Requires a build of the latest Android toolchain downloadable here,
an Android NDK as well as [the Gradle plugin]
(https://github.com/SwiftJava/swift-android-gradle) on a Ubuntu 15 System. The phone must be api 21
aka Android v5+ aka Lollipop or better (I used an LG K4.) Make sure the version of swiftc in the
toolchain appears first in your path and there is a swift-build from a swift.org toolchain in the
path and finally, that the ANDROID_NDK_HOME environment variable is set to the path to the NDK.
To create a new application, decide on a pair of interfaces to connect to and from your Swift
code and place them in a Java Source.
Use the command ./genswift.sh in the SwiftJava Project
to generate Swift (& Java) sources to include in your application or adapt the
genhello.sh script.
If you only use interfaces/protocols, your app's only
Package.swift
dependency should be the core JNI interfacing code java_swift.
Simple demo of Swift code accessed over JNI.
To build, setup the Gradle plugin, then run ./gradlew installDebug
This demo is licensed under the Creative Commons CC0 license: do whatever you want.