How does Android check for Internet connection?

Android devices detect captive portals requesting a specific URL , that currently is http://connectivitycheck.gstatic.com/generate_204. If they receive a 204 response then there’s connectivity. If they receive a 30x response, then there’s a captive portal in the way.

One of the “Android calling home” functions that is tricky to disable or remove, is the check for internet connectivity after joining a WiFi network . Every Android device requests https://connectivitycheck.gstatic.com/generate_204 after connecting to a wireless network.8 Kas 2018

Android will try gstatic, and if it redirects, then you get a popup for the company/store’s wifi page. Constant requests to connectivitycheck. gstatic.com says this (the correct answer): It’s the method Chrome uses to detect if it has full access to the Internet without being stopped by a captive portal sign in screen.

Check Internet Connection Status In android, we can determine the internet connection status easily by using getActiveNetworkInfo() method of ConnectivityManager object . Following is the code snippet of using the ConnectivityManager class to know whether the internet connection is available or not.