public override void OnWindowFocusChanged(bool hasFocus)
{
base.OnWindowFocusChanged(hasFocus);
if (MainHeaderBottom <= 0)
{
var llTabContainer = FindViewById <View>(Resource.Id.llTabContainer);
int[] locations = new int[2];
llTabContainer.GetLocationInWindow(locations);
MainHeaderBottom = locations[1] - StatusBarTintHelper.GetStatusBarHeight();
var flToolbarBottom = FindViewById <FrameLayout>(Resource.Id.flToolbarBottom);
flToolbarBottom.GetLocationInWindow(locations);
ToolbarHelper.SetToolbarHeight(locations[1] - StatusBarTintHelper.GetStatusBarHeight());
}
llHeader.LayoutParameters.Height = MainHeaderBottom
+ StatusBarTintHelper.GetStatusBarHeight()
+ (int)MainApp.ThisApp.Resources.GetDimension(Resource.Dimension.fixedbar_height);
}