BitmapUtils.java

public class BitmapUtils {
      public static Bitmap cropCircleCenterBitmap(Bitmap bitmap) {
        int size;
        int x;
        int y;
        // calculate square bitmap
        if (bitmap.getWidth() >= bitmap.getHeight()) {
            x = bitmap.getWidth() / 2 - bitmap.getHeight() / 2;
            y = 0;
            size = bitmap.getHeight();
        } else {
            x = 0;
            y = bitmap.getHeight() / 2 - bitmap.getWidth() / 2;
            size = bitmap.getWidth();
        }
        Rect source = new Rect(x, y, x + size, y + size);
        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, size, size);
        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        canvas.drawCircle(size / 2, size / 2, size / 2, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(bitmap, source, rect, paint);
        return output;
    }
}