Android的 - 在后台录制视频，并同时显示在一个表面观录制视频 [英] Android - Record video in background and simultaneously show the recording video in a Surface View

问题描述

我有一个活动这就要求相机服务可开始使用前置摄像头拍摄的背景。的要求是，以显示相同的视频被记录在一个表面图。这是我的活动

I have an Activity which calls a camera service which starts recording in background using the front camera. The requirement is to show the same video being recorded in a surface view. This is my activity

public class StartTestActivity extends Activity implements
    SurfaceHolder.Callback {
private static final String TAG = "Recorder";
public static SurfaceView mSurfaceView;
public static SurfaceHolder mSurfaceHolder;
public static Camera mCamera;
public static boolean mPreviewRunning;
boolean found = false;
int i;

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

    mSurfaceView = (SurfaceView) findViewById(R.id.surfaceview);
    mSurfaceHolder = mSurfaceView.getHolder();
    mSurfaceHolder.addCallback(this);
    mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    Button btnStart = (Button) findViewById(R.id.button1);

    btnStart.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(StartTestActivity.this,
                    RecorderService.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startService(intent);
            finish();

        }
    });

    Button btnStop = (Button) findViewById(R.id.button2);
    btnStop.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            stopService(new Intent(StartTestActivity.this,
                    RecorderService.class));
        }
    });
}

@Override
public void surfaceCreated(SurfaceHolder holder) {


}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {


}


}

这是我的服务

and this is my service

 public class RecorderService extends Service {
    private static final String TAG = "RecorderService";
    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    private static Camera mServiceCamera;
    private boolean mRecordingStatus;
    private MediaRecorder mMediaRecorder;
    boolean found = false;
    int i;

    @Override
    public void onCreate() {

        mRecordingStatus = false;

        mSurfaceView = StartTestActivity.mSurfaceView;
        mSurfaceHolder = StartTestActivity.mSurfaceHolder;
        // Getting front camera id in i
        for (i = 0; i < Camera.getNumberOfCameras(); i++) {
            Camera.CameraInfo newInfo = new Camera.CameraInfo();
            Camera.getCameraInfo(i, newInfo);
            if (newInfo.facing == CameraInfo.CAMERA_FACING_FRONT) {
                found = true;
                break;
            }
        }
        mServiceCamera = Camera.open(i);
        super.onCreate();
        if (mRecordingStatus == false)
            if (startRecording()) {
                Intent intent = new Intent(getBaseContext(),
                        StartTestActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                getApplication().startActivity(intent);
            }

    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onDestroy() {
        stopRecording();
        mRecordingStatus = false;

        super.onDestroy();
    }

    public boolean startRecording() {
        try {
            Toast.makeText(getBaseContext(), "Recording Started",
                    Toast.LENGTH_SHORT).show();

            Camera.Parameters params = mServiceCamera.getParameters();
            mServiceCamera.setParameters(params);
            Camera.Parameters p = mServiceCamera.getParameters();

            final List<Size> listSize = p.getSupportedPreviewSizes();
            Size mPreviewSize = listSize.get(2);
            Log.v(TAG, "use: width = " + mPreviewSize.width + " height = "
                    + mPreviewSize.height);
            p.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
            p.setPreviewFormat(PixelFormat.YCbCr_420_SP);
            mServiceCamera.setParameters(p);

            try {
                mServiceCamera.setPreviewDisplay(mSurfaceHolder);
                mServiceCamera.startPreview();
            } catch (IOException e) {
                Log.e(TAG, e.getMessage());
                e.printStackTrace();
            }

            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(Environment
                    .getExternalStorageDirectory() + "/video.mp4");

            mMediaRecorder.setVideoFrameRate(30);
            mMediaRecorder
                    .setVideoSize(mPreviewSize.width, mPreviewSize.height);
            mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

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

            mRecordingStatus = true;

            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;
        }
    }

    public void stopRecording() {
        Toast.makeText(getBaseContext(), "Recording Stopped",
                Toast.LENGTH_SHORT).show();
        try {
            mServiceCamera.reconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        mServiceCamera.stopPreview();
        mMediaRecorder.release();

        mServiceCamera.release();
        mServiceCamera = null;
    }
}

在已经启动的控制服务回归到StartTestActivity（其中有一个启动和停止按钮和一个surfaceview）和前置摄像头开始录制视频，我只是希望能够在显示当前录音录像面视图（屏幕的仅一部分引起的剩余部分可具有图像或文本）中的活性，以使用户能够看到他自己的记录期间。我所面临的问题相机已被用于记录，因此它已被锁定，如果任何人都可以建议我周围的工作这将是一个很大的帮助。谢谢你。

once the service has been started the control comes back to the StartTestActivity(which has a start and stop button and a surfaceview) and the front camera starts recording the video, i just want to be able to display the current recording video in surface view(only a part of the screen cause the remaining part may have an image or text) in the activity so that the user is able to see himself during the recording. The problem i faced was the camera is already being used for recording and hence it is locked, if anyone can suggest me a work around it would be a great help. Thank you.

推荐答案

试试这个，这是完全为我工作：）

try this ,it is worked perfectly for me :)

我的活动类

public class CameraRecorder extends Activity implements SurfaceHolder.Callback {
private static final String TAG = "Recorder";
public static SurfaceView mSurfaceView;
public static SurfaceHolder mSurfaceHolder;
public static Camera mCamera ;
public static boolean mPreviewRunning;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

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

    Button btnStart = (Button) findViewById(R.id.StartService);
    btnStart.setOnClickListener(new View.OnClickListener()
    {
        public void onClick(View v)
        {
            Intent intent = new Intent(CameraRecorder.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(CameraRecorder.this, RecorderService.class));
        }
    });
}

@Override
public void surfaceCreated(SurfaceHolder holder) {

}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}
 }

和我的服务类，记录在后台的视频

and my service class to record video in background

    public class RecorderService extends Service {
    private static final String TAG = "RecorderService";
    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    private static Camera mServiceCamera;
    private boolean mRecordingStatus;
    private MediaRecorder mMediaRecorder;

    @Override
    public void onCreate() {
        mRecordingStatus = false;
        //mServiceCamera = CameraRecorder.mCamera;
        mServiceCamera = Camera.open();
        mSurfaceView = CameraRecorder.mSurfaceView;
        mSurfaceHolder = CameraRecorder.mSurfaceHolder;

        super.onCreate();
        if (mRecordingStatus == false)
            startRecording();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onDestroy() {
        stopRecording();
        mRecordingStatus = false;

        super.onDestroy();
    }   

    public boolean startRecording(){
        try {
            Toast.makeText(getBaseContext(), "Recording Started", Toast.LENGTH_SHORT).show();

            //mServiceCamera = Camera.open();
            Camera.Parameters params = mServiceCamera.getParameters();
            mServiceCamera.setParameters(params);
            Camera.Parameters p = mServiceCamera.getParameters();

            final List<Size> listSize = p.getSupportedPreviewSizes();
            Size mPreviewSize = listSize.get(2);
            Log.v(TAG, "use: width = " + mPreviewSize.width 
                        + " height = " + mPreviewSize.height);
            p.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
            p.setPreviewFormat(PixelFormat.YCbCr_420_SP);
            mServiceCamera.setParameters(p);

            try {
                mServiceCamera.setPreviewDisplay(mSurfaceHolder);
                mServiceCamera.startPreview();
            }
            catch (IOException e) {
                Log.e(TAG, e.getMessage());
                e.printStackTrace();
            }

            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.setVideoSize(mPreviewSize.width, mPreviewSize.height);
            mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

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

            mRecordingStatus = true;

            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;
        }
    }

    public void stopRecording() {
        Toast.makeText(getBaseContext(), "Recording Stopped", Toast.LENGTH_SHORT).show();
        try {
            mServiceCamera.reconnect();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        mServiceCamera.stopPreview();
        mMediaRecorder.release();

        mServiceCamera.release();
        mServiceCamera = null;
    }
}

这将创建一个在你的SD卡上的文件video.mp4。希望这将帮助您的朋友：）

It will create a file video.mp4 in your sd card. hope this will help you friend :)

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