A custom build of jxcore is required. Android NDK jxcore
git clone https://github.com/jxcore/jxcore.git
cd jxcore
git submodule init && git submodule update
build_scripts/android-configure.sh ~/android-ndk-r10e/
build_scripts/android_compile.sh ~/android-ndk-r10e/ --embed-leveldown
Then we need to update the jxcore binaries to include leveldown