Fix for Right-To-Left language (Eg, Arabic)

[namanhams]

Fixes #58

[bouchnafamd]

This fix is not working

[behelit]

I think you also need to apply similar logic to the updateBackground() method, so that it applies the margins correctly.
E.g:

        final boolean isLTR;
        isLTR = Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1 ||     (TextUtils.getLayoutDirectionFromLocale(getContext().getResources().getConfiguration().locale) == LAYOUT_DIRECTION_LTR);

        LayoutParams initParams = (LayoutParams) child.getLayoutParams();
        LayoutParams params = new LayoutParams(initParams.width, initParams.height, initParams.weight);
        // Check orientation for proper margins
        if(getOrientation() == LinearLayout.HORIZONTAL)
        {
            if(isLTR)
            {
                params.setMargins(0, 0, -mMarginDp, 0);
            }
            else
            {
                params.setMargins(-mMarginDp, 0, 0, 0);
            }
        }
        else
        {
            params.setMargins(0, 0, 0, -mMarginDp);
        }
        child.setLayoutParams(params);

[dmsherazi]

@behelit Your snippet works to an extent but still the left radius of the first radiobutton.