解决Android竖屏下二维码开发与相机旋转问题

1、修改manifest文件，将CaptureActivity设为portrait
android:screenOrientation="portrait"

2、在DecodeHandler.java文件中，找到decode(byte[],int,int)方法，在buildLuminanceSource调用前，加上如下：
byte[] rotatedData = newbyte[data.length];
for(inty = 0; y < height; y++) {
    for(intx = 0; x < width; x++)
    rotatedData[x * height + height - y - 1] = data[x + y * width];
}
inttmp = width; // Here we are swapping, that's the difference to #11
width = height;
height = tmp;
data = rotatedData;

3、在CameraManager.java中找到getFramingRectInPreview()方法， 替换相应代码：

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;


4、在CameraConfigurationManager.java里找到setDesiredCameraParameters()方法，加入代码：（这里不同的SDK版本可能调用的方法不一样）
camera.setDisplayOrientation(90);
兼容版本如下：
void setDesiredCameraParameters(Camera camera) {
Camera.Parameters parameters = camera.getParameters();
Log.d(TAG, "Setting preview size: " + cameraResolution);
parameters.setPreviewSize(cameraResolution.x, cameraResolution.y);
parameters.setSceneMode(Camera.Parameters.SCENE_MODE_PORTRAIT);