首页 > android, java > zxing二维码条码扫描横屏landscape转竖屏portrait

zxing二维码条码扫描横屏landscape转竖屏portrait

2011年12月22日 发表评论 阅读评论

zxing包默认是横屏扫描一维条码,用户体验上不是很方便需要换手翻转手机。

这两天查了查相关资料,解决方法如下:

1.在DecodeHandler.java中,修改decode方法
PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);

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;

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

2.在CameraManager.java中,注释代码:
// rect.left = rect.left * cameraResolution.x / screenResolution.x;
// rect.right = rect.right * cameraResolution.x / screenResolution.x;
// rect.top = rect.top * cameraResolution.y / screenResolution.y;
// rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
修改为
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.在CameraConfigurationManager.java中,在setDesiredCameraParameters方法中添加一句
camera.setDisplayOrientation(90);

4.在AndroidManifest.xml中,把Activity的属性android:screenOrientation="landscape"
改为
android:screenOrientation="portrait"

编译运行即可!

5.修改取景框大小
在CameraManager.java中,把getFramingRect()方法中

//framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);

framingRect = new Rect(0, topOffset, leftOffset+leftOffset + width, topOffset + height);

参考:

http://code.google.com/p/zxing/issues/detail?id=178#c46
http://rayln.iteye.com/www/1221006

http://apps.hi.baidu.com/share/detail/48397442

除非注明,本站文章均为: nginx.cn原创,转载请注明本文地址: http://www.nginx.cn/1476.html

--完--

分类: android, java 标签: , , ,
  1. 本文目前尚无任何评论.
  1. 本文目前尚无任何 trackbacks 和 pingbacks.