修改ZXing for Android为竖屏模式

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这里针对ZXing 1.6版本，直接上方法 
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 = 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; 

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 

camera.setDisplayOrientation(90);