Record audio to 3gpp file : Audio « Media « Android

1. Android
2. Media
3. Audio

Record audio to 3gpp file

   
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>

   
    
    
  

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