二维码扫描(横屏、竖屏、解决竖屏后拉伸问题、美化扫描框)
以前上传过一个源码:Android二维码扫描简单源码
是根据zxing的源码进行简化的,不过只支持横屏。
其实支持竖屏也挺简单的:【http://stackoverflow.com/questions/16252791/zxing-camera-in-portrait-mode-on-android】
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 followingif (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
但是这样之后,会出现拉伸的问题,解决方法如下:更改CameraConfigurationManager.java文件
在 Log.d(TAG, "Screen resolution: " + screenResolution);这句之后增加
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;
}
再更改cameraResolution = getCameraResolution(parameters, screenResolution);为cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);
如果想美化一下取景框,可以参看代码:https://code.csdn.net/snippets/64838
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