how to compile?

Install the gradle + NDK or use android-studio

https://gradle.org/install/

Install the depencies

git clone https://github.com/PurpleI2P/Boost-for-Android-Prebuilt.git -b boost-1_72_0
git clone https://github.com/PurpleI2P/android-ifaddrs.git
git clone https://github.com/PurpleI2P/OpenSSL-for-Android-Prebuilt.git
git clone https://github.com/PurpleI2P/MiniUPnP-for-Android-Prebuilt.git

Set libs in jni/Application.mk on 24 line:

# change to your own
I2PD_LIBS_PATH = /home/user/i2pd/android/

compile apk file

gradle clean assembleRelease