Get the Whitepaper called Demystifying the Android Malware. It dives into various phases to discuss the hows and whys behind malware implementation for Android.
You can download it from the following link: https://packetstormsecurity.com/files/download/104458/demystifying-android.pdf
Source: https://packetstormsecurity.com/files/104458/Demystifying-The-Android-Malware.html