Login with Google+ and LinkedIN using a standard webview (and return result back to the app)

Hello, is it possible to login to Google+ and LinkedIN using a standard webview? What I want to do is the following:

• I have two buttons (one button for Google+, the other one for LinkedIN);
• when I click one of the two a standard webview opens and inside this webview I load some HTML to perform a login;
• when the login process ends, I NEED to send a message back to the app;

Is this possible? How should be built? Should I put this webpage in remote server?

Any comment is appreciated.