As Flutter 2 supporting Building Windows, MacOSX and Linux Desktop Software. This is a talk to talking about How to build your 1st App on Linux. Covering FFI (foreign function interface). How to port your native C libraries to Dart (Flutter) via FFI.

1. 用Flutter 開發Linux Desktop
Application
Hong Kong Linux User Group - wanleung
HKOSCON 2021

2. Flutter
Flutter is Google’s UI toolkit for building beautiful, natively compiled applications
for mobile, web, and desktop from a single codebase.

3. Flutter Supports
- Android
- iOS
- Web App for Chrome

4. Desktop Support for Flutter
Beta Snapshot in Stable Channel
- Linux (My Test on Ubuntu/PopOS)
- Windows
- Mac

5. Requirements

6. Requirements

7. Setup

8. Running

9. Build

10. Pros
- Using almost the same code to supports all platforms
- Flutter is fast growing
- New Dart libraries are being supporting all platforms
- Native Libraries and codes are possible to support different native code, such
as Java, Obj-C, Kotlin, Swift, C, for native platforms.
- Calling C functions via ffi binding

11. Cons
- Not every UX are possible to fit into different platforms.
- To be aware that some Dart Libraries are not supported the Desktop version
yet.
- To compile the Flutter code to native, you need the native platform. For
Windows you need to compile on Windows; For Mac you need to compile on
MacOSX; For Linux you need to compile on Linux.
- Not enough documents for the ffi about how to link up to your C lib.

12. Example

13. test.h

14. test.c

15. testlibrary.dart

16. testlibrary.dart

17. testlibrary.dart

18. main.dart