(Android)處理圖片成圓形

標籤：

Android將一張Bitmap處理成圓形是十分常見的，經常見的場合就是作為帳戶圖片，我們可以Canvas來輔助實現這個功能，代碼如下

 1 public static Bitmap toRoundCorner(Bitmap bitmap, int pixels) { 2         Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); 3         Canvas canvas = new Canvas(output); 4         final int color = 0xff424242; 5         final Paint paint = new Paint(); 6         final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 7         final RectF rectF = new RectF(rect); 8         final float roundPx = pixels; 9         paint.setAntiAlias(true);10         canvas.drawARGB(0, 0, 0, 0);11         paint.setColor(color);12         canvas.drawRoundRect(rectF, roundPx, roundPx, paint);13         paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));14         canvas.drawBitmap(bitmap, rect, rect, paint);15         return output;16     }

pixels即為圖片的半徑

(Android)處理圖片成圓形