ApkServInject - a tool for injecting (smali) service to Android apk files
usage: java -jar ApkServInject.jar [-a APK] [-s SMALI]
-a,--apk APK file to inject smali
-s,--smali (smali) Service file to inject.
This software is not working stable for every Android Package (esp. for complex applications). If you want to contribute in this project, there is a todo.txt in .idea folder.