float offset = 0.22f * getResources().getDisplayMetrics().widthPixels;
        float width = getResources().getDisplayMetrics().widthPixels - offset;
        DrawerLayout.LayoutParams params =
                (android.support.v4.widget.DrawerLayout.LayoutParams) navView.getLayoutParams();
        params.width = (int) width;
        navView.setLayoutParams(params);