Ionic and Laravel ip address

I am working on Ionic app where backend is done with Laravel. Can anyone tell me which ip address to add in providers when I want to test application on real device or in emulator. While I was working in browser my address was http://localhost:8000/ but when I try to aim that address from real device or emulator, app doesn’t work. I also tried to create virtual host with custom ip address and I tried with my ip address but that didn’t work. These are my mistakes in console.