Mega Code Archive
Audio Recording
<![CDATA[
package app.test;
import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends Activity {
private int mAudioBufferSize;
private int mAudioBufferSampleSize;
private AudioRecord mAudioRecord;
private boolean inRecordMode = false;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initAudioRecord();
}
@Override
public void onResume() {
super.onResume();
inRecordMode = true;
Thread t = new Thread(new Runnable() {
@Override
public void run() {
getSamples();
}
});
t.start();
}
protected void onPause() {
inRecordMode = false;
super.onPause();
}
@Override
protected void onDestroy() {
if(mAudioRecord != null) {
mAudioRecord.release();
}
super.onDestroy();
}
private void initAudioRecord() {
try {
int sampleRate = 8000;
int channelConfig = AudioFormat.CHANNEL_IN_MONO;
int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
mAudioBufferSize = 2 * AudioRecord.getMinBufferSize(sampleRate,
channelConfig, audioFormat);
mAudioBufferSampleSize = mAudioBufferSize / 2;
mAudioRecord = new AudioRecord(
MediaRecorder.AudioSource.MIC,
sampleRate,
channelConfig,
audioFormat,
mAudioBufferSize);
} catch (IllegalArgumentException e) {
e.printStackTrace();
}
int audioRecordState = mAudioRecord.getState();
if(audioRecordState != AudioRecord.STATE_INITIALIZED) {
finish();
}
}
private void getSamples() {
if(mAudioRecord == null) return;
short[] audioBuffer = new short[mAudioBufferSampleSize];
mAudioRecord.startRecording();
int audioRecordingState = mAudioRecord.getRecordingState();
if(audioRecordingState != AudioRecord.RECORDSTATE_RECORDING) {
finish();
}
while(inRecordMode) {
int samplesRead = mAudioRecord.read(audioBuffer, 0, mAudioBufferSampleSize);
}
mAudioRecord.stop();
}
}
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