Android: Additional data download

Hi.My android apk is bigger than 50 mb so i decided to make a apk which is smaller and the user download thet apk and wheni the apk start, will start download the data for the game; I think i can do this like that: 1.Make an asset bundle (with all my assets) 2.When the smallest apk start download the asset bundle and put it in sdcard....dat/com.MyCompany.myapp 3.Load the asset bundle in the final apk How I can do all of this, please help me. If there is another way for do this please tell me.

Sory for my poor English.