I want to show portrait
orientation on Zxing
's camera.
How can this be done?
Here's how it works.
Step 1: Add following lines to rotate data before buildLuminanceSource(..)
in decode(byte[] data, int width, int height)
DecodeHandler.java:
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;
width = height;
height = tmp;
PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(rotatedData, width, height);
Step 2: Modify getFramingRectInPreview()
.
CameraManager.java
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;
Step 3: Disable the check for Landscape Mode in initFromCameraParameters(...)
CameraConfigurationManager.java
//remove the following
if (width < height) {
Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
int temp = width;
width = height;
height = temp;
}
Step 4: Add following line to rotate camera insetDesiredCameraParameters(...)
CameraConfigurationManager.java
camera.setDisplayOrientation(90);
Step 5: Do not forget to set orientation of activity to portrait. I.e: manifest