我试图在位图周围创建一个圆形边框!
使用下面的代码,我能够使我的位图变成圆形:
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap
.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff4242DB;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = bitmap.getWidth()/2;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
//canvas.drawCircle(0, 0, bitmap.getWidth(), paint);
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
我尝试使用canvas画圆(被注释的那行代码),但是没有效果。有谁知道如何在它周围添加一个圆形边框吗?
编辑
当我使用以下代码:
canvas.drawCircle(0, 0, bitmap.getWidth(), paint);
效果是,三个角被圆滑处理,但左上角保持不变(90度)。
但我看不到任何线条或圆形!