README.md

uniffi-android

A basic app to generate uniffi bindings and run it in an android application.

The business logic was obtained from here.

Usage

Inside the geometry dir, run this to generate the Kotlin bindings.

cargo build --release --target x86_64-linux-android --target i686-linux-android --target armv7-linux-androideabi --target aarch64-linux-android

This will generate jni binaries inside the target directory. The next command can be used to copy these binaries into a ABI compliant directory (rename also).

mkdir -p jniLibs/arm64-v8a/ && \
  cp target/aarch64-linux-android/release/*.so jniLibs/arm64-v8a/libuniffi_geometry.so && \
  mkdir -p jniLibs/armeabi-v7a/ && \
    cp target/armv7-linux-androideabi/release/*.so jniLibs/armeabi-v7a/libuniffi_geometry.so && \
  mkdir -p jniLibs/x86/ && \
    cp target/i686-linux-android/release/*.so jniLibs/x86/libuniffi_geometry.so && \
  mkdir -p jniLibs/x86_64/ && \
    cp target/x86_64-linux-android/release/*.so jniLibs/x86_64/libuniffi_geometry.so

Generate the Kotlin bindings.

cargo run --features=uniffi/cli --bin uniffi-bindgen generate src/geometry.udl --language kotlin

After creating your android application

1. Add JNA deps

// ...
    implementation "net.java.dev.jna:jna:5.13.0@aar"
// ...

2. copy:

• geometry/jniLibs -> app/src/main
• geometry/src/uniffi -> app/src/main/java

3. Now on the Android application, you should be able to access the uniffi lib using uniffi.geometry.

Application

This application takes in coordinates for two points and calculates its gradient and displays as a toast.

Screenshots