Zxing portrait screen switch android

Zxing portrait screen switch android

The ZxingDemo downloaded on google is in the landscape status.

In Androidmanifest. xml, I simply change Activity to a vertical screen. android: screenOrientation = "portrait"

Although the screen is positive, the shooting screen displayed on the screen is still horizontal.

I checked some online materials and manually debugged them.

Here is a summary

Steps:

1) In AndroidManifest. xml, modify the screenOrientation of the tag CaptureActivity

android:screenOrientation="portrait"

2) replace the original left right top bottom with getFramingRectInPreview () in the CameraManager. java class.

// Rect. left = rect. left * cameraResolution. y/screenResolution. x; rect. right = rect. right * cameraResolution. y/screenResolution. x; rect. top = rect. top * cameraResolution. x/screenResolution. y; rect. bottom = rect. bottom * cameraResolution. x/screenResolution. y;

3) In CameraConfigurationManager. java, the void setDesiredCameraParameters (Camera camera) Method

Added before setParameters

camera.setDisplayOrientation(90);

4) In DecodeHandler. java, the decode (byte [] data, int width, int height) method in

PlanarYUVLuminanceSource source = CameraManager. get (). buildLuminanceSource (data, width, height );

Previously added:

byte[] rotatedData = new byte[data.length];  for (int y = 0; y < height; y++) {  for (int x = 0; x < width; x++)  rotatedData[x * height + height - y - 1] = data[x + y * width];  }  int tmp = width; // Here we are swapping, that's the difference to #11  width = height;  height = tmp;  data = rotatedData;

5) Replace the initFromCameraParameters (Camera camera) method of CameraConfigurationManager with the following:

This method prevents screen stretching after the portrait Screen

/** * Reads, one time, values from the camera that are needed by the app. */void initFromCameraParameters(Camera camera) {Camera.Parameters parameters = camera.getParameters();previewFormat = parameters.getPreviewFormat();previewFormatString = parameters.get("preview-format");Log.d(TAG, "Default preview format: " + previewFormat + '/'+ previewFormatString);WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);Display display = manager.getDefaultDisplay();screenResolution = new Point(display.getWidth(), display.getHeight());Log.d(TAG, "Screen resolution: " + screenResolution);    Point screenResolutionForCamera = new Point();       screenResolutionForCamera.x = screenResolution.x;       screenResolutionForCamera.y = screenResolution.y;           // preview size is always something like 480*320, other 320*480    if (screenResolution.x < screenResolution.y) {           screenResolutionForCamera.x = screenResolution.y;           screenResolutionForCamera.y = screenResolution.x;    }cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);//cameraResolution = getCameraResolution(parameters, screenResolution);Log.d(TAG, "Camera resolution: " + screenResolution);}

Now Zxing landscape screen is switched to landscape Screen

If you have any shortcomings, please leave a message below. Thank you.

Hope to be useful to you

Resources

Http://download.csdn.net/detail/aaawqqq/7278133