使用服务拍摄照片和录制视频

Question

我正在使用服务拍摄背景照片，然后切换到录制视频。切换到mediarecorder时，我总是收到错误：

08-10 09:09:06.999 15263-15263/quantum_soft.com.vidsense E/MediaRecorderJNI: Application lost the surface
08-10 09:09:06.999 15263-15263/quantum_soft.com.vidsense D/RecorderService: invalid preview surface
08-10 09:09:06.999 15263-15263/quantum_soft.com.vidsense W/System.err: java.io.IOException: invalid preview surface
08-10 09:09:06.999 15263-15263/quantum_soft.com.vidsense W/System.err:     at android.media.MediaRecorder._prepare(Native Method)
08-10 09:09:06.999 15263-15263/quantum_soft.com.vidsense W/System.err:     at android.media.MediaRecorder.prepare(MediaRecorder.java:582)
08-10 09:09:07.009 15263-15263/quantum_soft.com.vidsense W/System.err:     at quantum_soft.com.vidsense.RecorderService.startRecording(RecorderService.java:78)
08-10 09:09:07.009 15263-15263/quantum_soft.com.vidsense W/System.err:     at quantum_soft.com.vidsense.RecorderService$1.onPictureTaken(RecorderService.java:39)

该服务能够拍摄照片或录制视频，但我不能让它一个接一个地做，而不会丢失表面。我已经尝试了各种组合释放相机，预览等但到目前为止没有运气。

我的服务是：

public class RecorderService extends Service {
    private static final String TAG = "RecorderService";
    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    private static Camera mServiceCamera;
    private MediaRecorder mMediaRecorder;
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;
    Camera.PictureCallback jpegCallback;

    @Override
    public void onCreate() {

        mSurfaceView = MainActivity.mSurfaceView;
        mSurfaceHolder = MainActivity.mSurfaceHolder;

        jpegCallback = new Camera.PictureCallback() {
            public void onPictureTaken(byte[] data, Camera camera) {
                startRecording();
            }
        };
        takePhoto();
    }

    public void takePhoto(){

        mServiceCamera = getCameraInstance();
        try {
            mServiceCamera.setPreviewDisplay(mSurfaceHolder);
            mServiceCamera.startPreview();
        }
        catch (IOException e) {
            Log.e(TAG, e.getMessage());
            e.printStackTrace();
        }
        mServiceCamera.takePicture(null, null, jpegCallback);
    }
    public boolean startRecording(){

        showLog("Recording Started");
        releaseCamera();
        mServiceCamera=getCameraInstance();

        try {

            mServiceCamera.unlock();
            mMediaRecorder = new MediaRecorder();
            mMediaRecorder.setCamera(mServiceCamera);
            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
            mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
            mMediaRecorder.setOutputFile("/sdcard/video.mp4");
            mMediaRecorder.setVideoFrameRate(30);
            mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

            mMediaRecorder.prepare();
            mMediaRecorder.start();

            return true;
        } catch (IllegalStateException e) {
            Log.d(TAG, e.getMessage());
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            Log.d(TAG, e.getMessage());
            e.printStackTrace();
            return false;
        }
    }

    private Camera getCameraInstance(){
        Camera c = null;
        try {
            c = Camera.open();
        }
        catch (Exception e){
        }
        return c;
    }
    private void releaseCamera(){
        if (mServiceCamera != null){
            mServiceCamera.stopPreview();
            mServiceCamera.setPreviewCallback(null);
            mServiceCamera.release();
            mServiceCamera = null;
        }
    }
    public void showMsg(String msg) {
        Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
    }
    public void showLog(String msg) {
        Log.d("VidTest", msg);
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
    }
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
}

我的主要是：

public class MainActivity extends Activity {
    private static final String TAG = "Recorder";
    public static SurfaceView mSurfaceView;
    public static SurfaceHolder mSurfaceHolder;
    public static SurfaceView mSurfaceView2;
    public static SurfaceHolder mSurfaceHolder2;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        File mediaStorageDir = new File("/sdcard", "VidTest");
        mediaStorageDir = new File(Environment.getExternalStorageDirectory().getPath() + "/VidTest/", "vids");
        if (! mediaStorageDir.exists()){
            if (! mediaStorageDir.mkdirs()) {
                showMsg("Failed to create directories");
                finish();
            }
        }

        mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
        mSurfaceHolder = mSurfaceView.getHolder();
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);


        Button btnStart = (Button) findViewById(R.id.StartService);
        btnStart.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showMsg("Moitoring service started");
                Intent intent = new Intent(MainActivity.this, RecorderService.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startService(intent);
                finish();
            }
        });

        Button btnStop = (Button) findViewById(R.id.StopService);
        btnStop.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                stopService(new Intent(MainActivity.this, RecorderService.class));
            }
        });
   }
    public void showMsg(String msg) {
        Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
    }
    public void showLog(String msg) {
        Log.d("VidSense", msg);
    }
}