Simple examples of Android programming development recording and playback recording

/*
 * The application needs to have the permission to write to external storage
 * if the output file is written to the external storage, and also the
 * permission to record audio. These permissions must be set in the
 * application's  file, with something like:
 *
 * <uses-permission android:name=".WRITE_EXTERNAL_STORAGE" />
 * <uses-permission android:name=".RECORD_AUDIO" />
 *
 */
package ;
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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;
  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();
    try {
      (mFileName);
      ();
      ();
    } catch (IOException e) {
      (LOG_TAG, "prepare() failed");
    }
  }
  private void stopPlaying() {
    ();
    mPlayer = null;
  }
  private void startRecording() {
    mRecorder = new MediaRecorder();
    ();
    (.THREE_GPP);
    (mFileName);
    (.AMR_NB);
    try {
      ();
    } catch (IOException e) {
      (LOG_TAG, "prepare() failed");
    }
    ();
  }
  private void stopRecording() {
    ();
    ();
    mRecorder = null;
  }
  class RecordButton extends Button {
    boolean mStartRecording = true;
    OnClickListener clicker = new OnClickListener() {
      public void onClick(View v) {
        onRecord(mStartRecording);
        if (mStartRecording) {
          setText("Stop recording");
        } else {
          setText("Start recording");
        }
        mStartRecording = !mStartRecording;
      }
    };
    public RecordButton(Context ctx) {
      super(ctx);
      setText("Start recording");
      setOnClickListener(clicker);
    }
  }
  class PlayButton extends Button {
    boolean mStartPlaying = true;
    OnClickListener clicker = new OnClickListener() {
      public void onClick(View v) {
        onPlay(mStartPlaying);
        if (mStartPlaying) {
          setText("Stop playing");
        } else {
          setText("Start playing");
        }
        mStartPlaying = !mStartPlaying;
      }
    };
    public PlayButton(Context ctx) {
      super(ctx);
      setText("Start playing");
      setOnClickListener(clicker);
    }
  }
  public AudioRecordTest() {
    mFileName = ().getAbsolutePath();
    mFileName += "/audiorecordtest.3gp";
  }
  @Override
  public void onCreate(Bundle icicle) {
    (icicle);
    LinearLayout ll = new LinearLayout(this);
    mRecordButton = new RecordButton(this);
    (mRecordButton,
      new (
        .WRAP_CONTENT,
        .WRAP_CONTENT,
        0));
    mPlayButton = new PlayButton(this);
    (mPlayButton,
      new (
        .WRAP_CONTENT,
        .WRAP_CONTENT,
        0));
    setContentView(ll);
  }
  @Override
  public void onPause() {
    ();
    if (mRecorder != null) {
      ();
      mRecorder = null;
    }
    if (mPlayer != null) {
      ();
      mPlayer = null;
    }
  }
}