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🐦 Flappy Bird in C: APK Size < 100 Kilobytes! 🚀

📜 History:

It all started in 2021 when I stumbled upon rawdrawandroid. My goal was simple: to create a game with the minimal APK size, yet still be understandable and interesting. 🎯

The idea of making a Flappy Bird clone seemed logical, given that this game had already been ported to many languages. 🐤

In 2021, I also studied Raylib, but my first attempt to make a game in C++ using ImGui failed. 💔

The problems were everywhere: the APK size was around 1 MB, the game crashed, and the APK only contained the armeabi-v7a library (Google's 2022 requirements state that the arm64-v8a library must be included!). 🤯

💡 Motivation:

In September 2024, seeing Flappy Bird in C# in the Raylib Discord channel, I decided to try implementing this game in C for Android with an APK size of less than 100 KB. 🚀

The idea seemed crazy, but the competitive interest took over. 💪

🛠️ Implementation:

I started by compiling a "Hello World" in C and packaging the library into an APK. 📦

Sounds were compressed to MP3 format, and OpenSLES was used for playback. 🎵

For PNG file decoding, I chose upng. 🖼️

All of this was combined using OpenGL ES 2, shaders, and Android Native Activity. 🎮

🔧 Build:

Visual Studio (Windows)

1. Download Visual Studio 2022.
2. Install components: C++ Desktop Development and C++ Mobile Development.
3. Download Android Studio (for apktool, sdk, ndk).
4. Install NDK 27.1.12297006 and Android SDK Platform 30.
5. Configure the project for "Debug ARM" and make changes to build.bat.
6. Compile via CTRL + B. 🛠️

Linux and macOS (Makefile)

For Linux and macOS users, you can build the project using the provided Makefile:

1. Install the Android command-line tools.
2. Set up your environment variables in a .env file in the project root directory (see .env.example for an example).
3. Build the project:

   cd FlappyBird
   make
   

For more detailed instructions, please refer to BUILDING.md.

The signed APK will be generated at: FlappyBird/app/build/outputs/apk/FlappyBird-signed.apk

📄 Copyright:

I do not claim any copyright. The rights to the game and resources belong to DotGEARS. 📜

🌟 Inspiration:

• rawdrawandroid
• Flapper
• Raylib
• ImGui

🌠 Star History

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🎉 Enjoy the game and don't forget to star it! 🌟