This is the eduVPN / Let's Connect! for Android application.
$ sudo dnf -y install \
unzip \
git \
java-1.8.0-openjdk \
java-1.8.0-openjdk-devel \
ncurses-compat-libs
$ sudo apt -y install openjdk-8-jdk git curl unzip
Generate a key store for signing the Android application:
$ keytool -genkey -v -keystore ${HOME}/android.jks
$ ./builder_setup.sh
$ ./build_app.sh
You'll find the signed output APK in ${HOME}/Projects.