Android Login with Facebook Util

Pre-requisite###

Official Document: https://developers.facebook.com/docs/android/

Official Tutorial: https://developers.facebook.com/docs/android/login-with-facebook/v2.2

Previous Document: http://www.kpbird.com/2013/03/android-login-using-facebook-sdk-30.html

1. Facebook Android SDK 3.0 -Download
2. Facebook API Key from Facebook Application - Detail
3. Hash Key of your debug certificate - Detail

Usage

Step 1: Import "FacebookLoginUtils.java" class in your package

Step 2: Implement callback listener

public class MyActivity extends Activity implements FacebookLoginUtils.FacebookLoginStatus 

Step 3: Declare callback method

@Override
public void OnSuccessFacebookLogin(Bundle profile) {
    Log.i(TAG,profile.getString(FacebookLoginUtils.USERID));
    Log.i(TAG,profile.getString(FacebookLoginUtils.EMAIL));
    Log.i(TAG,profile.getString(FacebookLoginUtils.NAME));
    Log.i(TAG,profile.getString(FacebookLoginUtils.FIRST_NAME));
    Log.i(TAG,profile.getString(FacebookLoginUtils.LAST_NAME));

}

Step 4: Declare object of FacebookLoginUtils.java

private FacebookLoginUtils fLogin;

Step 5: Initialize object in onCreate method

    fLogin = new FacebookLoginUtils(this, R.id.activity_login_fb);
    fLogin.setLoginStatus(this);
    fLogin.setEnable(true);

Step 6: Declare few supporting methods

protected void onResume() {
    super.onResume();
    fLogin.onResume();
};

@Override
protected void onPause() {
    super.onPause();
    fLogin.onPause();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    fLogin.onDestroy();
}


@Override
protected void onActivityResult(int requestCode, int responseCode,Intent intent) {
    fLogin.onActivityResult(requestCode, responseCode, intent);
}

FAQ###

Q: What is the problem of above approach ?

A: You activity has a lot of scattered code for Facebook login, It will be more complex and unmanageable when you will have another social network login like Facebook and Twitter.

Q: How I will receive a response for login success?

A: You need to implement interface "FacebookLoginStatus", on successful login you will receive callback "OnSuccessFacebookLogin"

Q: What will be received on login success ?

A: You will have Name, Email , First Name, Last Name, User Id.

Q: Do I need to handle login failure / error ?

A: No, FacebookLoginUtils.java will handle login failure, error and display appropriate message on screen.