Android APK path is not specified for "android"

 In order to do so you just need to follow this steps:
Open Project structure (F4 on one of the modules in the project explorer)
Click on Project tab on the left
Define "Project compiler output:" as YOUR_PROJECT_PATH\out (or
any folder you want)
Click on Modules tab on the left
Go over all your modules and verify that under the Paths tab the Compiler output is set to"Inherit
project compile output path"
Thats it...