Sign In Users

Before your app can use Google+ features such as creating interactive posts and fetching profile and people information, users must sign in with their Google accounts.

To allow users to sign in, integrate Google Sign-In into your app. When you initialize the GoogleApiClient object, request the PLUS_LOGIN and PLUS_ME scopes. For example:

mGoogleApiClient = new GoogleApiClient.Builder(this)
    .enableAutoManage(this /* FragmentActivity */,
                      this /* OnConnectionFailedListener */)
    .addApi(Plus.API)
    .addScope(Scopes.PLUS_LOGIN)
    .addScope(Scopes.PLUS_ME)
    .build();

When you create the sign-in button, keep in mind the branding guidelines. In particular, when you request social scopes, you should use the red sign-in button with the Google+ logo.

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Google+ Platform for Android
Google+ Platform for Android