[android-developers] hi. i have a trouble with MediaRecorder

[Byeong Jo Lee]

hi.
i have been trying to record camera using MediaRecorder.
i searched some sample source code.
but they dose not work...

actually i succeeded recording audio, but i can't record video.
is there someone who advice me?

---------------- source code -----------------------
package lbj.camera.test;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CameraTest2 extends Activity {
        public MediaRecorder mrec = null;
        File videofile;

        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                mPreview = new Preview(this);
                setContentView(mPreview);
        }

        private Preview mPreview;
        SurfaceView sv;
        SurfaceHolder holder;

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
                menu.add("Capture");
                menu.add("Save");
                return super.onCreateOptionsMenu(menu);
        }

        public boolean onOptionsItemSelected(MenuItem item) {
                if (item.getTitle().equals("Capture")) {
                        try {
                                mPreview.record();
                        } catch (Exception e) {
                                e.printStackTrace();
                                Log.d("Has not finished here:", "Starting 
video");
                        }
                } else if (item.getTitle().equals("Save")) {
                        mPreview.saveAndStop();
                }
                return true;
        }
}

class Preview extends SurfaceView implements SurfaceHolder.Callback {

        SurfaceHolder mHolder;
        Camera mCamera;
        Context context;
        MediaRecorder recorder = null;

        public void record() throws Exception{
                File audiofile = null;
                try {
                        String mSdCardPath =
Environment.getExternalStorageDirectory().getAbsolutePath();
                        audiofile = new File(mSdCardPath + File.separator + 
"test.3gp");
                        audiofile.createNewFile();
                } catch (Exception e) {
                        throw e;
                }

                recorder = new MediaRecorder();

                recorder.setCamera(mCamera);
                recorder.setPreviewDisplay(mHolder.getSurface());

                recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

                recorder.setOutputFile(audiofile.getAbsolutePath());
                recorder.setVideoSize(176, 144);
                recorder.setVideoFrameRate(15);

                recorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

                Log.d("Has Entered here:", "Starting video");

                if (recorder != null) {
                        try {
                                recorder.prepare();
                                recorder.start();
                        } catch (Exception ex) {
                                ex.printStackTrace();
                        }
                }
        }

        Preview(Context context) {
                super(context);

                mHolder = getHolder();
                mHolder.addCallback(this);
                mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        }

        public void surfaceCreated(SurfaceHolder holder) {
                try {
                        mCamera = Camera.open();
                        mCamera.setPreviewDisplay(holder);
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        public void surfaceDestroyed(SurfaceHolder holder) {
                Log.d("Stopping preview", "in preview class");
                mCamera.stopPreview();
                mCamera = null;
        }

        public void surfaceChanged(SurfaceHolder holder, int format, int w,
int h) {
                Camera.Parameters parameters = mCamera.getParameters();
                parameters.setPreviewSize(w, h);
                mCamera.setParameters(parameters);
                mCamera.startPreview();
        }

        public void saveAndStop() {
                if (recorder != null) {
                        try {
                                recorder.stop();
                                recorder.reset();
                                recorder.release();
                        } catch (IllegalStateException e) {
                                e.printStackTrace();
                        }
                }
        }
}

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