Mvvmcross Xamarin Forms Navigation page style not working - xamarin

Question

I'm trying to style Navigation page on xamarin forms app with Mvvmcross.
before "adding" mmvcross I've defined style in App.xaml as follows.
<Style TargetType="NavigationPage">
<Setter Property="BarBackgroundColor" Value="Black" />
<Setter Property="BarTextColor" Value="White" />
</Style>
and it worked. I got background color and text color as i defined. Then we "moved" to Mvvmcross - we added all needed backend code, changed all pages from ContentPage to MvxContentPage etc and... background color of navigation page stopped working on Android (I haven't tried on iOS). If i change BarTextColor in App.xaml changes apply, color is changed. if i change BackgroundColor it also works - all application background color is changed. but no matter what value i apply to BarBackgroundColor it is still white.
my App.xaml is as follows:
<?xml version="1.0" encoding="utf-8" ?>
<core:MvxFormsApplication xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:views="clr-namespace:MvvmCross.Forms.Views;assembly=MvvmCross.Forms"
xmlns:viewModels="clr-namespace:MvvmCross.ViewModels;assembly=MvvmCross"
xmlns:core="clr-namespace:MvvmCross.Forms.Core;assembly=MvvmCross.Forms"
xmlns:attributes="clr-namespace:MvvmCross.Forms.Presenters.Attributes;assembly=MvvmCross.Forms"
x:Class="ShowMeTheLogs.Core.FormsApp">
<core:MvxFormsApplication.Resources>
<!--Global Styles-->
<Color x:Key="ColorPrimary">#98C340</Color>
<Color x:Key="ColorError">#CF1212</Color>
<Color x:Key="ColorWarning">#E4AD17</Color>
<Color x:Key="ColorInfo">#1283CF</Color>
<Color x:Key="ColorDebug">#989898</Color>
<Style TargetType="NavigationPage">
<Setter Property="BarBackgroundColor" Value="{StaticResource ColorPrimary}" />
<Setter Property="BarTextColor" Value="White" />
</Style>
<Style x:Key="SubmitButton" TargetType="Button">
<Setter Property="BackgroundColor" Value="{StaticResource ColorPrimary}" />
<Setter Property="TextColor" Value="White" />
</Style>
<Style x:Key="circleButton" TargetType="Button">
<Setter Property="BackgroundColor" Value="{StaticResource ColorPrimary}" />
<Setter Property="BorderRadius" Value="50" />
<Setter Property="WidthRequest" Value="100" />
<Setter Property="HeightRequest" Value="100" />
<Setter Property="TextColor" Value="White" />
<Setter Property="FontSize" Value="50" />
</Style>
<Style x:Key="smallSquareButton" TargetType="Button">
<Setter Property="BackgroundColor" Value="{StaticResource ColorPrimary}" />
<Setter Property="WidthRequest" Value="100" />
<Setter Property="HeightRequest" Value="100" />
<Setter Property="TextColor" Value="White" />
<Setter Property="FontSize" Value="Micro" />
<Setter Property="HorizontalOptions" Value="Center" />
<Setter Property="VerticalOptions" Value="Center" />
</Style>
</core:MvxFormsApplication.Resources>
</core:MvxFormsApplication>
my App.xalm.cs is the simpliest as it can be:
public partial class FormsApp: MvxFormsApplication
{
public App()
{
InitializeComponent();
}
}
and the simpliest view:
<?xml version="1.0" encoding="utf-8" ?>
<views:MvxContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:views="clr-namespace:MvvmCross.Forms.Views;assembly=MvvmCross.Forms"
x:TypeArguments="viewModels:WebAppListViewModel"
x:Class="ShowMeTheLogs.Core.Views.WebAppListPage"
xmlns:bindings="clr-namespace:MvvmCross.Forms.Bindings;assembly=MvvmCross.Forms"
xmlns:viewModels="clr-namespace:ShowMeTheLogs.Core.ViewModels;assembly=ShowMeTheLogs.Core"
Title="Sample title"
NavigationPage.HasBackButton="False">
<ContentPage.ToolbarItems>
<ToolbarItem x:Name="AddNewApp" Order="Secondary" Text="Dodaj aplikację" Priority="0" Command="{bindings:MvxBind NewWebAppCommand}"/>
</ContentPage.ToolbarItems>
<RelativeLayout Padding="0" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
<Non relevant="Code" />
</RelativeLayout>
</views:MvxContentPage>
I have literally no idea why it is not working. the only change in androud code was changing class RootActivity: CompatActivity to class RootActivity: MvxFormsAppCompatActivity
have enyone fought this problem before?
packages were obtained from NuGet
- MvvmCross (and MvvmCross.Forms) ver 6.2.2
- Xamarin ver 28.0.0
- Xamarin.Forms ver 3.4.0

Answer 1

In your MainActivity OnCreate method, make sure the two lines setting the Toolbar resource are before the base.OnCreate() call:
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(bundle);
}
https://github.com/MvvmCross/MvvmCross/issues/2301