Android文本到語音：onUtteranceCompleted（）未解鎖

Question

我正在從事文本到語音的應用，onUtteranceCompleted從未觸發。 這是我的一些代碼：

public class MyActivity extends Activity implements OnInitListener, OnUtteranceCompletedListener { 

     private TextToSpeech tts; 
     private HashMap<String, String> hashAudio; 

     public void onInit(int status) { 
      if (status == TextToSpeech.SUCCESS) { 

       //defining hashAudio, its music! 
       this.hashAudio = new HashMap<String, String>(); 
       this.hashAudio.put(TextToSpeech.Engine.KEY_PARAM_STREAM, String.valueOf(AudioManager.STREAM_MUSIC)); 
       this.tts.setOnUtteranceCompletedListener(this); 

       this.readEnglish(); 
      } 
     } 


    public void readEnglish(){ 
      Log.v("MESSAGE", "reading english"); //gets shown 

      this.hashAudio.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "english"); 
      this.tts.setLanguage(Locale.US); 
      this.tts.speak("TEST", TextToSpeech.QUEUE_FLUSH, this.hashAudio); 
      //gets read 
     } 

    public void onUtteranceCompleted(String uttId) { 
      Log.v("MESSAGE", "Uterrance Completed"); 
      //never see this message 
     } 

有人會知道爲什麼嗎？我已經通過幾個主題在了這裏有一些解決方案，但沒有工作:(。我也仔細閱讀了Android文檔:(。

謝謝

Answer 1

好了，所以我想通了我自己，在我的代碼的唯一問題是，HashMap的實例化後

this.tts.setOnUtteranceCompletedListener(this); 

被稱爲所以最終代碼應該是這樣的：

this.tts.setOnUtteranceCompletedListener(this); 
this.hashAudio = new HashMap<String, String>(); 
this.hashAudio.put(TextToSpeech.Engine.KEY_PARAM_STREAM,String.valueOf(AudioManager.STREAM_MUSIC));