在CameraManager.java这个类中进行调整

默认的大小是 以下这4个参数 

// private static final int MIN_FRAME_WIDTH = 240;

// private static final int MIN_FRAME_HEIGHT = 240;

// private static final int MAX_FRAME_WIDTH = 480;

// private static final int MAX_FRAME_HEIGHT = 360;

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

/**

* 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;

}

我为了适配不同的屏幕大小将代码改成了

public Rect getFramingRect() {

Point screenResolution = configManager.getScreenResolution();

if (framingRect == null) {

if (camera == null) {

return null;

}

//修改之后

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;

}