Development of mobile applications has ceased to be the lot of select programmers who write code in pure Java or Kotlin. Today, the Microsoft ecosystem offers powerful tools that allow you to create native cross-platform solutions using familiar C# and .NET. Visual Studio has become a hub where design, coding, and testing capabilities come together, turning a complex process into a structured pipeline.
Before diving into the technical details, it is important to understand that Visual Studio is not just a text editor, but a full-fledged integrated development environment (IDE). This is where the magic of compiling and assembling APK files happens, ready to be installed on your smartphone. We will look at the path from installing components to the first launch of the app on the emulator.
The main advantage of working in this environment is deep integration with libraries .NET MAUI (Multi-platform App UI). This allows developers to write business logic once and run it on Android, iOS, macOS and Windows. This approach saves a huge amount of time and resources, making entry into mobile development more accessible for backend and desktop specialists.
However, a beginner may be intimidated by the abundance of settings and tools that the environment offers. Don't panic: the basic functionality to get started can be mastered in a couple of hours. The key point is the correct initial configuration of the environment, which we will talk about later.
Preparing the environment and installing components
The first step to creating a successful Android project is to correctly install the development environment itself. The standard version of Community may not be enough if you do not select the necessary modules during installation. In the Visual Studio Installer, you need to find and mark the workload called .NET Desktop Development and, what is critically important, .NET Multi-platform App UI development.
Without these components, the IDE will not see the necessary SDKs and emulators. After installing the main package, it is worth checking for the Android SDK, which is often included, but may require updating through a separate manager. Make sure that you have at least 10-15 GB of free space reserved on your hard drive, as emulators and system images take up a significant amount of space.
You will also need to activate developer mode on your physical Android device if you plan to test the application on a real gadget and not in a virtual machine. To do this, go to Settings → About phone and click on the build number seven times. After this, an item will appear in the menu For developerswhere you need to enable USB debugging.
It is also important to install the correct version of the .NET SDK that is compatible with your version of Visual Studio. Typically the installer will do this automatically, but in corporate environments version conflicts may occur. Check the relevance of the tools through the menu Tools → Get tools and components.
Creating the first MAUI project
After successful installation of all components, you can begin creating the project. Launch Visual Studio and select option Creating a new project. In the list of templates, filter languages by C# and platform by MAUI. You will see a template .NET MAUI Appwhich is the gold standard for getting started.
When creating a project, the system will prompt you to select a save location and solution name. It is recommended to use Latin characters and avoid spaces in folder names to avoid potential compilation errors in the future. Select a template Blank Appif you want to start from scratch, or Shell Appif you need a ready-made navigation structure.
- 📱 Target Frameworks: In the project properties window that opens, make sure the checkbox opposite
net8.0-androidis active. This will indicate to the environment that we are building an application specifically for the Google platform. - 🎨 MauiProgram.cs: This is the entry point of the application, analogous to Main in console apps. Here services are registered and the start page is configured.
- 📂 Folder structure: Pay attention to the folders
Resources(for images and fonts) andPlatforms(for specific code for Android or iOS).
After creating the project, before You will open a code editor and interface designer. The file MainPage.xaml describes the visual part, and the file MainPage.xaml.cs describes the logic of its operation. Try changing the welcome text in XAML markup to see the changes in real time.
Use the Ctrl+S hotkeys to save and automatically reload the interface in Hot Reload mode, this speeds up the layout significantly.
Don’t be afraid to experiment with the code at this stage. The development environment is equipped with a powerful IntelliSense hint system that will suggest the correct tags and properties. This helps you quickly remember the syntax and structure of the framework.
Interface basics and navigation
The application interface is built in XAML (Extensible Application Markup Language). It is a declarative language similar to HTML, but designed to describe UI in the Microsoft ecosystem. Understanding basic controls is the first step to creating a user-friendly application.
MAUI uses containers to group elements. For example, VerticalStackLayout arranges buttons and text vertically, and Grid allows you to create complex meshes. Each element has a set of properties, such as Margin (padding) and Padding (padding), which affect the appearance.
⚠️ Attention: Development tool interfaces and the names of some properties in .NET MAUI may be updated with the release of new versions of the SDK. Always check the syntax with the official Microsoft documentation if the standard code stops working or is highlighted with errors.
Navigation between pages is implemented through the class Shell. This is a modern approach that provides a unified navigation model for applications. Instead of manually managing a stack of pages, you specify URIs, which makes navigating and deep navigation easier.
| XAML element | Function description | Android Native analogue |
|---|---|---|
<Label> |
Text display | TextView |
<Button> |
Interactive button | Button |
<Entry> |
Single-line text field | EditText |
<Image> |
Graphic display | ImageView |
To add interactivity, you need to bind events to elements. For example, the event Clicked of a button calls a method in C# code. This connects the visual shell with the application logic, allowing you to respond to user actions.
The secret of fast layout
Use #if ANDROID preprocessor directives to write code that will only run on Android devices, ignoring other platforms.
Working with application code and logic
The application logic is written in C#, which is known for its strong typing and security. In the page's code file (for example MainPage.xaml.cs), you create a class corresponding to the markup. All interface elements that have the x:Nameattribute become available as variables in the code.
One of the key concepts is Data Binding (data binding). Instead of manually searching for elements by ID and changing their text, you bind UI properties to properties in your data model. This implements the MVVM (Model-View-ViewModel) pattern, making the code cleaner and more testable.
Let's look at an example of processing a button click. In XAML we specify Clicked="OnCounterClicked", and in C# code we write the method:
private int count = 0;private void OnCounterClicked(object sender, EventArgs e)
{
count++;
CounterBtn.Text = $"Count: {count}";
System.Diagnostics.Debug.WriteLine($"Current count: {count}");
}
This simple code demonstrates working with a variable, updating the interface and outputting debugging information. The method Debug.WriteLine displays messages in the "Output" window in Visual Studio, which is extremely useful for tracking the progress of the app.
☑️ Checking the application logic
When working with asynchronous operations, such as downloading data from the Internet, be sure to use the keywords async and await. This will prevent the interface from freezing while the application waits for a response from the server, providing a smooth user experience.
Debugging and testing on an emulator
Visual Studio comes with a built-in Android device manager. To launch the application, select the target device in the top panel. If there is no physical device, select Pixel_6_API_33 (or a similar emulator). Press the green "Play" button or the F5 key.
The first launch may take several minutes, as the project is being built and the virtual machine is launched. After downloading the emulator, you will see your application. If you make changes to the code while running (Hot Reload), the changes will be applied instantly without restarting.
⚠️ Attention: Emulators require virtualization (VT-x/AMD-V) to be enabled in your computer's BIOS. If the emulator does not start and displays an error, check the BIOS settings and make sure that Hyper-V or Windows Hypervisor Platform is activated in Windows components.
For debugging, use breakpoints. Left-click on the fields to the left of the code line number to place a red dot. When you reach this line, the app will pause and you can inspect the variables.
The Android Device Manager window allows you to take screenshots, change screen orientation and emulate location (GPS). This is an indispensable tool for testing geo-dependent functions without actually moving in space.
Using Hot Reload and Hot Restart allows you to make changes to the UI and C# logic on the fly, which reduces the development cycle by 40%.
Building the release version and publishing
When the application is ready for release, it is necessary switch the build configuration from Debug to Release. In this mode, the code is optimized, debugging symbols are removed, and security checks are enabled. This is a critical step before publishing.
To publish on Google Play, you must sign the application with a digital key. In Visual Studio this is done through the project context menu: Archive → Publish. The creation wizard will tell you how to create a new key or use an existing keystore.
- 🔐 Keystore: The file with the signing key must be stored in a safe place. The loss of this file means the inability to update the application in the future.
- 📦 Format: Google Play requires the format
.aab(Android App Bundle), which optimizes the size of the application for different devices. - 🚀 ProGuard: In Release mode, code obfuscation is enabled, which makes it difficult to reverse engineer your applications.
After a successful build, you will receive a file ready to be uploaded to the Google Play developer console. Don't forget to test the release build on a real device, as code optimization can sometimes reveal hidden bugs that are not noticeable in Debug mode.
Remember that the publishing process requires compliance with a number of Google requirements, including privacy policy and target API level. Visual Studio helps to assemble the technical part, but the legal aspects remain on the conscience of the developer.
Do you need to know Java to work in Visual Studio?
No, to develop on .NET MAUI, knowledge of Java is not required. All logic is written in C#. However, a basic understanding of Android architecture (Activity, Manifest) will be useful for deep customization.
Is it possible to create a game in Visual Studio?
Visual Studio is great for creating 2D and simple 3D games, especially in conjunction with the MonoGame or Unity engine (where VS is used as a code editor). For complex 3D projects, specialized engines are often used.
How much does the finished application weigh?
A basic empty application on MAUI weighs about 15-20 MB in APK format. Using native libraries or heavy resources may increase this size. The AAB format reduces the weight for the end user.
Does this work on macOS?
Yes, Visual Studio for Mac also supports Android development, although the functionality may differ slightly from the Windows version. Visual Studio Code with plugins is also available, but a full-fledged IDE is preferable for beginners.