Bitmap src = http://www.mamicode.com/BitmapFactory.decodeResource(getResources(), imageId); //获取Bitmap图片RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), src); //创建RoundedBitmapDrawable对象roundedBitmapDrawable.setCornerRadius(100); //设置圆角半径（根据实际需求）roundedBitmapDrawable.setAntiAlias(true); //设置反走样image.setImageDrawable(roundedBitmapDrawable); //显示圆角图片

Bitmap src =http://www.mamicode.com/ BitmapFactory.decodeResource(getResources(), imageId);Bitmap dst;//将长方形图片裁剪成正方形图片if (src.getWidth() >= src.getHeight()){    dst = Bitmap.createBitmap(src, src.getWidth()/2 - src.getHeight()/2, 0, src.getHeight(), src.getHeight()    );}else{    dst = Bitmap.createBitmap(src, 0, src.getHeight()/2 - src.getWidth()/2, src.getWidth(), src.getWidth()    );}RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), dst);roundedBitmapDrawable.setCornerRadius(dst.getWidth() / 2); //设置圆角半径为正方形边长的一半roundedBitmapDrawable.setAntiAlias(true);image.setImageDrawable(roundedBitmapDrawable);