Android圆形图片的实现以及设置边缘颜色、宽度

Android圆形图片的实现以及设置边缘颜色、宽度

	/**
     * 设置圆形图片以及指定边缘颜色、宽度
     *
     * @param context context对象
     * @param avatar  图片
     * @param color   边缘颜色
     * @param value   边缘宽度
     * @return 图片
     */
    public static Bitmap getCircleAvatar(Context context, Bitmap avatar, int color, int value) {
        // TODO Auto-generated method stub
        Bitmap bitmap = Bitmap.createBitmap(avatar.getWidth(), avatar.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setColor(Color.BLACK);
        canvas.drawCircle(avatar.getWidth() / 2, avatar.getHeight() / 2,
                avatar.getWidth() / 2 < avatar.getHeight() / 2 ? avatar.getWidth() / 2 : avatar.getHeight() / 2,
                paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(avatar, 0, 0, paint);
        //设置图片边缘颜色
        paint.setColor(color);
        paint.setStyle(Paint.Style.STROKE);
        //进行单位变换
        float strokeWidth =
                TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, value,
                        context.getResources().getDisplayMetrics());
        paint.setStrokeWidth(strokeWidth);
        canvas.drawCircle(avatar.getWidth() / 2, avatar.getHeight() / 2,
                avatar.getWidth() / 2 < avatar.getHeight() / 2 ? avatar.getWidth() / 2 : avatar.getHeight() / 2
                        - strokeWidth / 2, paint);
        return bitmap;
    }