Facebook Login with Facebook 4.01 SDK Released recently

There are many changes in new sdk release by facebook for app integration.New Facebook sdk has simplified many things from older versions.

So what we have to do to integrate facebook in our app with new sdk follows :

Download the facebook sdk from this link :

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

Include latest Facebook sdk in your workspace.Some libraries you may have to include in order to make sdk run.that will be ;

1. android-support-v4.jar

2. bolts-android-1.1.2.jar (this can be found from older sdk libs folder).

clean the imported sdk and all set now.

now create your android project and include facebook sdk in your project and finally your project structure will go like this :

now from code side .

1. MainActivity.java

public class MainActivity extends ActionBarActivity {
Button mFacebookloginbtn;
private CallbackManager callbackManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initiViews();
}
private void initiViews() {
mFacebookloginbtn=(Button)findViewById(R.id.Facebookloginbtn);

FacebookSdk.sdkInitialize(MainActivity.this.getApplicationContext());
callbackManager = CallbackManager.Factory.create();
LoginManager.getInstance().registerCallback(callbackManager,new FacebookCallback() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.e("loginresult", loginResult.toString());
if(Profile.getCurrentProfile()!=null){
Log.e("Pofile",Profile.getCurrentProfile().getName()+Profile.getCurrentProfile().getFirstName()+Profile.getCurrentProfile().getLastName()+Profile.getCurrentProfile().getId()); 
}else{
Profile.fetchProfileForCurrentAccessToken();
Log.e("Pofile",Profile.getCurrentProfile().getName()+Profile.getCurrentProfile().getFirstName()+Profile.getCurrentProfile().getLastName()+Profile.getCurrentProfile().getId());
}
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException exception) {
}
});
mFacebookloginbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
LoginManager.getInstance().logInWithReadPermissions(MainActivity.this,Arrays.asList("public_profile", "user_friends"));
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}

1. activity_main.xml

Output Screen :

Things to be noticed here are :

1.LoginManager.getInstance().logInWithReadPermissions(MainActivity.this,

Arrays.asList("public_profile", "user_friends")); 

: this lone will make us start with login in facebook.

Define your app permissions here read,write,publish etc.

2. FacebookSdk.sdkInitialize(MainActivity.this.getApplicationContext());

: This line will initialize our facebook sdk and Initialize our

sdk for our app.

3. You have to implement a callback named LoginManager in

order to get the login response here . Which goes like this :

LoginManager.getInstance().registerCallback(callbackManager,new

FacebookCallback<LoginResult>() {

@Override

public void onSuccess(LoginResult

loginResult) {

}

}

@Override 

public void onCancel() {

}

@Override 

public void onError(FacebookException

exception) {

}

});

Here you have to pass a CallbackManager interface which can be

initialize like this : 

private CallbackManager callbackManager;

callbackManager =CallbackManager.Factory.create();

4. Now if we want some info regarding user then we can get like

this on login success callback :

if(Profile.getCurrentProfile()!=null){

Log.e("Profile<><><>",

Profile.getCurrentProfile().getName()+Profile.getCurrentProfile().getFirstName()+Profile.getCurrentProfile().getLastName()+Profile.getCurrentProfile().getId());

}else{

Profile.fetchProfileForCurrentAccessToken();

Log.e("Profile<><><>",

Profile.getCurrentProfile().getName()+Profile.getCurrentProfile().getFirstName()+Profile.getCurrentProfile().getLastName()+Profile.getCurrentProfile().getId());

}

Here we have to use Profile class define in facebook sdk to fetch the

information.

5. Resultcode inside onActivityResult after login success will

be : 64206

Which can be used if we've to handle multiple conditions inside

onActivityResult 

Cheers!!!