Generating App Signature for Facebook Settings --2

Now our project setup is done. We can start coding our facebook application.

3. Open your AndroidManifest.xml file add network connect permission in order to connect to internet.

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

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.facebook.androidhive"     android:versionCode="1"     android:versionName="1.0" >       <uses-sdk android:minSdkVersion="8" />       <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name" >         <activity             android:label="@string/app_name"             android:name=".AndroidFacebookConnectActivity" >             <intent-filter >                 <action android:name="android.intent.action.MAIN" />                   <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     </application>       <!-- Connect to Internet Permissions -->     <uses-permission android:name="android.permission.INTERNET"/>   </manifest>

4. Open Your Main Activity Class and initialize all the variables needed.

public class AndroidFacebookConnectActivity extends Activity {       // Your Facebook APP ID     private static String APP_ID = "308180782571605"; // Replace your App ID here       // Instance of Facebook Class     private Facebook facebook;     private AsyncFacebookRunner mAsyncRunner;     String FILENAME = "AndroidSSO_data";     private SharedPreferences mPrefs;       @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);           facebook = new Facebook(APP_ID);         mAsyncRunner = new AsyncFacebookRunner(facebook);

5. I created a simple interface which contains button to login, post to wall, show access tokens and logout for testing purpose.

Login to Facebook Account

I used a button to login into facebook account. In your activity write a click event for Login button click. Inside click event declare a function named loginToFacebook();

Login button click event

btnFbLogin.setOnClickListener(new View.OnClickListener() {     @Override     public void onClick(View v) {             loginToFacebook();         } });

and function body for loginToFacebook() function is:

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);     }       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();                     }                       @Override                     public void onError(DialogError error) {                         // Function to handle error                       }                       @Override                     public void onFacebookError(FacebookError fberror) {                         // Function to handle Facebook errors                       }                   });     } }

Posting Message to Facebook Wall

write a click event for post to wall button and inside click event write a function namedpostToWall()

btnPostToWall.setOnClickListener(new View.OnClickListener() {     @Override     public void onClick(View v) {         postToWall();     } });

and function body for postToWall() function is:

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() {         }     });   }