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Is a cross-platform technology that makes it possible to build native applications for Android and iOS using a single, shared codebase. Like other technologies such as React Native and NativeScript, it allows development teams to spend less time writing code for both platforms. Xamarin is open-source (and free). Under the hood, it uses Mono (a version of the Microsoft.NET runtime), so Xamarin apps are usually written in C#.

You can build Xamarin apps on Windows using Visual Studio, or Mac using Visual Studio for Mac. Even though Xamarin apps are not written in Swift (or Java), they still look and feel like real, native apps on the device. In this tutorial, I’ll show you how to use Xamarin to build a basic app for both iOS and Android, even if you’ve never done any app development before! Android emulator mac failed.

Set Up Xamarin on Windows Skip to the next section if you have a Mac! If you don’t have Visual Studio installed, download the from Microsoft. When you install Visual Studio, be sure to pick the Mobile development with.NET workload, which installs the Xamarin tools you need: If Visual Studio is already installed, open the Visual Studio Installer to make sure you have the above workload selected. Once you have these tools installed, you’re ready to create a Xamarin project! Skip the next section.

Set Up Xamarin on Mac If you have a Mac, you’ll need to install Visual Studio for Mac. Follow the to install the free Community Edition. Once the application is installed, you’re ready to create a Xamarin project! Xamarin and Xamarin Forms The base Xamarin SDK contains API bindings for each mobile platform, so you can call Android or iOS APIs from C# code.

This allows you to build native apps using shared C# code, but you still need to design the UI separately for each platform. Is an additional library that makes it possible to build your UI once (in XAML, a markup language for describing UI layouts). Xamarin.Forms then does the hard work of translating your XAML layout into the appropriate UI elements on the target platform.

You can drop down to the “lower” Xamarin SDK level and interact with the platform APIs whenever you need to. Deciding whether to use Xamarin.Forms in your project depends on how complex your app is. If you’re building an app that needs UI ultra-tailored for each platform or includes a lot of complex user interactions (such as a game), you’re better off with base Xamarin. However, if you’re building a straightforward app that doesn’t need much platform-specific functionality or custom UI, using Xamarin.Forms means you can write even less code. Data-entry apps, productivity tools, and prototypes are great candidates. Since the goal of this tutorial is building a simple demo app, you’ll use Xamarin.Forms here! Create a New Xamarin.Forms Project In Visual Studio, choose File - New Project, pick the Cross-Platform category, and choose the Cross-Platform App (Xamarin.Forms) template.

Name the project HelloWorldApp. Then, pick the Blank App template and the platforms you want to build the app for. Choose Xamarin.Forms as the UI Technology, and.NET Standard as the Code Sharing Strategy: In Visual Studio for Mac, choose File - New Solution, pick the Multiplatform - App category, and choose the Blank Forms App template: Creating the new project may take a few minutes. The Blank App template creates a solution with a few sub-projects: • HelloWorldApp: Contains the XAML and shared code for each platform-specific project.

• HelloWorldApp.Android (or Droid): Android-specific code. For a simple project, you won’t have to change much here.

• HelloWorldApp.iOS: iOS-specific code. You won’t have to change much here, either. If you picked Windows (UWP) as a platform, your solution will contain an additional project targeting Windows devices. In this tutorial, you’ll only need to modify the shared code project: HelloWorldApp. Add a Page UI views are called “pages” in Xamarin.Forms lingo, and your app already contains one called MainPage (or HelloWorldAppPage in Visual Studio for Mac). Double-click the XAML file in the Solution Explorer, and replace everything within the tags with this markup.

This XAML markup creates a basic layout containing Label, Entry (text box), and Button elements. The element names (specified with x:Name) will be used to refer to these elements later in code. These XAML elements are generic and aren’t yet tied to a specific platform. Xamarin.Forms will automatically translate the elements in proper UIButton or EditText views when your app runs on iOS or Android. The Clicked attribute on the Button element wires up the button click event to a handler called SayHelloButtonClicked, which doesn’t exist yet.

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