ตัวอย่างการใช้ Facebook SDK ล็อคอิน สำหรับ Android Application @see http://devsharing.com/2013/android/facebook-sdk-for-android-example/

A1.xml

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

A2.xml

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

A3.xml

<activity android:name="com.facebook.LoginActivity"/>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.devsharing.demo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.devsharing.demo.LoginActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

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

        <activity android:name="com.facebook.LoginActivity" />
    </application>

</manifest>

L1.java

Session.openActiveSession(this, true, new Session.StatusCallback() {
     
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        // TODO Auto-generated method stub
    }
});

L2.java

Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
     
    @Override
    public void onCompleted(GraphUser user, Response response) {
        // TODO Auto-generated method stub 
    }
});

L3.java

if (user != null) {
    TextView welcome = (TextView) findViewById(R.id.hello);
    welcome.setText(welcome.getText() + " " + user.getName() + "!");
}

L4.java

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}

login.xml

<TextView
    android:id="@+id/hello"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world" 
    android:textSize="20sp"/>

LoginActivity.java

package com.devsharing.demo;
 
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;
 
import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.model.GraphUser;
 
public class LoginActivity extends Activity {
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login);
     
    Session.openActiveSession(this, true, new Session.StatusCallback() {
         
      @Override
      public void call(Session session, SessionState state, Exception exception) {
 
        if (session.isOpened()) {
          Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
               
            @Override
            public void onCompleted(GraphUser user, Response response) {
                 
              if (user != null) {
                  TextView welcome = (TextView) findViewById(R.id.hello);
                  welcome.setText(welcome.getText() + " " + user.getName() + "!");
              }
            }
          });
             
        }
      }
    });
  }
 
 
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.login, menu);
    return true;
  }
   
  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
  }
   
}

string.xml

<string name="hello_world">สวัสดีครับ คุณ </string>

string2.xml

<string name="app_id">123456789123</string>