[C#/MAUI/.NET6] Application 클래스 : RequestedThemeChanged 이벤트를 사용해 현재 테마 변경시 처리하기

TestProject.zip

0.15MB

▶ Platforms/Android/MainActivity.cs

using Android.App;
using Android.Content.PM;
using Android.OS;

namespace TestProject;

/// <summary>
/// 메인 액티비티
/// </summary>
[Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize |
     ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
public class MainActivity : MauiAppCompatActivity
{
}

 

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▶ MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">
    <Label x:Name="label"
        HorizontalTextAlignment="Center"
        VerticalTextAlignment="Center"
        FontSize="48" />
</ContentPage>

 

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▶ MainPage.xaml.cs

namespace TestProject;

/// <summary>
/// 메인 페이지
/// </summary>
public partial class MainPage : ContentPage
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 생성자 - MainPage()

    /// <summary>
    /// 생성자
    /// </summary>
    public MainPage()
    {
        InitializeComponent();

        Application application = Application.Current;

        application.RequestedThemeChanged += application_RequestedThemeChanged;
        Loaded                            += ContentPage_Loaded;
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Private
    //////////////////////////////////////////////////////////////////////////////// Event

    #region 애플리케이션 요청 테마 변경시 처리하기 - application_RequestedThemeChanged(sender, e)

    /// <summary>
    /// 애플리케이션 요청 테마 변경시 처리하기
    /// </summary>
    /// <param name="sender">이벤트 발생자</param>
    /// <param name="e">이벤트 인자</param>
    private void application_RequestedThemeChanged(object sender, AppThemeChangedEventArgs e)
    {
        ChangeTheme(e.RequestedTheme);
    }

    #endregion
    #region 컨텐트 페이지 로드시 처리하기 - ContentPage_Loaded(sender, e)

    /// <summary>
    /// 컨텐트 페이지 로드시 처리하기
    /// </summary>
    /// <param name="sender">이벤트 발생자</param>
    /// <param name="e">이벤트 인자</param>
    private void ContentPage_Loaded(object sender, EventArgs e)
    {
        ChangeTheme(Application.Current.RequestedTheme);
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////// Function

    #region 테마 변경하기 - ChangeTheme(theme)

    /// <summary>
    /// 테마 변경하기
    /// </summary>
    /// <param name="theme">테마</param>
    private void ChangeTheme(AppTheme theme)
    {
        if(theme == AppTheme.Light)
        {
            BackgroundColor = Colors.White;

            this.label.TextColor = Colors.Black;
        }
        else
        {
            BackgroundColor = Colors.Black;

            this.label.TextColor = Colors.White;
        }

        this.label.Text = theme.ToString();
    }

    #endregion
}