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我提到了两个链接：

从这两个链接中，我创建了一个 AppWidgetProvider 类和一个 Service 类，如下所示：

public class HomeWidget extends AppWidgetProvider{

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
        int[] appWidgetIds) {
    // TODO Auto-generated method stub
    super.onUpdate(context, appWidgetManager, appWidgetIds);
    ComponentName thisWidget = new ComponentName(context,
            HomeWidget.class);
    int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
    Intent homeIntent = new Intent(context.getApplicationContext(), VoiceService.class);
    homeIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);
    context.startService(homeIntent);
    }
}

服务：

public class VoiceService extends Service implements OnInitListener{
public static TextToSpeech mtts;
private static final String LOG = "VoiceService";
@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public void onCreate() {
    // TODO Auto-generated method stub
    super.onCreate();
    Log.d(LOG,"Service created successfully!");
    mtts = new TextToSpeech(getApplicationContext(),this);
    mtts.setLanguage(Locale.ENGLISH);
}

@Override
public void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
     if(mtts!=null)
      {
         mtts.stop();
         Log.d(LOG,"The service has been destroyed!");
    }
}

@Override
public void onStart(Intent intent, int startId) {
    // TODO Auto-generated method stub
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this
            .getApplicationContext());

    int[] allWidgetIds = intent
            .getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS);

    ComponentName thisWidget = new ComponentName(getApplicationContext(),
            HomeWidget.class);
    int[] allWidgetIds2 = appWidgetManager.getAppWidgetIds(thisWidget);
    Log.w(LOG, "From Intent" + String.valueOf(allWidgetIds.length));
    Log.w(LOG, "Direct" + String.valueOf(allWidgetIds2.length));

    for(int widgetId : allWidgetIds)
    {
        Log.w(LOG,"inside for loop");
        RemoteViews remoteViews = new RemoteViews(this
                .getApplicationContext().getPackageName(),
                R.layout.home_widget);
        mtts = new TextToSpeech(getApplicationContext(),this);
        mtts.setLanguage(Locale.ENGLISH);
        mtts.speak("This is the text to be spoken", TextToSpeech.QUEUE_FLUSH, null);

        Intent clickIntent = new Intent(this.getApplicationContext(),HomeWidget.class);
        clickIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.home, pendingIntent);
        appWidgetManager.updateAppWidget(widgetId, remoteViews);
    }
    stopSelf();
    super.onStart(intent, startId);
}

@Override
public void onInit(int status) {
    // TODO Auto-generated method stub

}

我启动了小部件，当我点击小部件时，logcat 中出现了这 6 行：

08-03 02:12:55.354: D/VoiceService(3666): Service created successfully!
08-03 02:12:55.358: W/VoiceService(3666): From Intent1
08-03 02:12:55.358: W/VoiceService(3666): Direct1
08-03 02:12:55.358: W/VoiceService(3666): inside for loop
08-03 02:12:55.358: I/TTS received:(3666): This is the text to be spoken
08-03 02:12:55.370: D/VoiceService(3666): The service has been destroyed!

但我什么也没听到。我已将音量调到最大，确保它使用的是语音合成引擎（Pico TTS）并为其安装了英语（美国）和英语（英国）。我还安装了语音合成所需的语音数据。

我还有什么遗漏或做错了什么以至于没有声音被说出来？

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1 回答 1

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在向 tts 发送任何文本之前，您必须等待初始回调，因为构造函数是一个异步操作，它会在您准备好说话之前返回。将通话移动到 onInit 调用或从 onInit 调用的内容中。

于 2012-08-03T04:22:41.067 回答