import java.io.File;
import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.VideoView;

public class MainActivity extends Activity implements SurfaceHolder.Callback {

	    private MediaRecorder recorder = null;
	    private static final String OUTPUT_FILE = "/sdcard/videooutput.mp4";
	    private static final String TAG = "RecordVideo";
	    private VideoView videoView = null;
	    private Button startBtn = null;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        startBtn = (Button) findViewById(R.id.bgnBtn);

        Button endBtn = (Button) findViewById(R.id.stpBtn);

        Button playRecordingBtn = (Button) findViewById(R.id.playRecordingBtn);

        Button stpPlayingRecordingBtn = 
(Button) findViewById(R.id.stpPlayingRecordingBtn);

        videoView = (VideoView)this.findViewById(R.id.videoView);

        final SurfaceHolder holder = videoView.getHolder();
        holder.addCallback(this);
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        startBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                try {
                    beginRecording(holder);
                } catch (Exception e) {
                    Log.e(TAG, e.toString());
                    e.printStackTrace();
                }
            }
        });

        endBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                try {
                    stopRecording();
                } catch (Exception e) {
                    Log.e(TAG, e.toString());
                    e.printStackTrace();
                }
            }
        });

        playRecordingBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                try {
                    playRecording();
                } catch (Exception e) {
                    Log.e(TAG, e.toString());
                    e.printStackTrace();
                }
            }
        });

        stpPlayingRecordingBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                try {
                    stopPlayingRecording();
                } catch (Exception e) {
                    Log.e(TAG, e.toString());
                    e.printStackTrace();
                }
            }
        });
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        startBtn.setEnabled(true);
    }
    
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
	    	    int height) {
        Log.v(TAG, "Width x Height = " + width + "x" + height);
    }

    private void playRecording() {
        MediaController mc = new MediaController(this);
        videoView.setMediaController(mc);
        videoView.setVideoPath(OUTPUT_FILE);
        videoView.start();
    }
    
    private void stopPlayingRecording() {
        videoView.stopPlayback();
    }
    
    private void stopRecording() throws Exception {
        if (recorder != null) {
            recorder.stop();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (recorder != null) {
            recorder.release();
        }
    }

    private void beginRecording(SurfaceHolder holder) throws Exception {
        if(recorder!=null)
        {
            recorder.stop();
            recorder.release();
        }

        File outFile = new File(OUTPUT_FILE);
        if(outFile.exists())
        {
            outFile.delete();
        }

        try {
            recorder = new MediaRecorder();
            recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
            recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            recorder.setVideoSize(176, 144);
            recorder.setVideoFrameRate(15);
            recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            recorder.setMaxDuration(30000); // limit to 30 seconds
            recorder.setPreviewDisplay(holder.getSurface());
            recorder.setOutputFile(OUTPUT_FILE);
            recorder.prepare();
            recorder.start();
        }
        catch(Exception e) {
            Log.e(TAG, e.toString());
            e.printStackTrace();
        }
    }
}