如何使用安卓VideoCapture OpenCV打开摄像头

import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.JavaCameraView;
import org.opencv.core.Mat;

public class MainActivity extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2 {

    private JavaCameraView cameraView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        cameraView = findViewById(R.id.camera_view);
        cameraView.setCvCameraViewListener(this);
        cameraView.enableView();
    }

    @Override
    public void onCameraViewStarted(int width, int height) {
    }

    @Override
    public void onCameraViewStopped() {
    }

    @Override
    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
        Mat frame = inputFrame.rgba();
        // 在这里对视频帧进行处理
        return frame;
    }
}

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />