I'm thinking about using Google Accounts as a user verification for a service I'm developing. This will be a client and server. I'm hoping to be able to use the already signed-in Google Account on the Android phone and use that as a verification on my server.
Where can I find information about this?
Is it possible to use the already signed-in account on the phone or do I have to re-sign-in in my application?
If you have a Google account, you can log in with that. Steps. Go to Google. Go to google.com or search for Google in your browser's search box. Click on Sign in. The blue Sign in button is on the upper-right corner. Enter your email address and click on Next. You can also use your phone number to sign in.
With a Google Account, you have access to free Google products like Drive, Docs, Calendar, and more. To sign in to your Google Account (or any Google product): Go to the sign in page of the product (for Google Accounts it is myaccount.google.com ).
Use your Google Account to sign in to other apps or services You can use your Google Account to sign in to third-party apps and services. You won't have to remember individual usernames and passwords for each account. Third-party apps and services are created by companies or developers that aren’t Google.
On your device, go to a Google page, like www.google.com. On the top right, select your profile image or initial. On the menu, choose Sign out or Sign out of all accounts. On your device, go to a browser where you're signed in, like Chrome.
There's a class called AccountManager
which acts like a registry for the users online account. I think this is what you are looking for.
There's also something called Federated Login for Google, which allows users to login using their Google Account. Its more like OpenID
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