我有一个使用 TTS 读取 AsyncTask 中的文本的应用程序。我的问题是当手机进入睡眠状态时播放停止。我在该主题中经历了许多线程，所有内容都指向 WakeLock。但是我无法实现它，无论我是在活动类还是 AsyncTask 类中调用它。我使用以下代码：
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My wakelook");
wakeLock.acquire(1000);
我想问题出在 TTS 上，但目前我一无所知。也许有更多 TTS 和 WakeLock 经验的人可以帮助我。
提前致谢
编辑：
这是完整的代码（删除了不重要的部分）：
public class PlayerActivity extends Activity implements
TextToSpeech.OnInitListener {
// TTS fields
private TextToSpeech mTts;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
List<TTSPlayItem> playItems = new ArrayList<TTSPlayItem>();
TTSPlayItem playItem = new TTSPlayItem();
playItem.locale = getLocale1();
playItem.text = getText1();
playItem.position = position;
playItems.add(playItem);
playItem = new TTSPlayItem();
playItem.locale = getLocale2();
playItem.text = getText2();
playItem.position = position;
playItems.add(playItem);
TTSPlayItem[] passPlayItems = playItems
.toArray(new TTSPlayItem[playItems.size()]);
TTSAsyncTask speak = new TTSAsyncTask();
speak.execute(passPlayItems);
}
/*
* AsyncTask for TTS
*/
private class TTSAsyncTask extends
AsyncTask<TTSPlayItem, TTSPlayItem, String> {
// WakeLock
PowerManager pm;
PowerManager.WakeLock wakeLock;
protected void onPreExecute() {
}
@Override
protected String doInBackground(TTSPlayItem... items) {
pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My wakelook");
wakeLock.acquire();
for (int i = 0; i < items.length; i++) {
TTSPlayItem[] progressList = new TTSPlayItem[1];
progressList[0] = items[i];
publishProgress(progressList);
Log.i(TAG, "Play - locale: " + items[i].locale.toString()
+ ", text: " + items[i].text);
int treshold = 0;
while (true) {
int result = mTts.setLanguage(items[i].locale);
Log.i(TAG, "Locale return: " + result);
if (result == 1)
break;
if (treshold == 100)
break;
treshold++;
}
mTts.speak(items[i].text, TextToSpeech.QUEUE_FLUSH, null);
while (mTts.isSpeaking()) {
if (playing == false) {
mTts.stop();
return "Playback stopped.";
}
}
// wait
android.os.SystemClock.sleep(1000);
}
playing = false;
if (wakeLock.isHeld())
wakeLock.release();
return "Played list of " + items.length + " items.";
}
protected void onProgressUpdate(TTSPlayItem... result) {
}
protected void onPostExecute(String result) {
}
/*
* TTS methods
*/
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == MY_DATA_CHECK_CODE) {
if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
// success, create the TTS instance
mTts = new TextToSpeech(this, this);
} else {
// missing data, install it
Intent installIntent = new Intent();
installIntent
.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
}
}
}
public void shutdownTTS() {
playing = false;
// Don't forget to shutdown!
if (mTts != null) {
mTts.stop();
mTts.shutdown();
}
}
@Override
public void onDestroy() {
shutdownTTS();
super.onDestroy();
}
public void onStop() {
shutdownTTS();
super.onStop();
}
public void onPause() {
shutdownTTS();
super.onPause();
}
}