如何在Android Java上暂停文本到语音(How to Pause Text to Speech on Android Java)

 目前，我已经实现了文本到语音（TTS）来阅读书籍。 由于TTS只允许最多4000个字符（并且书比其更多）我将书分开并将每个部分添加到TTS队列。 我想能够点击按钮并暂停TTS，然后从用户停止的地方恢复TTS。 
 
 我已经尝试使用synthesizeToFile并暂停媒体文件对象，但是你再次只能合成一个小于4000个字符的文件。 我不希望仅为TTS在用户设备上存储数百个媒体文件。 
 
 我可以让TTS读完这本书，我不能停下来而不停止它，然后必须从书的开头开始TTS。 
 
 在下面的代码中，我将整本书存储在字符串bookText 。 TTS引擎是tts变量。 
 
 这是我加载TTS队列的方式： 
 
int position = 0;
int pos = 0;

int sizeOfChar = bookText.length();
String testString = bookText.substring(position,sizeOfChar);

int next = 500;

while(true) {
    String temp = "";

    try {
        temp = testString.substring(pos, next);
        HashMap<String, String> params = new HashMap<String, String>();
        params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, temp);
        tts.speak(temp, TextToSpeech.QUEUE_ADD, params);

        pos = pos + 500;
        next = next + 500;

    }
    catch (Exception e) {
       temp = testString.substring(pos, testString.length());
       tts.speak(temp, TextToSpeech.QUEUE_ADD, null);
       break;
    }
}
 
 这就是我“停止”TTS的方式： 
 
tts.speak("Pausing!", TextToSpeech.QUEUE_FLUSH, null);

Currently, I have implemented text to speech (TTS) to read Books. Since TTS only allows up to 4000 chars (and a book is wayyyy more than that) I split the book up and add each part to the TTS queue. I wanna be able to click a button and pause the TTS and then later resume the TTS from where the user left off.
 
I have tried using synthesizeToFile and pausing the media file object but again you can only synthesize one file at a time which is less then 4000 chars. I don't want to have hundreds of media files stored on the users device just for TTS.
 
I can make the TTS read the book, I just can't pause without stopping it and then having to start the TTS from the beginning of the book. 
 
In the code below, I have the entire book stored in a string bookText. The TTS engine is the tts variable.
 
This is how I load the TTS queue:
 
int position = 0;
int pos = 0;

int sizeOfChar = bookText.length();
String testString = bookText.substring(position,sizeOfChar);

int next = 500;

while(true) {
    String temp = "";

    try {
        temp = testString.substring(pos, next);
        HashMap<String, String> params = new HashMap<String, String>();
        params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, temp);
        tts.speak(temp, TextToSpeech.QUEUE_ADD, params);

        pos = pos + 500;
        next = next + 500;

    }
    catch (Exception e) {
       temp = testString.substring(pos, testString.length());
       tts.speak(temp, TextToSpeech.QUEUE_ADD, null);
       break;
    }
}
 
This is how I "stop" the TTS:
 
tts.speak("Pausing!", TextToSpeech.QUEUE_FLUSH, null);

原文：https://stackoverflow.com/questions/49619899