版權(quán)聲明：本文為博主原創(chuàng)文章，未經(jīng)博主同意不得轉(zhuǎn)載。 https://blog.csdn.net/aaawqqq/article/details/24804939

Zxing 豎屏切換? android

在google上下載的ZxingDemo 為橫屏狀態(tài)??

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

屏幕盡管正了 可是屏幕上顯示的拍攝畫面還是橫著的?

查了一些網(wǎng)上的資料?? 結(jié)合自己手工調(diào)試?

在這里總結(jié)分享一下

?

步驟:

1)?? 在AndroidManifest.xml中把??<Activity? />標簽 ?CaptureActivity 的screenOrientation改動為

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)? 將CameraConfigurationManager的? initFromCameraParameters(Camera camera)方法整個替換例如以下

該方法防止豎屏后屏幕拉伸

?

/*** 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 橫屏就切換為豎屏

不足之處請在下方留言? 謝謝?

希望對您實用?

資源下載地址:http://download.csdn.net/detail/aaawqqq/7281577

?

?

轉(zhuǎn)載于:https://www.cnblogs.com/xfgnongmin/p/10867300.html

總結(jié)

以上是生活随笔為你收集整理的Zxing 竖屏切换 android的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。