Zxing 竖屏切换 android

在google上下载的ZxingDemo 为横屏状态

我简单的在Androidmanifest.xml把Activity换成竖屏android:screenOrientation="portrait"

屏幕虽然正了但是屏幕上显示的拍摄画面还是横着的

查了一些网上的资料结合自己手工调试

在这里总结分享一下

步骤:

1) 在AndroidManifest.xml中把<Activity />标签 CaptureActivity 的screenOrientation修改为

android:screenOrientation="portrait"

2) 在CameraManager.java类中的getFramingRectInPreview()替换掉原先的 left right top bottom

            //竖屏      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void setDesiredCameraParameters(Camera camera)方法

在setParameters之前增加

camera.setDisplayOrientation(90);

4) 在DecodeHandler.java中的decode(byte[] data, int width, int height)方法在

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

之前添加:

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; // Here we are swapping, that's the difference to #11  width = height;  height = tmp;  data = rotatedData;

5) 将CameraConfigurationManager的 initFromCameraParameters(Camera camera)方法整个替换如下

该方法防止竖屏后屏幕拉伸

/** * Reads, one time, values from the camera that are needed by the app. */void initFromCameraParameters(Camera camera) {Camera.Parameters parameters = camera.getParameters();previewFormat = parameters.getPreviewFormat();previewFormatString = parameters.get("preview-format");Log.d(TAG, "Default preview format: " + previewFormat + '/'+ previewFormatString);WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);Display display = manager.getDefaultDisplay();screenResolution = new Point(display.getWidth(), display.getHeight());Log.d(TAG, "Screen resolution: " + screenResolution);    Point screenResolutionForCamera = new Point();       screenResolutionForCamera.x = screenResolution.x;       screenResolutionForCamera.y = screenResolution.y;           // preview size is always something like 480*320, other 320*480    if (screenResolution.x < screenResolution.y) {           screenResolutionForCamera.x = screenResolution.y;           screenResolutionForCamera.y = screenResolution.x;    }cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);//cameraResolution = getCameraResolution(parameters, screenResolution);Log.d(TAG, "Camera resolution: " + screenResolution);}

至此Zxing 横屏就切换为竖屏

不足之处请在下方留言谢谢

希望对您有用

资源下载地址:http://download.csdn.net/detail/aaawqqq/7281577

Zxing 竖屏切换 android

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