Android zxing change orientation to portrait

zxing https://code.google.com/p/zxing/

Multi-format 1D/2D barcode image processing library with clients for Android, Java

 

zxing-client-android屏幕方向默认是landscape模式，修改如下源码，可改为portrait模式：

 

1、AndroidManifest.xml：

     将android:screenOrientation="landscape"改为 

android:screenOrientation="portrait"

 

2、DecodeHandler.java：

     在buildLuminanceSource方法调用前增加

    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;
    data = rotatedData;

 

3、CameraManager.java

     将已有的计算rect.left/right/top/bottom的代码，替换为 

      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;

 

4、CameraConfigurationManager.java

     4.1、在setDesiredCameraParameters方法内新增代码 

	camera.setDisplayOrientation(90);

 

     4.2、在initFromCameraParameters方法内注解掉代码 (最新代码可能不需要再改动此处 20130907)

    /*if (width < height) {
      Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
      int temp = width;
      width = height;
      height = temp;
    }*/

 

 

注，以上改动基于GoogleCode上最新zxing-client-android源码，并验证有效可行。