修改zxing扫描二维码区域大小

来源：互联网发布：淘宝天猫积分怎么用编辑：程序博客网时间：2024/09/21 09:19

zxing原生demo种的获取扫描区域大小的代码在getFramingRect（）中

/**  * Calculates the framing rect which the UI should draw to show the user where to place the  * barcode. This target helps with alignment as well as forces the user to hold the device  * far enough away to ensure the image will be in focus.  *  * @return The rectangle to draw on screen in window coordinates.  */ public Rect getFramingRect() {   Point screenResolution = configManager.getScreenResolution();   if (framingRect == null) {     if (camera == null) {       return null;     }           //原生     int width = screenResolution.x * 3 / 4;     if (width < MIN_FRAME_WIDTH) {       width = MIN_FRAME_WIDTH;     } else if (width > MAX_FRAME_WIDTH) {       width = MAX_FRAME_WIDTH;     }     int height = screenResolution.y * 3 / 4;     if (height < MIN_FRAME_HEIGHT) {       height = MIN_FRAME_HEIGHT;     } else if (height > MAX_FRAME_HEIGHT) {       height = MAX_FRAME_HEIGHT;     }     int leftOffset = (screenResolution.x - width) / 2;     int topOffset = (screenResolution.y - height) / 2;     framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);     Log.d(TAG, "Calculated framing rect: " + framingRect);   }   return framingRect; }

根据屏幕大小调整大家可以增大这些数值 : 最小的宽高 ; 最大宽高

参数实际在 getFramingRect() 方法中起作用

以下是原本Demo中提供的

我为了适配不同的屏幕大小将代码改成了

?publicRect getFramingRect() {  Point screenResolution = configManager.getScreenResolution();  if(framingRect == null) {    if(camera == null) {      returnnull;    }       //修改之后   intwidth = screenResolution.x * 7/ 10;  intheight = screenResolution.y * 7/ 10;     intleftOffset = (screenResolution.x - width) / 2;  inttopOffset = (screenResolution.y - height) / 3;  framingRect = newRect(leftOffset, topOffset, leftOffset + width, topOffset + height);              Log.d(TAG,"Calculated framing rect: " + framingRect);  }  returnframingRect;}

宽高我占据了屏幕的 7/10

public Rect getFramingRect() {Point screenResolution = configManager.getScreenResolution();if (framingRect == null) {if (camera == null) {return null;}// ??????int width = screenResolution.x * 7 / 10;int height = screenResolution.y * 7 / 10;int leftOffset = (screenResolution.x - width) / 2;int topOffset = (screenResolution.y - height) / 3;framingRect = new Rect(leftOffset, topOffset, leftOffset + width,topOffset + height);Log.d(TAG, "Calculated framing rect: " + framingRect);}return framingRect;}

当然...取图改的这么大会多占一点内存....相应的扫描的时候快得多

以上是实际读取图片的大小

实际的界面美化在ViewfinderView 这个类当中进行绘制

不足之处请在下方留言谢谢

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