Android studio emulator not showing cordova\ioninc app while emulator is running

i created an app on ionic Framework after making enough work on ionic App I want to test my app on android emulator that’s why i have installed android studio and all its dependence after many struggle:) and added android platform in my ionic app, but when i
issue this command in my android studio

ionic emulate android

it show me the emulator but not showing my app. I don’t know what is the problem. my All files are there in project (in assert\www directory)
my emulator not showing my app while emulator is running. What is the problem how to run\show my app on emulator???