Zxing 豎屏切換 android

Zxing 豎屏切換  android

在google上下載下傳的ZxingDemo 為橫屏狀态  

我簡單的在Androidmanifest.xml把Activity換成豎屏android:screenOrientation="portrait"

螢幕雖然正了 但是螢幕上顯示的拍攝畫面還是橫着的 

查了一些網上的資料   結合自己手工調試 

在這裡總結分享一下

步驟:

1)   在AndroidManifest.xml中把  <Activity  />标簽  CaptureActivity 的screenOrientation修改為

android:screenOrientation="portrait"
           

2)  在CameraManager.java類中的getFramingRectInPreview()替換掉原先的 left right top bottom

//豎屏
      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)方法整個替換如下

該方法防止豎屏後螢幕拉伸

/**
	 * 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 橫屏就切換為豎屏

不足之處請在下方留言  謝謝 

希望對您有用 

資源下載下傳位址:http://download.csdn.net/detail/aaawqqq/7281577