protected void _showCamera(
        int rotation,
        int cameraW,
        int cameraH,
        int left,
        int top,
        int right,
        int bottom,
        String overlayBody,
        final CallbackContext callbackContext
    ){
        if(this.isShowing)return;
        isShowing = true;
        MyCustomContext mainActivity = (MyCustomContext)cordova.getActivity();
        this.cameraView.overlayWebView.stopLoading();
        cameraView.overlayWebView.loadData("", "text/html", "UTF-8");
        this.cameraView.overlayWebView.loadDataWithBaseURL("file:///android_asset/www/",overlayBody, "text/html", "UTF-8","");
        this.camera = Camera.open();
        Camera.Parameters parameters = this.camera.getParameters();
        if(parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)){
            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
        }
        parameters.setPreviewSize(cameraW,cameraH);
        getBiggestPictureSize(parameters);
        parameters.setPictureFormat(ImageFormat.JPEG);
        parameters.setJpegQuality(90);
        this.camera.setParameters(parameters);
        this.parameters = parameters;
        this.camera.setDisplayOrientation(rotation);
        mainActivity.mainView.addView(this.cameraView); // cameraView is the GroupView
        this.cameraView.measure(right - left, bottom - top);
        this.cameraView.layout(left, top, right, bottom);
        this.cameraView.setCamera(camera);
        this._autoFocus();
        callbackContext.success();
    }

    protected void _hideCamera(){
        isShowing = false;
        if(camera == null)return;
        cameraView.overlayWebView.loadData("", "text/html", "UTF-8");
        this.cameraView.setCamera(null);
        this.camera.stopPreview();
        this.camera.release();
        this.camera = null;
        MyCustomContext mainActivity = (MyCustomContext)cordova.getActivity();
        mainActivity.mainView.removeView(this.cameraView);
    }

    @Override
    public void onDestroy(){
        if(this.camera != null){
            this.cameraView.setCamera(null);
            this.camera.stopPreview();
            this.camera.release();
            this.camera = null;
        }
    }

    @Override
    public void onPause(boolean multitasking){
        if(this.camera != null){
            this.cameraView.setCamera(null);
            this.camera.stopPreview();
            this.camera.release();
            this.camera = null;
        }
    }

    @Override
    public void onResume(boolean multitasking){
        if(this.isShowing){
            this.camera = Camera.open(0);
            this.camera.setParameters(this.parameters);
            this.cameraView.setCamera(this.camera);
            this._autoFocus();
        }
    }