How to Embed a Payload into an Apk

Hey Guys

I read this Blogpost about embedding an SMS forwarder into an apk

http://insiderattack.blogspot.com.tr/2013/09/android-malware-injection-into-original_5.html

and i was wondering if i could do that with a reverce_tcp Payload.

I built the reverse_tcp paylaod apk with msfvenom and then i decompiled it with apktool and basically done what is mention in the blog. I built it and ran it but i couldnt get it to work (my listener didnt recieve anything)

So now my question is is it actually possible to embed a payload into another apk and if so what is the right way to do it?

BTW: This is my first post so go easy