//CameraView对外提供的功能，详细见ICamera，IFlashLight

//CameraView使用
private CameraView mCameraView;
//================常用的功能如下=================
//拍照
mCameraView.take();
//对焦
mCameraView.focus(float x, float y, float rawX, float rawY);
//切换前置后置
mCameraView.switchFace();
//相机切换预览比例和拍照比例
mCameraView.switchAspect(@ExAspectRatio.ExRatio int ratio);
    
//================设置回调======================
//设置拍照回调
mCameraView.setOnCameraListener(OnCameraListener l);
//设置对焦回调
mCameraView.setOnFocusListener(OnFocusListener l);    
//设置图片分析回调
mCameraView.setOnImgAnalysisListener(OnImgAnalysisListener l);
//设置前后摄像头切换回调
mCameraView.setOnCameraFaceListener(OnCameraFaceListener l);
//设置相机预览view的布局和尺寸变化回调
mCameraView.setOnPreviewLayoutListener(OnPreviewLayoutListener l);

   FragmentManager fm = getSupportFragmentManager();
   FragmentTransaction ft = fm.beginTransaction();
   final CameraFragment cfg = new CameraFragment();

   CameraOption option = new CameraOption.Builder(ExAspectRatio.RATIO_16_9)
           .faceFront(false)
           .build();

   Bundle data = new Bundle();
   data.putSerializable(CameraFragment.KEY_CAMERA_OPTION, option);
   cfg.setArguments(data);
   cfg.setOnCameraListener(new OnCameraListener() {
       @Override
       public void onTaken(Uri uri) {
           //返回拍照图片uri
       }

       @Override
       public void onCancel() {
           finish();
       }
   });

startActivityForResult(new Intent(MainActivity.this, CameraXActivity.class), 1000);

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == RESULT_OK && data != null) {
            //返回拍照的图片地址
            Uri uri = data.getData();
        }
    }

setWrapQrCodeCallback

    mQRCodeView = new QRCodeView(mContext);
    mQRCodeView.setOnQrCodeCallback(QrCodeCallback callback);
    mQRCodeView.setScannerFrameOption(new ScannerFrameOption.Builder()
            .frameMode(ScannerFrameOption.FrameMode.MODE_FRAME_SQUARE)
            .frameRatio(0.6f)
            .build());

   //add mQRCodeView