Mobile gaming today is an industry that is ahead of the console and computer markets in terms of turnover. Thousands of new projects appear on Google Play every day, and many of them are created by independent developers or small studios starting from scratch. If you are thinking about how to start writing games for Android, then right now you are at the best entry point: the tools have become more accessible, and the barrier to entry is much lower.
However, the path from an idea to a working APK file requires a systematic approach. You will have to understand the choice of game engine, master the basic principles of programming, and understand the logic of working with mobile graphics and interfaces. This is not just code, this is the creation of an entire world that must work on millions of different devices with different characteristics.
In this guide, we will go through the fundamental steps that will turn your desire into a real project. We will not delve into complex mathematical calculations right now, but we will outline the vector of movement necessary for a successful start in the world of mobile development.
Choosing a game engine: the foundation of the project
The first thing a beginner faces is the question of choosing a tool. A game engine is software that handles graphics rendering, physics processing, sound processing, and script processing. There are several market leaders for the Android mobile platform, and the choice depends on your ambitions and the type of game you are creating.
The most popular solution remains Unity. This engine uses the C# language and has a huge community, which is critical for a beginner. If you get stuck, there's probably already a solution to your problem on the forums. Unity allows you to create both 2D and 3D projects of any complexity, from simple clickers to shooters with console-level graphics.
Another powerful player is Unreal Engine, running on C++ or the Blueprint visual system. It is famous for its photorealistic graphics, but can be overkill for simple casual games and is demanding on the resources of the mobile device. For 2D projects, they often choose Godot or Construct 3, which are easier to learn and consume less memory.
⚠️ Attention: The choice of engine determines the programming language you will have to learn. You shouldn't change a tool in the middle of development, so take the time to study the documentation before starting.
It is important to consider optimization. Mobile devices have battery and heat limitations. The engine must manage resources efficiently so that your game doesn't drain your phone in half an hour. Modern engines have built-in profilers that allow you to monitor memory consumption and FPS in real time.
Required knowledge and programming languages
Although there are game designers that allow you to assemble mechanics by dragging blocks, to create something unique, knowledge of the code is necessary. In the context of Android development, several languages dominate, and the choice depends on the previously selected engine.
If your choice fell on Unity, the main language will be C# (C Sharp). It is a strongly typed, object-oriented language that forgives many mistakes for beginners, but requires discipline. For Unreal Engine you will need C++ or understanding of visual programming logic. If you decide to write a native game without an engine, using Android Studio, then the main language will be Kotlin or Java.
Don't be afraid of the volume of information. You don't need to know the whole language by heart. It is enough to understand the basic concepts: variables, loops, conditions, functions and classes. The rest comes with practice. The main thing is to learn how to break a game task into logical sequences of actions.
- 🧠 Algorithmic thinking - the ability to describe actions step by step.
- 💻 Language syntax - rules for writing code so that the computer understands the command.
- 🏗 Architecture —the ability to structure code so that it can be easily edited.
Pay special attention to working with the Android API. Even in engines, you will have to interact with the system: access the gyroscope, vibration feedback, notifications or in-app purchases. Understanding how the application life cycle works (onCreate, onStart, onPause, onDestroy) will save you from many bugs.
Learn English while programming. 95% of high-quality documentation and solutions to errors on StackOverflow are available only in English.
Preparing the workplace and installing the SDK
Before writing the first line of code, you need to prepare the development environment. For Android, this means installing the JDK (Java Development Kit) and Android SDK (Software Development Kit). These components allow the computer to compile the code into a format that the phone's operating system can understand.
The standard tool for native development is Android Studio. Even if you're writing a game in Unity, Android Studio is often required for emulation and debugging. The installation process may take time, as you will need to download several gigabytes of data, including system images for emulators.
In the SDK Manager settings, you need to select the desired versions of Android. It is critical to install platforms not only the latest versions, but also older ones (for example, Android 10 or 11) to test compatibility. The market is fragmented, and your game should work not only on flagships, but also on budget devices.
>Java/Kotlin runtime
>Libraries of a specific OS version
>Virtual device for tests
>Utilities for building APK
| Component | Purpose | Volume (approximately) |
|---|---|---|
| JDK 17+ | ~300 MB | |
| Android SDK Platform | ~2-4 GB | |
| Android Emulator | ~1-2 GB | |
| Build-Tools | ~500 MB |
After installing all components, you need to configure the environment variables in the operating system. This will allow you to run compilation commands from the command line in any folder. For Windows, this is done through the "Environment Variables" menu, where you need to specify the paths to the folders bin installed tools.
Creating the first project and setting up the manifest
When the environment is ready, you can create the project. In any engine, this starts with choosing a template. For an Android game, the key file is AndroidManifest.xml. This is the passport of your application, where access rights, screen orientation, minimum OS version and icon are indicated.
The manifest contains permissions (permissions). If a game requires internet for multiplayer or microphone access for voice chat, this should be explicitly stated. Without permission received from the user during operation, the Android system will simply block access to the function.
Screen orientation is another important parameter. Mobile games are divided into portrait (vertical) and landscape (horizontal). You can change the orientation in the manifest or through the engine settings. For shooters and racing, landscape is usually chosen, for runners and puzzles - portrait.
☑️ Setting up a new project
Do not forget about the uniqueness of the package identifier. View line com.studio.gamename must be unique throughout Google Play. If you try to download an application with an existing ID, the service will reject the file. Come up with the structure of the packages in advance.
Adaptation of the interface for different screens
The Android world is a chaos of resolutions and aspect ratios. From the narrow screens of the old iPhone SE to the wide Samsung blades and foldable devices. Your task is to make the game interface (UI) look equally good on all of them.
The main problem is the “notches”, camera cutouts and rounded corners. Important controls should not be obscured by system elements or extend beyond the visible area. Modern engines use a system of anchors (Anchors) and relative sizes, which allows the interface to stretch proportionally.
Use safe zones (Safe Areas). These are special areas inside the screen, guaranteed to be free from system overlays. Place the "Pause" or "Shoot" buttons inside these areas so that the player can always reach them.
⚠️ Attention: Google Play interfaces and Material Design rules are updated regularly. Always check the official guidelines so that your application is not rejected by moderation for an inconvenient interface.
It is also worth considering support for different pixel densities (DPI). Graphics that look sharp on one screen may become blurry on another. Use vector graphics for the UI or prepare assets in multiple resolutions (1x, 2x, 3x).
Testing, debugging and publishing
Running the game on an emulator is only the first stage. The emulator runs on a powerful PC and does not reflect actual battery consumption or heat. For full testing, you need to connect real Android devices via a USB cable.
Turn on the "For developers" mode on your phone (usually 7 clicks on the build number in the settings) and activate USB debugging. This will allow you to run the game directly from the code editor on your phone and see error logs in real time. Logs are your best friend in finding bugs.
Before publishing on Google Play, you need to prepare a store listing: screenshots, description, age rating. The moderation process takes from several hours to several days. Remember that there is a one-time fee to host a developer app, after which you get access to the developer console.
What is AAB and why are APKs no longer accepted?
As of August 2021, Google Play requires the Android App Bundle (.aab) format instead of APKs. This is a special container that allows Google Play to assemble the optimal version of the application for a specific user device, reducing the download size.
After the release, the work does not end. You need to keep an eye on reviews, crash reports, and update the game. Project support is a marathon, not a sprint. Regular content updates and bug fixes keep the audience engaged.
The success of a mobile game depends 50% on the quality of the code and 50% on the ability to test on real devices before release.
Frequently asked questions (FAQ)
Do you need to know mathematics and physics for creating games?
For simple 2D games, basic arithmetic is enough. However, for 3D projects, understanding vectors, matrices and the basic physics of motion will make life much easier. The engines take care of complex calculations, but it is necessary to understand how the object moves.
How long does it take to create the first game?
A simple clone of Snake or Arkanoid can be made in a weekend if you devote all your time to it. It can take a beginner from 1 to 3 months to create a high-quality prototype with unique mechanics.
Is it possible to create games for Android on a phone?
Technically, there are IDEs like AIDE or Sketchbook, but developing a full-fledged 3D game on a smartphone is extremely inconvenient due to the small screen and lack of a mouse. A PC or laptop is required for serious work.
Do I need to pay for Unity or Unreal Engine?
To start learning and small projects, these engines are free. You only need to pay when your income exceeds a certain threshold (for example, $100k per year for Unity Personal) or you want corporate support.