This is demo application implementing Google Sign-in in android application. Screenshots of the application are when you click on the sign in button popup will be shown to select google account for sign in . After signing in , user can see his profile photo,name and Email id in the login screen . User can sign out using signout button . Disconnect button will provide user ability to disconnect their google account from the app. Before we start coding for our application , we need to turn on sign-in API for our app in google developer console. Go to this link to know how to turn on google sign-in api for our app https://androidtuts4u.blogspot.com/2019/09/enabling-sign-in-api-in-google.html now we successfully configured Google Api console project . we can start coding our application. I . first we need to configure build.gradle file we need to add two dependencies 1. google play service dependency for google sign-in. 2 ....