我尝试使用圆角进行imageview.但我面临一些问题.我不能为所有四个方面制作圆角.我试过这段代码

Imageviewclass.class
Picasso.with(con).load(itemsArrayList.get(position).get(“item_image”)).transform(new Resizeimageview()).into(holder.img);
ResizeImageview.class

public class Resizeimageview implements Transformation {
    @Override
    public Bitmap transform(Bitmap source) {
        int size = Math.min(source.getWidth(), source.getHeight());

        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;

        Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
        if (squaredBitmap != source) {
            source.recycle();
        }

        Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());

        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint();
        BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
        paint.setShader(shader);
        paint.setAntiAlias(true);

        float r = size / 8f;
        canvas.drawRoundRect(new RectF(0, 0, source.getWidth(), source.getHeight()), r, r, paint);
        squaredBitmap.recycle();
        return bitmap;
    }

    @Override
    public String key() {
        return "rounded_corners";
    }
}

最佳答案 尝试更换此行

canvas.drawRoundRect(new RectF(0, 0, source.getWidth(), source.getHeight()), r, r, paint);

有了这个

canvas.drawRoundRect(new RectF(0, 0, size, size), r, r, paint);