我正在服务类中编写 SpeechRecognizer 类来识别语音并在后台连续录制和播放,但是这段代码不起作用。
任何人都可以给我一个想法我该怎么做?
这是我的活动课:
public class AudioRecordTest extends Activity
{
private static final String LOG_TAG = "AudioRecordTest";
private static String mFileName = null;
//private RecordButton mRecordButton = null;
private MediaRecorder mRecorder = null;
// private PlayButton mPlayButton = null;
private MediaPlayer mPlayer = null;
Button record,play;
public static ImageView imageview;
boolean mStartRecording = false;
boolean mStartPlaying = false;
SpeechRecognizer mSpeechRecognizer;
Intent mSpeechRecognizerIntent;
@Override
public void onCreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.activity_main);
imageview=(ImageView)findViewById(R.id.imageview);
Intent serviceIntent = new Intent(this, MyService.class);
startService(serviceIntent);
}}
这是我的服务类:
public class MyService extends Service{
private static final String LOG_TAG = null;
boolean mStartRecording;
boolean mStartPlaying;
SpeechRecognizer mSpeechRecognizer;
Intent mSpeechRecognizerIntent;
private MediaRecorder mRecorder = null;
private static String mFileName = null;
private MediaPlayer mPlayer = null;
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
this.getPackageName());
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
mFileName += "/audiorecordtest.m4a";
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
protected class SpeechRecognitionListener implements RecognitionListener
{
private final String TAG = null;
@Override
public void onBeginningOfSpeech()
{
//Log.d(TAG, "onBeginingOfSpeech");
//Toast.makeText(getApplicationContext(), "Test", 5000).show();
mStartRecording=true;
AudioRecordTest.imageview.setImageResource(R.drawable.hearing);
onRecord(mStartRecording);
}
@Override
public void onBufferReceived(byte[] buffer)
{
}
@Override
public void onEndOfSpeech()
{
//Log.d(TAG, "onEndOfSpeech");
stopRecording();
mStartRecording=false;
}
@Override
public void onError(int error)
{
//Log.d(TAG, "error = " + error);
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
@Override
public void onEvent(int eventType, Bundle params)
{
}
@Override
public void onPartialResults(Bundle partialResults)
{
}
@Override
public void onReadyForSpeech(Bundle params)
{
Log.d(TAG, "onReadyForSpeech"); //$NON-NLS-1$
}
@Override
public void onResults(Bundle results)
{
//Log.d(TAG, "onResults"); //$NON-NLS-1$
//ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
// matches are the return values of speech recognition engine
// Use these values for whatever you wish to do
mStartPlaying=true;
AudioRecordTest.imageview.setImageResource(R.drawable.seak);
onPlay(mStartPlaying);
}
@Override
public void onRmsChanged(float rmsdB)
{
}
}
private void onRecord(boolean start) {
if (start) {
startRecording();
} else {
stopRecording();
}
}
private void onPlay(boolean start) {
if (start) {
startPlaying();
} else {
stopPlaying();
}
}
private void startPlaying() {
//mPlayer = new MediaPlayer();
AudioManager audioManager = (AudioManager)getSystemService(AUDIO_SERVICE);
SoundPool sp = new SoundPool(10,AudioManager.STREAM_MUSIC,0);
float actualVolume = (float) audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
float maxVolume = (float) audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int explosion = sp.load(mFileName,0);
float volume = actualVolume / maxVolume;
sp.play(explosion, volume, volume, 10, 0, 1.45f);
}
private void stopPlaying() {
mPlayer.release();
mPlayer = null;
}
private void startRecording() {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mRecorder.setOutputFile(mFileName);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
mRecorder.start();
}
private void stopRecording() {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}}