,6 +62,8 @@ import java.util.List;
 @Config(shadows = {ShadowBluetoothAdapter.class, ShadowBluetoothUtils.class})
 public class MediaOutputIndicatorWorkerTest {
     private static final Uri URI = Uri.parse("content://com.android.settings.slices/test");
+    private static final String TEST_PACKAGE_NAME = "com.android.test";
+    private static final String TEST_PACKAGE_NAME2 = "com.android.test2";
 
     @Mock
     private BluetoothEventManager mBluetoothEventManager;
@@ -109,6 +111,33 @@ public class MediaOutputIndicatorWorkerTest {
         verify(mLocalMediaManager).startScan();
     }
 
+    @Test
+    public void onSlicePinned_packageUpdated_checkPackageName() {
+        initPlayback();
+        when(mMediaController.getPlaybackInfo()).thenReturn(mPlaybackInfo);
+        when(mMediaController.getPlaybackState()).thenReturn(mPlaybackState);
+        when(mMediaController.getPackageName()).thenReturn(TEST_PACKAGE_NAME);
+
+        mMediaOutputIndicatorWorker.onSlicePinned();
+        assertThat(mMediaOutputIndicatorWorker.mLocalMediaManager.getPackageName()).matches(
+                TEST_PACKAGE_NAME);
+
+        when(mMediaController.getPackageName()).thenReturn(TEST_PACKAGE_NAME2);
+        mMediaOutputIndicatorWorker.onSlicePinned();
+
+        assertThat(mMediaOutputIndicatorWorker.mLocalMediaManager.getPackageName()).matches(
+                TEST_PACKAGE_NAME2);
+    }
+
+    @Test
+    public void onSlicePinned_noActiveController_noPackageName() {
+        mMediaControllers.clear();
+
+        mMediaOutputIndicatorWorker.onSlicePinned();
+
+        assertThat(mMediaOutputIndicatorWorker.mLocalMediaManager.getPackageName()).isNull();
+    }
+
     @Test
     public void onSliceUnpinned_unRegisterCallback() {
         mMediaOutputIndicatorWorker.mLocalMediaManager = mLocalMediaManager;
@@ -138,6 +167,16 @@ public class MediaOutputIndicatorWorkerTest {
 
     @Test
     public void getActiveLocalMediaController_localMediaPlaying_returnController() {
+        initPlayback();
+
+        when(mMediaController.getPlaybackInfo()).thenReturn(mPlaybackInfo);
+        when(mMediaController.getPlaybackState()).thenReturn(mPlaybackState);
+
+        assertThat(mMediaOutputIndicatorWorker.getActiveLocalMediaController()).isEqualTo(
+                mMediaController);
+    }
+
+    private void initPlayback() {
         mPlaybackInfo = new MediaController.PlaybackInfo(
                 MediaController.PlaybackInfo.PLAYBACK_TYPE_LOCAL,
                 VolumeProvider.VOLUME_CONTROL_ABSOLUTE,
@@ -148,12 +187,6 @@ public class MediaOutputIndicatorWorkerTest {
         mPlaybackState = new PlaybackState.Builder()
                 .setState(PlaybackState.STATE_PLAYING, 0, 1)
                 .build();
-
-        when(mMediaController.getPlaybackInfo()).thenReturn(mPlaybackInfo);
-        when(mMediaController.getPlaybackState()).thenReturn(mPlaybackState);
-
-        assertThat(mMediaOutputIndicatorWorker.getActiveLocalMediaController()).isEqualTo(
-                mMediaController);
     }
 
     @Test