hide an android app after install and launch it from another app

Hello someone can help me.First of all, sorry i'm from Afghanistan and my English is not good.This translated by Google. I want to write the two programs.

1_ the first program should hide Automatically from launcher after installation

2_ the second program have a button that when clicked launch & run first program.Indeed it's a launcher for first program that Sets setting then launch.

3- how install this two program with one apk.

please tell me how do it. thanks Beforehand.