How does the server that has given the link to the application on Google Play understand that the application has been installed?

Question

Android

I follow the link (from my smartphone) on the site and it sends me to download the application to Google Play, I install and run the application, and the server knows that I did it. How does the server identify the installation on one specific smartphone, what is it attached to?

Answer 1

When you first start the application sends an http request to the server, ala "I was launched." The device id can be obtained like this:

Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID)