diff --git a/media/java/android/media/tv/TvInputService.java b/media/java/android/media/tv/TvInputService.java
index bd5a343963df7..3a40d6ff1fb40 100755
--- a/media/java/android/media/tv/TvInputService.java
+++ b/media/java/android/media/tv/TvInputService.java
@@ -592,6 +592,24 @@ public abstract class TvInputService extends Service {
             });
         }
 
+        /** @hide */
+        public void notifyTuned(@NonNull Uri channelUri) {
+            executeOrPostRunnableOnMainThread(new Runnable() {
+                @MainThread
+                @Override
+                public void run() {
+                    try {
+                        if (DEBUG) Log.d(TAG, "notifyTuned");
+                        if (mSessionCallback != null) {
+                            mSessionCallback.onTuned(channelUri);
+                        }
+                    } catch (RemoteException e) {
+                        Log.w(TAG, "error in notifyTuned", e);
+                    }
+                }
+            });
+        }
+
         /**
          * Sends the list of all audio/video/subtitle tracks. The is used by the framework to
          * maintain the track information for a given session, which in turn is used by
diff --git a/media/java/android/media/tv/interactive/TvIAppInfo.java b/media/java/android/media/tv/interactive/TvIAppInfo.java
index 79d94cce77fe1..b5245fc0856ec 100644
--- a/media/java/android/media/tv/interactive/TvIAppInfo.java
+++ b/media/java/android/media/tv/interactive/TvIAppInfo.java
@@ -127,6 +127,7 @@ public final class TvIAppInfo implements Parcelable {
     /**
      * Gets supported interactive app types
      */
+    @NonNull
     public List<String> getSupportedTypes() {
         return new ArrayList<>(mTypes);
     }
diff --git a/media/java/android/media/tv/interactive/TvIAppService.java b/media/java/android/media/tv/interactive/TvIAppService.java
index 1480ff643d993..04560415ed378 100644
--- a/media/java/android/media/tv/interactive/TvIAppService.java
+++ b/media/java/android/media/tv/interactive/TvIAppService.java
@@ -113,6 +113,19 @@ public abstract class TvIAppService extends Service {
     public static final String IAPP_SERVICE_COMMAND_TYPE_SET_STREAM_VOLUME = "set_stream_volume";
     /** @hide */
     public static final String IAPP_SERVICE_COMMAND_TYPE_SELECT_TRACK = "select_track";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_CHANNEL_URI = "command_channel_uri";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_INPUT_ID = "command_input_id";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_VOLUME = "command_volume";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_TRACK_TYPE = "command_track_type";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_TRACK_ID = "command_track_id";
+    /** @hide */
+    public static final String COMMAND_PARAMETER_KEY_TRACK_SELECT_MODE =
+            "command_track_select_mode";
 
     private final Handler mServiceHandler = new ServiceHandler();
     private final RemoteCallbackList<ITvIAppServiceCallback> mCallbacks =