shadowsocks-android

git clone https://github.com/mosabua/maven-android-sdk-deployer.git 
pushd maven-android-sdk-deployer
export ANDROID_HOME=/path/to/android/sdk
mvn install -P 4.1
popd

Build native dependecies

ndk-build
cp libs/armeabi/pdnsd assets/

BUILD

Create your key following the instructions at http://developer.android.com/guide/publishing/app-signing.html#cert
Create a profile in your settings.xml file in ~/.m2 like this

  <settings>
    <profiles>
      <profile>
        <activation>
          <activeByDefault>true</activeByDefault>
        </activation>
        <properties>
          <sign.keystore>/absolute/path/to/your.keystore</sign.keystore>
          <sign.alias>youralias</sign.alias>
          <sign.keypass>keypass</sign.keypass>
          <sign.storepass>storepass</sign.storepass>
        </properties>
      </profile>
    </profiles>
  </settings>

Invoke the building like this

  mvn clean install