ZXing改横屏识别为竖屏识别

Apache License 2.0 开源的 ZXing项目

ZXing的android项目东西太多了,有很多是我们不需要的,得新建另一个项目简化它。

 

在开始前大致介绍一下简化ZXing需要用到各个包 、类的职责。

     CaptureActivity。这个是启动Activity 也就是扫描器(如果是第一安装,它还会跳转到帮助界面)。
     CaptureActivityHandler 解码处理类,负责调用另外的线程进行解码。
     DecodeThread 解码的线程。
     com.google.zxing.client.android.camera 包,摄像头控制包。
     ViewfinderView 自定义的View,就是我们看见的拍摄时中间的框框了。   

 

 解决方法:

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!


参考:

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


代码:
https://github.com/pplante/zxing-android

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