如何知道TextToSpeech何时讲完？

Question

我正在为Android应用程序使用Text to Speech.我很困惑找到一个在Text to Speech完成后调用的方法.我尝试调用以下方法,但完成后没有调用,请查看以下代码并建议我.

 tts= new TextToSpeech(MainActivity.this, new OnInitListener() {

         @Override
         public void onInit(int status) {

             tts.setOnUtteranceCompletedListener(new OnUtteranceCompletedListener() {

                @Override
                public void onUtteranceCompleted(final String utteranceId) {
                            System.out.println("Completed");

                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                        //UI changes
                        }
                    });
                }
            });

         }
        });

请建议我.我正在使用API​​ Level 17.

---

编辑:

最低API级别为12;

我在控制台中收到以下错误:

01-30 09:19:14.149: E/ActivityThread(660): Service com.android.exchange.ExchangeService

    has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40ce0ef0 that was originally bound here
01-30 09:19:14.149: E/ActivityThread(660): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40ce0ef0 that was originally bound here
01-30 09:19:14.149: E/ActivityThread(660):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
01-30 09:19:14.149: E/ActivityThread(660):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
01-30 09:19:14.149: E/ActivityThread(660):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
01-30 09:19:14.149: E/ActivityThread(660):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
01-30 09:19:14.149: E/ActivityThread(660):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:116)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
01-30 09:19:14.149: E/ActivityThread(660):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
01-30 09:19:14.149: E/ActivityThread(660):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-30 09:19:14.149: E/ActivityThread(660):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-30 09:19:14.149: E/ActivityThread(660):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-30 09:19:14.149: E/ActivityThread(660):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-30 09:19:14.149: E/ActivityThread(660):  at java.lang.Thread.run(Thread.java:856)
01-30 09:19:14.169: E/StrictMode(660): null
01-30 09:19:14.169: E/StrictMode(660): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40ce0ef0 that was originally bound here
01-30 09:19:14.169: E/StrictMode(660):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
01-30 09:19:14.169: E/StrictMode(660):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
01-30 09:19:14.169: E/StrictMode(660):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
01-30 09:19:14.169: E/StrictMode(660):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
01-30 09:19:14.169: E/StrictMode(660):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:116)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
01-30 09:19:14.169: E/StrictMode(660):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
01-30 09:19:14.169: E/StrictMode(660):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-30 09:19:14.169: E/StrictMode(660):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-30 09:19:14.169: E/StrictMode(660):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-30 09:19:14.169: E/StrictMode(660):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-30 09:19:14.169: E/StrictMode(660):  at java.lang.Thread.run(Thread.java:856)

Answer 1

问题不在于onUtteranceComplete功能,它最有可能被调用,但你正在尝试打印输出System.out,请android.utils.Log("tag", "success")改用,看看会发生什么.

此外,您需要onUtteranceComplete在调用tts.speak方法之前将UtteranceID设置为开始工作.总结一下:

            TextToSpeech tts= new TextToSpeech(MainActivity.this, new OnInitListener() {

         @Override
         public void onInit(int status) {

             tts.setOnUtteranceCompletedListener(new OnUtteranceCompletedListener() {

                @Override
                public void onUtteranceCompleted(final String utteranceId) {
                            System.out.println("Completed");

                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                        //UI changes
                        }
                    });
                }
            });

         }
    });
    Map<String,String> ttsParams = new HashMap<String, String>();
    ttsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID,
            MainActivity.this.getPackageName());

    mTts.speak(text, TextToSpeech.QUEUE_FLUSH, ttsParams);

你得到的例外与该onUtteranceComplete方法无关,如果是因为tts引擎很可能你在完成活动时没有要求销毁你的实例.

要解决这个问题

@Override
onDestroy(){
super.onDestroy();
mTts.shutdown(); //mTts is your TextToSpeech Object
}

到你的活动课