- Install jdk.
- Generate app keystore by commond keytool -genkey -alias Hin2n -keystore Hin2n.jks. And remember these two passwords:

  keytool -genkey -dname "CN=Unknown,O=Unknown,C=Unknown" -keystore Hin2n.jks -keysize 1024 -alias Hin2nalias -validity 14000 -keypass yourpassword -storepass yourpassword

- Move Hin2n.jks to android/Hin2n/app directory. We will use this file to sign the application
- In the file app/build.gradle replace "yourpassword" with the password used to generate the keystore.


- Download android tools from https://developer.android.com/, and unzip it.

- Install android development environment.
echo y | ./tools/bin/sdkmanager tools
echo y | ./tools/bin/sdkmanager platform-tools
echo y | ./tools/bin/sdkmanager ndk-bundle
echo y | ./tools/bin/sdkmanager "cmake;3.6.4111459"
echo y | ./tools/bin/sdkmanager "lldb;3.1"

- Set environment variables.
export ANDROID_HOME=YOUE_ANDROID_DEV_HOME
export ANDROID_NDK_HOME=$ANDROID_HOME/ndk-bundle
export HIN2N_KSTOREPWD=YOUR_APP_KEYSTORE_PASSWORD
export HIN2N_KEYPWD=YOUR_APP_KEY_PASSWORD

- Compile the app.
cd android/Hin2n
./gradlew assemble

- You will get the app in android/Hin2n/app/build/outputs/apk/ directory.