在 Android 中将图像裁剪为圆形 [英] Crop Image as circle in Android

问题描述

有谁知道如何将图像位图裁剪成圆形?我找不到任何解决方案，抱歉..

Does anyone know how to crop an imageitmap to a circle? I can not find any solution, sorry ..

推荐答案

对于 ImageView 的圆角，请将图像转换为位图，然后尝试以下代码:

For having rounded corners for ImageView, convert your image into bitmap and then try following code :

private Bitmap getRoundedCroppedBitmap(Bitmap bitmap) {
    int widthLight = bitmap.getWidth();
    int heightLight = bitmap.getHeight();
    
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
            Config.ARGB_8888);
        
    Canvas canvas = new Canvas(output);
    Paint paintColor = new Paint();
    paintColor.setFlags(Paint.ANTI_ALIAS_FLAG);
        
    RectF rectF = new RectF(new Rect(0, 0, widthLight, heightLight));
        
    canvas.drawRoundRect(rectF, widthLight / 2, heightLight / 2, paintColor);
        
    Paint paintImage = new Paint();
    paintImage.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP));
    canvas.drawBitmap(bitmap, 0, 0, paintImage);
        
    return output;
}

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