Hi all
I'm an android starter
I used MediaRecorder and MediaPlayer to record voice via mic before
This time,I try AudioRecord and AudioTrack to record voice
But when I try to start, it's forced to be shut down
I've no idea where is wrong?
here are my code ~
Could any one tell me why?
TKS in advance :)
public class audioRecorderTest2 extends Activity
{
boolean isRecording = true;
private static final String Tag = "audioRecorder";
private static final boolean log = true;
Button recordButton;
Button stopButton;
OnClickListener record_listener = null;
OnClickListener stop_listener = null;
int frequency = 8000;
int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
protected static final int MENU_ABOUT = Menu.FIRST;
protected static final int MENU_Quit = Menu.FIRST + 1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initResourceRefs();
setTitle("Audio recorder test...");
record_listener = new OnClickListener()
{
@Override
public void onClick(View arg0)
{
AudioManager am =
(AudioManager)getSystemService(Context.AUDIO_SERVICE);
//int actualBufferSize = 4096*8;
int bufferSize =
AudioTrack.getMinBufferSize(frequency,channelConfiguration,audioEncoding);
int actualBufferSize = bufferSize;//4096*8
AudioTrack audioTrack = new
AudioTrack(AudioManager.STREAM_MUSIC,
frequency,
channelConfiguration,
audioEncoding,
actualBufferSize,
AudioTrack.MODE_STREAM);
byte[] buffer = new byte[actualBufferSize];
AudioRecord audioRecord = new
AudioRecord(MediaRecorder.AudioSource.MIC,
frequency,
channelConfiguration,
audioEncoding,
actualBufferSize);
am.setRouting(AudioManager.MODE_NORMAL,
AudioManager.ROUTE_EARPIECE,
AudioManager.ROUTE_ALL);
am.setSpeakerphoneOn(true);
am.setMicrophoneMute(false);
Log.d(Tag,"Is speakerphone on? : " +
am.isSpeakerphoneOn());
audioTrack.setPlaybackRate(frequency);
audioRecord.startRecording();
audioTrack.play();
int frameSize = bufferSize;//320
while(isRecording == true)
{
try{
int bufferReadResult = audioRecord.read(buffer,
0,frameSize);
if(bufferReadResult ==
AudioRecord.ERROR_INVALID_OPERATION)
if(log)Log.d(Tag,"record.read:ERROR_INVALID_OPERATION
returned");
else if(bufferReadResult ==
AudioRecord.ERROR_BAD_VALUE)
if(log)Log.d(Tag,"record.read:ERROR_BAD_VALUE
returned");
else if(bufferReadResult != frameSize)
if(log)Log.d(Tag,"record.read:Requested
" + frameSize +
" bytes but read" +
bufferReadResult + "bytes");
else audioTrack.write(buffer,0,buffer.length);
}catch(Exception e)
{if(log)Log.e(Tag,"ERROR: " + e.toString());}
}
audioRecord.stop();
audioTrack.stop();
audioRecord.release();
audioTrack.release();
}
};//record_listener
stop_listener = new OnClickListener()
{
@Override
public void onClick(View arg0)
{
isRecording = false;
}
};//stop_listener
setListeners();
}//onCreate
private void initResourceRefs()//初始化
{
recordButton = (Button)findViewById(R.id.recordButton);
stopButton = (Button)findViewById(R.id.stopButton);
}//initResourceRefs()
private void setListeners()
{
recordButton.setOnClickListener(record_listener);
stopButton.setOnClickListener(stop_listener);
}//setListeners
}//audioRecorderTest2
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