Android Open Source - MobileCodeGenerator Audio Recorder Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

package it.polimi.multimedia;
// ww w  .j a  v  a 2  s  .c o  m
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.os.*;
import android.app.*;
import android.content.*;
import android.content.res.*;
import android.graphics.Bitmap;
import android.view.*;
import android.view.View.*;
import android.widget.*;
import android.widget.AdapterView.*;
import android.webkit.*;
import android.location.*;
import android.net.Uri;
import android.provider.MediaStore;
import android.media.*;

public class AudioRecorderActivity extends MenuActivity {
  private Button playButton;
  private Button pauseButton;
  private Button stopButton;
  private MediaPlayer audioPlayer;
  private Button recordButton;
  private MediaRecorder audioRecorder;
  private String recordedAudioPath;
  private boolean isRecording = false;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_audiorecorder);

  }

  @Override
  protected void onStart() {
    //TODO Auto-generated method stub
    super.onStart();
  }

  @Override
  protected void onResume() {
    //TODO Auto-generated method stub
    super.onResume();
    recordButton = (Button) this
        .findViewById(R.id.audioRecorderRecordButton);
    recordButton.setText("Rec");
    recordButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        if (!isRecording) { //start recording
          String audiosPath = getFilesDir().getAbsolutePath()
              + "/audios";
          File audiosDirectory = new File(audiosPath);
          audiosDirectory.mkdir();
          String filename = new SimpleDateFormat(
              "yyyy-MM-dd_HH-mm-ss").format(new Date()) + ".mp3";
          String localAudioPath = audiosPath + "/" + filename;
          recordedAudioPath = localAudioPath;

          audioRecorder = new MediaRecorder();
          audioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
          audioRecorder
              .setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
          audioRecorder.setOutputFile(recordedAudioPath);
          audioRecorder
              .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
          try {
            audioRecorder.prepare();
            audioRecorder.start();
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
          recordButton.setText("Stop");
        } else { //stop recording
          audioRecorder.stop();
          audioRecorder.release();
          audioRecorder = null;
          try {
            audioPlayer = new MediaPlayer();
            audioPlayer.setDataSource(new FileInputStream(
                recordedAudioPath).getFD());
            audioPlayer.prepare();
          } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
          recordButton.setText("Rec");
        }
        isRecording = !isRecording;
      }
    });
    this.playButton = (Button) this
        .findViewById(R.id.audioPlayerPlayButton);
    this.playButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        if (audioRecorder != null && isRecording) {
          audioRecorder.stop();
          audioRecorder.release();
          audioRecorder = null;
          try {
            audioPlayer = new MediaPlayer();
            audioPlayer.setDataSource(new FileInputStream(
                recordedAudioPath).getFD());
            audioPlayer.prepare();
            audioPlayer.start();
          } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
          recordButton.setText("Rec");
          isRecording = false;
        } else if (audioPlayer != null) {
          audioPlayer.start();
        }
      }
    });

    this.pauseButton = (Button) this
        .findViewById(R.id.audioPlayerPauseButton);
    this.pauseButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        if (audioPlayer != null) {
          audioPlayer.pause();
        }
      }
    });

    this.stopButton = (Button) this
        .findViewById(R.id.audioPlayerStopButton);
    this.stopButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        if (audioPlayer != null) {
          audioPlayer.pause();
          audioPlayer.seekTo(0);
        }
      }
    });
  }

  @Override
  protected void onPause() {
    //TODO Auto-generated method stub
    super.onPause();
    if (audioRecorder != null) {
      audioRecorder.release();
      audioRecorder = null;
    }
    if (audioPlayer != null) {
      audioPlayer.release();
      audioPlayer = null;
    }
  }

  @Override
  protected void onStop() {
    //TODO Auto-generated method stub
    super.onStop();
  }
}
Java Source Code List
