Android - 在后台录制视频，同时在Surface View中显示录制视频

时间：2014-11-24 04:56:08

标签： android android-activity camera android-service video-recording

我有一个调用相机服务的Activity，它使用前置摄像头开始在后台录制。要求是在表面视图中显示相同的视频。这是我的活动

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

 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;
    }
}

一旦服务启动，控件将返回StartTestActivity（具有开始和停止按钮和surfaceview），前置摄像头开始录制视频，我只想显示当前录制的视频活动中的表面视图（仅屏幕的一部分导致剩余部分可能具有图像或文本），使得用户能够在记录期间看到自己。我遇到的问题是相机已经被用于录制，因此它被锁定，如果有人可以建议我周围的工作将是一个很大的帮助。谢谢。

1 个答案:

答案 0 :(得分：2)

试试这个，它对我来说很完美：）

我的活动课

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

}
 }

和我的服务类在后台录制视频

    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;
    }
}

它会在你的SD卡中创建一个video.mp4文件。希望这能帮助你的朋友：）

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