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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"

屏幕尽管正了 可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改动为

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之前添加

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);

之前加入:

       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)方法整个替换例如以下

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*480if (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

希望对您实用

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