{"id":13710656,"url":"https://github.com/UdaraAlwis/XFShellAdvThemeing","last_synced_at":"2025-05-06T19:32:21.341Z","repository":{"id":102018984,"uuid":"228668123","full_name":"UdaraAlwis/XFShellAdvThemeing","owner":"UdaraAlwis","description":"Stunning App themes with Xamarin Forms Shell! 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\n\nYou probably already know how to in classic Xamarin.Forms, but how about Setting up App Themes in a Xamarin.Forms Shell App?, now that's what this is for. 😉 \n\nCheck out the blog post: https://theconfuzedsourcecode.wordpress.com/2019/12/26/stunning-app-themes-in-xamarin-forms-shell-projects/\n\nA little sneak peak:\n![Android](/screenshots/PreviewStepByStepDemoAndroid.png)\n\n\u003eHere we're using awesome built-in Xamarin.Forms Dynamic Binding, and Styling features to implement a neat App Theming solution.\n\u003eAn alternative for: https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/theming\n\u003eBut focused on the awesome new paradigm of Xamarin.Forms Shell!\n\n### In a nutshell:\n- Define Theme files with Colors/Fonts/Images/Icons in them\n- Create Styles based on the Theme properties using Dynamic Binding\n- Bind the UI Elements to the Styles created earlier\n- Implement dynamic App Theme selection using MergedDictionaries\n- Use XF.Essentials Preferences API to save App Theme preferences\n\nSample Theme File:\n```xaml\n\u003c?xml version=\"1.0\" encoding=\"UTF-8\" ?\u003e\n\u003cResourceDictionary\n    x:Class=\"XFShellAdvThemeing.Themes.PinkTheme\"\n    xmlns=\"http://xamarin.com/schemas/2014/forms\"\n    xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\"\u003e\n\n    \u003cColor x:Key=\"PrimaryColor\"\u003e#fc0384\u003c/Color\u003e\n    \u003cColor x:Key=\"AccentColor\"\u003e#ffb8dd\u003c/Color\u003e\n    \u003cColor x:Key=\"SecondaryColor\"\u003eWhite\u003c/Color\u003e\n\n    \u003cColor x:Key=\"PageBackgroundColor\"\u003eWhite\u003c/Color\u003e\n    \u003cColor x:Key=\"NavigationBarColor\"\u003e#fc0384\u003c/Color\u003e\n\n    \u003cColor x:Key=\"PrimaryTextColor\"\u003e#3d0020\u003c/Color\u003e\n    \u003cColor x:Key=\"SecondaryTextColor\"\u003e#610033\u003c/Color\u003e\n    \u003cColor x:Key=\"TertiaryTextColor\"\u003e#960050\u003c/Color\u003e\n\u003c/ResourceDictionary\u003e\n```\n\nSample Style:\n\n```xaml\n\u003cStyle x:Key=\"ButtonStyle\" TargetType=\"Button\"\u003e\n    \u003cSetter Property=\"BackgroundColor\" Value=\"{DynamicResource PrimaryColor}\" /\u003e\n    \u003cSetter Property=\"TextColor\" Value=\"{DynamicResource SecondaryColor}\" /\u003e\n    \u003cSetter Property=\"HeightRequest\" Value=\"45\" /\u003e\n    \u003cSetter Property=\"WidthRequest\" Value=\"190\" /\u003e\n\u003c/Style\u003e\n```\n\nSample UI Element: \n\n```xaml\n\u003cButton\n    x:Name=\"ChangeThemeButton\"\n    Clicked=\"ChangeThemeButton_Clicked\"\n    Style=\"{DynamicResource ButtonStyle}\"\n    Text=\"Change App Theme\" /\u003e\n```\n\nDynamic App Theme Switching:\n```csharp\nICollection\u003cResourceDictionary\u003e mergedDictionaries\n\t\t= Application.Current.Resources.MergedDictionaries;\n...\n...\ncase Theme.Pink:\n\tmergedDictionaries.Add(new PinkTheme());\n\tbreak;\n...\n...\n```\n\nSaving Theme Preferences: \n```csharp\nPreferences.Set(\"CurrentAppTheme\", SelectedItem.ToString());\n```\n\nBehold the beauty on Android and iOS...\n![Android](/screenshots/PreviewCollectionAndroid.png)\n![iOS](/screenshots/PreviewCollectioniOS.png)\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FUdaraAlwis%2FXFShellAdvThemeing","html_url":"https://awesome.ecosyste.ms/projects/github.com%2FUdaraAlwis%2FXFShellAdvThemeing","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FUdaraAlwis%2FXFShellAdvThemeing/lists"}