Facebook Integration with Android App

Hi Guys!

Today I going to share about the Facebook Integration with Android App.
The Facebook SDK for Android is the easiest way to integrate your Android app with Facebook's platform. The SDK provides support for Login with Facebook authentication, reading and writing to Facebook APIs and support for UI elements such as pickers and dialogs.

What I am going to implement watch in video.

The First thing is Download and extract the SDK ZIP file. The resulting folder, facebook-android-sdk-3.0.2, contains the SDK itself. We need to add this sdk library with our new android app project.

Now the second thing is need to get the SHA1 (Hash Key). For this we need to download the openssl and install in our system and configure with the system environment variable. Here is the link to download the setup OpenSsl. 
And set the path like that C:\Program Files (x86)\GnuWin32\bin (this is default directory to install in your system).
In the next step we have to create a folder inside the C drive name "Android" and copy the debug.keystore (default directory in my system is "C:\Users\sunil\.android") and paste inside thie Android folder.

Now the time is to generate the sha1 key by using the keystore file so use this command
C:\>keytool -exportcert -alias androiddebugkey -keystore "C:\Android\debug.keystore" | openssl sha1 -binary | openssl base64

 Once run this command then it asking about password then give password "android". Then it will generate the app id.

Now need to use this app id with your Facebook account. So logged your Facebook Account and click on developer tab and click on Apps tab.

 
You need to registered as a developer and save your SHA1 key here.

In the next step we need to create the new app then go to dashboard Apps tab and create new app.

After that it show the app id and secret app id

So you can use this APP ID  in your android project.

Lets create the the android project name "First Android" and add the facebook sdk as a library.

Lets start the coding now.

activity_main.xml

MainActivity.java

package com.sunil;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.facebook.android.AsyncFacebookRunner;
import com.facebook.android.AsyncFacebookRunner.RequestListener;
import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;

public class MainActivity extends Activity {

 // Your Facebook APP ID
 private static String APP_ID = "Your APP_ID"; // Replace with your App ID

 // Instance of Facebook Class
 private Facebook facebook = new Facebook(APP_ID);
 private AsyncFacebookRunner mAsyncRunner;
 String FILENAME = "AndroidSSO_data";
 private SharedPreferences mPrefs;

 // Buttons
 Button btnFbLogin;
 Button btnFbGetProfile;
 Button btnPostToWall;
 Button btnShowAccessTokens;

 @SuppressWarnings("deprecation")
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  btnFbLogin = (Button) findViewById(R.id.btn_fblogin);
  btnFbGetProfile = (Button) findViewById(R.id.btn_get_profile);
  btnPostToWall = (Button) findViewById(R.id.btn_fb_post_to_wall);
  btnShowAccessTokens = (Button) findViewById(R.id.btn_show_access_tokens);
  mAsyncRunner = new AsyncFacebookRunner(facebook);

  /**
   * Login button Click event
   * */
  btnFbLogin.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    Log.d("Image Button", "button Clicked");
    loginToFacebook();
   }
  });

  /**
   * Getting facebook Profile info
   * */
  btnFbGetProfile.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    getProfileInformation();
   }
  });

  /**
   * Posting to Facebook Wall
   * */
  btnPostToWall.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    postToWall();
   }
  });

  /**
   * Showing Access Tokens
   * */
  btnShowAccessTokens.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    showAccessTokens();
   }
  });

 }

 /**
  * Function to login into facebook
  * */
 @SuppressWarnings("deprecation")
 public void loginToFacebook() {

  mPrefs = getPreferences(MODE_PRIVATE);
  String access_token = mPrefs.getString("access_token", null);
  long expires = mPrefs.getLong("access_expires", 0);

  if (access_token != null) {
   facebook.setAccessToken(access_token);
   
   btnFbLogin.setVisibility(View.INVISIBLE);
   
   // Making get profile button visible
   btnFbGetProfile.setVisibility(View.VISIBLE);

   // Making post to wall visible
   btnPostToWall.setVisibility(View.VISIBLE);

   // Making show access tokens button visible
   btnShowAccessTokens.setVisibility(View.VISIBLE);

   Log.d("FB Sessions", "" + facebook.isSessionValid());
  }

  if (expires != 0) {
   facebook.setAccessExpires(expires);
  }

  if (!facebook.isSessionValid()) {
   facebook.authorize(this,
     new String[] { "email", "publish_stream" },
     new DialogListener() {

      @Override
      public void onCancel() {
       // Function to handle cancel event
      }

      @Override
      public void onComplete(Bundle values) {
       // Function to handle complete event
       // Edit Preferences and update facebook acess_token
       SharedPreferences.Editor editor = mPrefs.edit();
       editor.putString("access_token",
         facebook.getAccessToken());
       editor.putLong("access_expires",
         facebook.getAccessExpires());
       editor.commit();

       // Making Login button invisible
       btnFbLogin.setVisibility(View.INVISIBLE);

       // Making logout Button visible
       btnFbGetProfile.setVisibility(View.VISIBLE);

       // Making post to wall visible
       btnPostToWall.setVisibility(View.VISIBLE);

       // Making show access tokens button visible
       btnShowAccessTokens.setVisibility(View.VISIBLE);
      }

      @Override
      public void onError(DialogError error) {
       // Function to handle error

      }

      @Override
      public void onFacebookError(FacebookError fberror) {
       // Function to handle Facebook errors

      }

     });
  }
 }

 @Override
 public void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  facebook.authorizeCallback(requestCode, resultCode, data);
 }


 /**
  * Get Profile information by making request to Facebook Graph API
  * */
 @SuppressWarnings("deprecation")
 public void getProfileInformation() {
  mAsyncRunner.request("me", new RequestListener() {
   @Override
   public void onComplete(String response, Object state) {
    Log.d("Profile", response);
    String json = response;
    try {
     // Facebook Profile JSON data
     JSONObject profile = new JSONObject(json);
     
     // getting name of the user
     final String name = profile.getString("name");
     
     // getting email of the user
     final String email = profile.getString("email");
     
     runOnUiThread(new Runnable() {

      @Override
      public void run() {
       Toast.makeText(getApplicationContext(), "Name: " + name + "\nEmail: " + email, Toast.LENGTH_LONG).show();
      }

     });

     
    } catch (JSONException e) {
     e.printStackTrace();
    }
   }

   @Override
   public void onIOException(IOException e, Object state) {
   }

   @Override
   public void onFileNotFoundException(FileNotFoundException e,
     Object state) {
   }

   @Override
   public void onMalformedURLException(MalformedURLException e,
     Object state) {
   }

   @Override
   public void onFacebookError(FacebookError e, Object state) {
   }
  });
 }

 /**
  * Function to post to facebook wall
  * */
 @SuppressWarnings("deprecation")
 public void postToWall() {
  // post on user's wall.
  facebook.dialog(this, "feed", new DialogListener() {

   @Override
   public void onFacebookError(FacebookError e) {
   }

   @Override
   public void onError(DialogError e) {
   }

   @Override
   public void onComplete(Bundle values) {
   }

   @Override
   public void onCancel() {
   }
  });

 }

 /**
  * Function to show Access Tokens
  * */
 public void showAccessTokens() {
  String access_token = facebook.getAccessToken();

  Toast.makeText(getApplicationContext(),
    "Access Token: " + access_token, Toast.LENGTH_LONG).show();
 }
 
 /**
  * Function to Logout user from Facebook
  * */
 @SuppressWarnings("deprecation")
 public void logoutFromFacebook() {
  mAsyncRunner.logout(this, new RequestListener() {
   @Override
   public void onComplete(String response, Object state) {
    Log.d("Logout from Facebook", response);
    if (Boolean.parseBoolean(response) == true) {
     runOnUiThread(new Runnable() {

      @Override
      public void run() {
       // make Login button visible
       btnFbLogin.setVisibility(View.VISIBLE);

       // making all remaining buttons invisible
       btnFbGetProfile.setVisibility(View.INVISIBLE);
       btnPostToWall.setVisibility(View.INVISIBLE);
       btnShowAccessTokens.setVisibility(View.INVISIBLE);
      }

     });

    }
   }

   @Override
   public void onIOException(IOException e, Object state) {
   }

   @Override
   public void onFileNotFoundException(FileNotFoundException e,
     Object state) {
   }

   @Override
   public void onMalformedURLException(MalformedURLException e,
     Object state) {
   }

   @Override
   public void onFacebookError(FacebookError e, Object state) {
   }
  });
 }

}

You can download the source code First Android.