julia android example

Julia Android Example

You can also download the APK releases from the release page.

Build the Standalone C++ Project

P.S: You don't need to build it again as I placed the prebuilt C++ files in native/libheat.

In order to proceed the code generation, you will need SyslabCC which is a Julia AOT compiler bundled in MWORKS.Syslab.

> scc build.jl -o libheat.dll --no-blas> ls .syslabcc-cache/libheat/
atomic_ops  bin             juliamk.jl  libheat.cpp  make.jl   syslabcrt-dylib       syslabcrt-io
bdwgc       ghc-filesystem  lib         libheat.h    Makefile  syslabcrt-intrinsics  win32-implib

Then you copy contents in .syslabcc-cache/libheat/ into native/libheat.

Build the Flutter Project

You need to have an Android mobile device to run the app.

This project also shall build on Linux x64/aarch64, but it might not build on Windows as SyslabCC released on 2024/06 does not support MSVC (The recent one has supported Window/macOS build but it is not yet available publicly).

# debugging mode for Flutter Android uses 32-bit ABIflutter run# flutter run -d <your android phone device id>

For more details, see Debug Flutter apps.

Patches

I use Rust to build the Julia-generated C++ project and integrate them into Flutter.

However, the generated library requires libc++_shared.so on Android. I use patches from this:

1. Modifying android/app/build.gradle according to commit aa78bf1

2. Addint the following lines to native/hub/build.rs:

   let target_os = std::env::var("CARGO_CFG_TARGET_OS");match target_os.as_ref().map(|x| &**x) {    Ok("android") => {        println!("cargo:rustc-link-lib=dylib=stdc++");        println!("cargo:rustc-link-lib=c++_shared");    },
       _ => {}}