zxing setEccLevel
时间: 2023-10-16 07:10:58 浏览: 42
setEccLevel 是一个方法,它是在 ZXing 库中的 QRCodeWriter 类中定义的。该方法用于设置二维码中的纠错级别,即二维码中可以容忍的错误数量。在调用 setEccLevel 方法时,需要传入一个枚举类型参数,表示纠错级别。一般来说,纠错级别越高,可以容忍的错误数量就越多,但二维码的容量也会相应减小。常见的纠错级别包括:
- L:容错级别为 7%;
- M:容错级别为 15%;
- Q:容错级别为 25%;
- H:容错级别为 30%。
例如,如果要将纠错级别设置为 M,可以使用以下代码:
```
QRCodeWriter writer = new QRCodeWriter();
BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
matrix.setRegion(left, top, width, height);
writer.writeToStream(matrix, "png", new FileOutputStream(new File("qrcode.png")));
```
在上面的代码中,我们将纠错级别设置为 M,然后使用 QRCodeWriter 类的 encode 方法生成二维码矩阵。最后,将矩阵写入到文件中。