Making it possible to determine which TTS engine is currently set

as the default by the user.

Change-Id: I513c2a9c96091320700c530346f90a9696207923

core/java/android/speech/tts/ITts.aidl

@@ -61,5 +61,7 @@ interface ITts {
 
     int playSilence(in String callingApp, in long duration, in int queueMode, in String[] params);
 
-    int setEngineByPackageName(in String enginePackageName);
+    int setEngineByPackageName(in String enginePackageName);
+
+    String getDefaultEngine();
 }

core/java/android/speech/tts/TextToSpeech.java

@@ -1340,4 +1340,43 @@ public class TextToSpeech {
         }
     }
 
+
+    /**
+     * Gets the packagename of the default speech synthesis engine.
+     *
+     * @return Packagename of the TTS engine that the user has chosen as their default.
+     *
+     * @hide
+     */
+    public String getDefaultEngine() {
+        synchronized (mStartLock) {
+            String engineName = "";
+            if (!mStarted) {
+                return engineName;
+            }
+            try {
+                engineName = mITts.getDefaultEngine();
+            } catch (RemoteException e) {
+                // TTS died; restart it.
+                Log.e("TextToSpeech.java - setEngineByPackageName", "RemoteException");
+                e.printStackTrace();
+                mStarted = false;
+                initTts();
+            } catch (NullPointerException e) {
+                // TTS died; restart it.
+                Log.e("TextToSpeech.java - setEngineByPackageName", "NullPointerException");
+                e.printStackTrace();
+                mStarted = false;
+                initTts();
+            } catch (IllegalStateException e) {
+                // TTS died; restart it.
+                Log.e("TextToSpeech.java - setEngineByPackageName", "IllegalStateException");
+                e.printStackTrace();
+                mStarted = false;
+                initTts();
+            } finally {
+                return engineName;
+            }
+        }
+    }
 }