Android Facebook SDK integration with user details in Android Studio

Learn easy steps to login with Facebook Android SDK and save user details. Mostly apps use Facebook login feature to get user info without giving a long form to fill up data and save them. Here is simple steps:-

Facebook Steps

Go to Facebook developer console:- Facebook Developer Console and create an app, enter all description, images, banner in App Details and put it into live mode in Status & Review . After that go to Dashboard and click on Getting Started button and select Android and than follow the given steps there. Download Facebook Android SDK, generate hash, put all info there. Some basic questions:-

Question:- How to generate hash?
Answer:- Download openssl.exe from official site or from code.google.com (I downloaded from official site)and unzip it. Open command prompt and type below command to generate hash:

keytool -exportcert -alias mykey -keystore %HOMEPATH%\.android\debug.keystore | "C:\openssl\openssl.exe" sha1 -binary | "C:\openssl\openssl.exe" base64

cmd will ask password than generate hash and in my case, openssl.exe was in C:\openssl\ directory so change it accordingly. Copy your app id and now you have all done from Facebook side.

Project Steps

Extract downloaded Facebook SDK file and you will find a "facebook" project inside the whole package. Now open android studio and import it as a module(import as a module only "facbook" project not complete projects).

Open facebook project module and define a string "facebook_app_id" in string.xml file.

<string name="facebook_app_id">625178694184501</string>

change it with your app id. now change manifest file of Facebook project:-

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.facebook">

    <uses-sdk android:minSdkVersion="9"/>

    <uses-permission android:name="android.permission.INTERNET"/>

    <application>
        <activity android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:label="@string/facebook_app_name" />

        <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>

    </application>
</manifest>

You have done from facebook project module and now move to your main project. Go to file -> project structure -> dependency -> add facebook.

Now open your layout file and add a button for facbook login and assign id name "bt_facebook" than use below code in your activity for Facebook login and user details:-

package com.exampe.facebooklogin; //your project name

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.Profile;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;

import java.util.Arrays;

public class FacebookLogin extends ActionBarActivity {

    //For facebook
    private CallbackManager callbackManager;

    private Button facebook_button;
    ProgressDialog progress;
    private String facebook_id,f_name, m_name, l_name, gender, profile_image, full_name, email_id;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try {
            getSupportActionBar().hide();
        }catch (NullPointerException e){

        }
        setContentView(R.layout.activity_facebook_login);

        facebook_button=(Button)findViewById(R.id.bt_facebook);

        progress=new ProgressDialog(FacebookLogin.this);
        progress.setMessage(getResources().getString(R.string.please_wait_facebooklogin));
        progress.setIndeterminate(false);
        progress.setCancelable(false);

        facebook_id=f_name= m_name= l_name= gender= profile_image= full_name= email_id="";

        //for facebook
        FacebookSdk.sdkInitialize(getApplicationContext());
        callbackManager = CallbackManager.Factory.create();

        //register callback object for facebook result
        LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                progress.show();
                Profile profile = Profile.getCurrentProfile();
                if (profile != null) {
                    facebook_id=profile.getId();
                    f_name=profile.getFirstName();
                    m_name=profile.getMiddleName();
                    l_name=profile.getLastName();
                    full_name=profile.getName();
                    profile_image=profile.getProfilePictureUri(400, 400).toString();
                }
                //Toast.makeText(FacebookLogin.this,"Wait...",Toast.LENGTH_SHORT).show();
                GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(),
                        new GraphRequest.GraphJSONObjectCallback() {
                            @Override
                            public void onCompleted(JSONObject object, GraphResponse response) {
                                try {
                                    email_id=object.getString("email");
                                    gender=object.getString("gender");

                                    String profile_name=object.getString("name");

                                    long fb_id=object.getLong("id"); //use this for logout
         //Start new activity or use this info in your project.
                                    Intent i=new Intent(FacebookLogin.this, LoginSuccess.class);
                                    i.putExtra("type","facebook");
                                    i.putExtra("facebook_id",facebook_id);
                                    i.putExtra("f_name",f_name);
                                    i.putExtra("m_name",m_name);
                                    i.putExtra("l_name",l_name);
                                    i.putExtra("full_name",full_name);
                                    i.putExtra("profile_image",profile_image);
                                    i.putExtra("email_id",email_id);
                                    i.putExtra("gender",gender);

                                    progress.dismiss();
                                    startActivity(i);
                                    finish();
                                } catch (JSONException e) {
                                    // TODO Auto-generated catch block
                                    //  e.printStackTrace();
                                }

                            }

                        });

                request.executeAsync();
            }

            @Override
            public void onCancel() {
                Toast.makeText(FacebookLogin.this,getResources().getString(R.string.login_canceled_facebooklogin),Toast.LENGTH_SHORT).show();
                progress.dismiss();
            }

            @Override
            public void onError(FacebookException error) {
                Toast.makeText(FacebookLogin.this,getResources().getString(R.string.login_failed_facebooklogin),Toast.LENGTH_SHORT).show();
                progress.dismiss();
            }
        });

        //facebook button click
        facebook_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LoginManager.getInstance().logInWithReadPermissions(FacebookLogin.this, Arrays.asList("public_profile", "user_friends", "email"));
            }
        });
    }

    //for facebook callback result.
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }

}

To logout from Facebook:-

private void logoutFromFacebook(){
        try {
            if (AccessToken.getCurrentAccessToken() == null) {
                return; // already logged out
            }
            long fb_id=sp.getFacebookId(); //get fb id from sharedprefrences
            GraphRequest graphRequest=new GraphRequest(AccessToken.getCurrentAccessToken(), "/ "+fb_id+"/permissions/", null,
                    HttpMethod.DELETE, new GraphRequest.Callback() {
                        @Override
                        public void onCompleted(GraphResponse graphResponse) {
                            LoginManager.getInstance().logOut();
                        }
            });

            graphRequest.executeAsync();
        }catch(Exception ex) {
            ex.printStackTrace();
        }
    }

To get current Access Token:-

AccessToken.getCurrentAccessToken().getToken();

In this post, I used custom button for login, you all can use official Facebook button. Don't forget to share this post. If you have any question regarding this post than feel free to comment.

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