Xamarin app automatically switching to dark mode on Android device with dark mode on

user_13465931 0
Viewed 3069

my Xamarin.Forms app (Shell project) keeps automatically switching to dark theme when on an Android phone with dark theme enabled. I don't want this to happen. I tried multiple ways to disable this, but none of them worked. Any idea what's wrong?

The interesting part of the code in AppShell.xaml is:

<?xml version="1.0" encoding="UTF-8"?>
<Shell xmlns="http://xamarin.com/schemas/2014/forms" 
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
       xmlns:retrogamez="clr-namespace:RetroGameZ"
       Title="RetroGameZ"
       x:Class="RetroGameZ.AppShell">
       

    <Shell.Resources>
        <ResourceDictionary>
            <Style x:Key="BaseStyle" TargetType="Element">
                <Setter Property="Shell.BackgroundColor" Value="#049DBF" />
                <Setter Property="Shell.ForegroundColor" Value="White" />
                <Setter Property="Shell.TitleColor" Value="White" />
                <Setter Property="Shell.DisabledColor" Value="#03A6A6" />
                <Setter Property="Shell.UnselectedColor" Value="#D3D3D3" />
                <Setter Property="Shell.TabBarBackgroundColor" Value="#049DBF" />
                <Setter Property="Shell.TabBarForegroundColor" Value="White"/>
                <Setter Property="Shell.TabBarUnselectedColor" Value="#D3D3D3"/>
                <Setter Property="Shell.TabBarTitleColor" Value="White"/>
            </Style>
            <Style TargetType="TabBar" BasedOn="{StaticResource BaseStyle}" />
            <Style TargetType="FlyoutItem" BasedOn="{StaticResource BaseStyle}" />
        </ResourceDictionary>
    </Shell.Resources>

later there are just indvidual components.

android-darkmode xamarin.forms xamarin xamarin.android android
3 Answers

Found the solution for Android:

In MainActivity.cs, before base.OnCreate(), add this line:

AppCompatDelegate.DefaultNightMode = AppCompatDelegate.ModeNightNo;
user_1823310

I tried all solutions above but only the following steps worked for me.

  1. Open MainActivity.cs and add the AppCompatDelegate.DefaultNightMode = AppCompatDelegate.ModeNightNo; as first line of OnCreate method:
protected override void OnCreate(Bundle savedInstanceState)
{
    AppCompatDelegate.DefaultNightMode = AppCompatDelegate.ModeNightNo;

    base.OnCreate(savedInstanceState);
   // ... other Xamarin stuff
}
  1. Open Resources/values/styles.xml and add the line <item name="android:forceDarkAllowed">false</item>:
<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <style name="MainTheme" parent="MainTheme.Base">
    <!-- ... other Xamarin stuff -->
    <item name="android:forceDarkAllowed">false</item>
    <!-- ... other Xamarin stuff -->
  </style>
</resources>

Reference: https://stackoverflow.com/a/64339016/6846888

user_68468880

Assuming you are using Xamarin.Forms embded feature for themes styling mentionned in https://devblogs.microsoft.com/xamarin/app-themes-xamarin-forms/.

Try setting in your App.cs

App.Current.UserAppTheme = OSAppTheme.Light;

If you don't set anything or if you set

App.Current.UserAppTheme = OSAppTheme.Unspecified;

it will follow your os current theme.

user_52282020
Related