Android Zxing调整扫描区域 优化取图速度
zxing
ZXing ("Zebra Crossing") barcode scanning library for Java, Android
项目地址:https://gitcode.com/gh_mirrors/zx/zxing

·
Zxing 是google提供的二维码扫描工程
Demo本身默认的扫图区域最大只有 360*480 需要拉开很远的距离才能将整个二维码扫描到
因此需要我们自己调整取图大小
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;
}
宽高 我占据了屏幕的 7/10
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
希望对您有用




ZXing ("Zebra Crossing") barcode scanning library for Java, Android
最近提交(Master分支:19 天前 )
0a14de90
1 个月前
f2813890
Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)
---
updated-dependencies:
- dependency-name: actions/checkout
dependency-version: '5'
dependency-type: direct:production
update-type: version-update:semver-major
...
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> 1 个月前
更多推荐
所有评论(0)