Mega Code Archive
Record audio to 3gpp file
<![CDATA[
package app.test;
import java.io.File;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
public class Test extends Activity {
private MediaPlayer mediaPlayer;
private MediaRecorder recorder;
private String OUTPUT_FILE;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
OUTPUT_FILE = Environment.getExternalStorageDirectory() +
"/recordaudio.3gpp";
}
public void doClick(View view) {
switch(view.getId()) {
case R.id.beginBtn:
try {
beginRecording();
} catch (Exception e) {
e.printStackTrace();
}
break;
case R.id.stopBtn:
try {
stopRecording();
} catch (Exception e) {
e.printStackTrace();
}
break;
case R.id.playRecordingBtn:
try {
playRecording();
} catch (Exception e) {
e.printStackTrace();
}
break;
case R.id.stopPlayingRecordingBtn:
try {
stopPlayingRecording();
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void beginRecording() throws Exception {
killMediaRecorder();
File outFile = new File(OUTPUT_FILE);
if(outFile.exists()) {
outFile.delete();
}
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(OUTPUT_FILE);
recorder.prepare();
recorder.start();
}
private void stopRecording() throws Exception {
if (recorder != null) {
recorder.stop();
}
}
private void killMediaRecorder() {
if (recorder != null) {
recorder.release();
}
}
private void killMediaPlayer() {
if (mediaPlayer != null) {
try {
mediaPlayer.release();
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void playRecording() throws Exception {
killMediaPlayer();
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(OUTPUT_FILE);
mediaPlayer.prepare();
mediaPlayer.start();
}
private void stopPlayingRecording() throws Exception {
if(mediaPlayer != null) {
mediaPlayer.stop();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
killMediaRecorder();
killMediaPlayer();
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/record.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<Button android:id="@+id/beginBtn" android:text="Begin Recording"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:onClick="doClick" />
<Button android:id="@+id/stopBtn" android:text="Stop Recording"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:onClick="doClick" />
<Button android:id="@+id/playRecordingBtn" android:text="Play Recording"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:onClick="doClick" />
<Button android:id="@+id/stopPlayingRecordingBtn"
android:text="Stop Playing Recording"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:onClick="doClick" />
</LinearLayout>
]]>