在我的应用中,我直接使用SpeechRecognizer。我在Activity的onPause上销毁了SpeechRecognizer,然后在onResume方法中重新创建它,如下所示...
public class NoUISpeechActivity extends Activity {
protected static final String CLASS_TAG = "NoUISpeechActivity";
private SpeechRecognizer sr;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_no_uispeech);
sr = getSpeechRecognizer();
}
@Override
protected void onPause() {
Log.i(CLASS_TAG, "on pause called");
if(sr!=null){
sr.stopListening();
sr.cancel();
sr.destroy();
}
super.onPause();
}
@Override
protected void onResume() {
Log.i(CLASS_TAG, "on resume called");
sr = getSpeechRecognizer();
super.onResume();
}
....
private SpeechRecognizer getSpeechRecognizer() {
if(sr == null){
sr = SpeechRecognizer.createSpeechRecognizer(getApplicationContext());
CustomRecognizerListner listner = new CustomRecognizerListner();
listner.setOnListeningCallback(new OnListeningCallbackImp());
sr.setRecognitionListener(listner);
}
return sr;
}
}
第一次通过eclipse安装应用程序时,会调用SpeechRecognition服务,并且会正确进行识别。但是当应用程序从暂停返回时,如果我尝试识别语音,则会收到“SpeechRecognition:未连接到识别服务”错误
我究竟做错了什么 ?
最佳答案
我找到了问题的原因。在onPause
方法中,虽然调用了SpeechRecognition.destroy()
方法,但我想它只是分离了服务,但对象sr
将指向某个实例,并且不会为null。将对象sr
重置为null将解决此问题。
不破坏SpeechRecognition
方法中的onPause
对象将阻止其他应用程序使用SpeechRecognition
服务
@Override
protected void onPause() {
Log.i(CLASS_TAG, "on pause called");
if(sr!=null){
sr.stopListening();
sr.cancel();
sr.destroy();
}
sr = null;
super.onPause();
}