我希望 setOnUtteranceProgressListener
应该在语音完成后通知一个 Toast
。它似乎不起作用。
我使用了 setOnUtteranceProgressListener
并且在 speak 函数中我提到了 paramaters
如下..
Bundle params = new Bundle();
params.putString(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, MainActivity.this.getPackageName());
我在调用 speak 函数时给出了一个“UniqueId”,如下所示。
myTTS.speak(message,TextToSpeech.QUEUE_FLUSH,params,"UniqueId");
在我的程序
中,文本到语音引擎完成朗读后,它应该运行一个 Toast 通知它已经完成朗读。但是 setOnUtteranceProgressListner
似乎不起作用。
myTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
@Override
public void onStart(String utteranceId) {
}
@Override
public void onDone(String utteranceId) {
Toast.makeText(MainActivity.this,"Finished speaking.",Toast.LENGTH_LONG).show();
}
@Override
public void onError(String utteranceId) {
}
});
全部代码如下..
public class MainActivity extends AppCompatActivity {
String message;
private TextToSpeech myTTS;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myTTS = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(myTTS.getEngines().size() == 0){
Toast.makeText(MainActivity.this,"No Engines Installed",Toast.LENGTH_LONG).show();
}else{
myTTS.setLanguage(Locale.US);
if (status == TextToSpeech.SUCCESS){
//Toast.makeText(MainActivity.this,"Status working.",Toast.LENGTH_LONG).show();
message = "How may i help you.";
}
}
}
});
myTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
@Override
public void onStart(String utteranceId) {
}
@Override
public void onDone(String utteranceId) {
Toast.makeText(MainActivity.this,"onDone working.",Toast.LENGTH_LONG).show();
}
@Override
public void onError(String utteranceId) {
}
});
}
请给出解决方案。
最佳答案
主要问题是:
1) 在tts初始化前设置进度监听。
2) 尝试从后台线程制作 Toast。
我还有一些其他建议的更改,但它们不是必需的:
public class MainActivity extends AppCompatActivity {
String message = "How may I help you?";
String mostRecentUtteranceID;
private TextToSpeech myTTS;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myTTS = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(myTTS.getEngines().size() == 0){
Toast.makeText(MainActivity.this,"No Engines Installed",Toast.LENGTH_LONG).show();
}else{
if (status == TextToSpeech.SUCCESS){
ttsInitialized();
}
}
}
});
}
private void ttsInitialized() {
// *** set UtteranceProgressListener AFTER tts is initialized ***
myTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
@Override
public void onStart(String utteranceId) {
}
@Override
// this method will always called from a background thread.
public void onDone(String utteranceId) {
// only respond to the most recent utterance
if (!utteranceId.equals(mostRecentUtteranceID)) {
Log.i("XXX", "onDone() blocked: utterance ID mismatch.");
return;
} // else continue...
boolean wasCalledFromBackgroundThread = (Thread.currentThread().getId() != 1);
Log.i("XXX", "was onDone() called on a background thread? : " + wasCalledFromBackgroundThread);
Log.i("XXX", "onDone working.");
// for demonstration only... avoid references to
// MainActivity (unless you use a WeakReference)
// inside the onDone() method, as it
// can cause a memory leak.
runOnUiThread(new Runnable() {
@Override
public void run() {
// *** toast will not work if called from a background thread ***
Toast.makeText(MainActivity.this,"onDone working.",Toast.LENGTH_LONG).show();
}
});
}
@Override
public void onError(String utteranceId) {
}
});
// set Language
myTTS.setLanguage(Locale.US);
// set unique utterance ID for each utterance
mostRecentUtteranceID = (new Random().nextInt() % 9999999) + ""; // "" is String force
// set params
// *** this method will work for more devices: API 19+ ***
HashMap<String, String> params = new HashMap<>();
params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, mostRecentUtteranceID);
myTTS.speak(message,TextToSpeech.QUEUE_FLUSH,params);
}
}
关于java - setOnUtteranceProgressListener 根本不适用于 API > 21 的文本转语音,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52233235/