EasyLogin

Easy Login in your app with different social networks.
Currently supported:

• Facebook
• Google Plus
• Twitter

Global Configuration

To be able to use one of the social network connections you need to create an EasyLogin instance:

EasyLogin.initialize();
EasyLogin easyLogin = EasyLogin.getInstance();

Also make sure to call through to EasyLogin in onActivityResult() of your Activity:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  easyLogin.onActivityResult(requestCode, resultCode, data);
}

Afterwards you can connect to the social networks one by one.

Facebook Connection

To connect to facebook you need to do the following:

• First of all you need to init a list of permissions you want to take:
  List<String> fbScope = Arrays.asList("public_profile", "email");
• Add the facebook social network:

  easyLogin.addSocialNetwork(new FacebookNetwork(this, fbScope));
  

• Add the Facebook LoginButton and the listeners:

  facebook = (FacebookNetwork) easyLogin.getSocialNetwork(SocialNetwork.Network.FACEBOOK);
  
  LoginButton loginButton = (LoginButton) findViewById(R.id.facebook_login_button);
  // Call this method if you are using the LoginButton provided by facebook
  // It can handle its own state
  facebook.requestLogin(loginButton, this);
  

• In the next step you will get an onSuccess() or onError() callback. The easiest solution is to implement the OnLoginCompleteListenerin your activity and handle all the connections there.

You also need to make sure to add the Facebook ApplicationId in your manifest:

If an email permission is requested, the library also does a /me request on the facebook graph api to try to fetch the email.

Note that it is still not guaranteed that you will get an email because the user might not have a valid / verified email or signed up with a telephone number. So I would advise to use the userId for figuring out the user identity.

Twitter Connection

One gotcha of using the Twitter Social connection is to create the TwitterNetwork before calling to setContentView() as Twitter would complain otherwise.

// Initialization needs to happen before setContentView() if using the LoginButton!
easyLogin.addSocialNetwork(new TwitterNetwork(this, twitterKey, twitterSecret));

setContentView(R.layout.activity_main);

twitter = (TwitterNetwork) easyLogin.getSocialNetwork(SocialNetwork.Network.TWITTER);
twitterButton = (TwitterLoginButton) findViewById(R.id.twitter_login_button);
twitter.requestLogin(twitterButton, this);

If you also want to request an email from the Twitter use, use twitter.setAdditionalEmailRequest(true);
Make sure that your app has the ‘Request email addresses from users’ checkbox checked in the Twitter app permission settings.

Note that it is still not guaranteed that you will get an email because the user might have signed up with a telephone number. So I would advise to use the userId for figuring out the user identity.

Google Plus Connection

easyLogin.addSocialNetwork(new GooglePlusNetwork(this));
gPlusNetwork = (GooglePlusNetwork) easyLogin.getSocialNetwork(SocialNetwork.Network.GOOGLE_PLUS);

gPlusButton = (SignInButton) findViewById(R.id.gplus_sign_in_button);
gPlusButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        if (!gPlusNetwork.isConnected()) {
            gPlusNetwork.requestLogin(MainActivity.this);
        }
    }
});

You can pass a reference to the SignInButton to the SocialNetwork by calling gPlusNetwork.setSignInButton(gPlusButton);. This will make sure to disable and enable the button on connection state changes. Unfortunately the state is not handled automatically inside the Button like the facebook button does.

As the state is not handled by the SignInButton you may need to call silentSignIn() in your onStart() to be logged in again. You will get a callback. For more info check the sample project.
If you call silentSignIn() make sure to set a listener before.

You also need to include a valid google-services.json file in your project to be able to use G+:
For more information you can consult the official docs.

Callbacks

 public class MainActivity extends AppCompatActivity implements OnLoginCompleteListener {
 
 [...]
 
 @Override
 public void onLoginSuccess(SocialNetwork.Network network) {
     // You can check the network by e.g.: if (network == SocialNetwork.Network.FACEBOOK) 
     AccessToken token = network.getAccessToken();
     Log.d("MAIN", "Login successful: " + token.getToken());
 }
 
 @Override
 public void onError(SocialNetwork.Network socialNetwork, String errorMessage) {
     Toast.makeText(getApplicationContext(), errorMessage, Toast.LENGTH_SHORT).show();
 }

Download

The library is available through jcenter().

After that you can easily include the library in your app build.gradle:

dependencies {
	        implementation 'com.maksim88:EasyLogin:{latest-version}'
	}

The builds are also available via jitpack.io.

License

Licensed under the MIT license. See LICENSE.