MainActivity.java

package com.gmsetiawan.droidclass;

import java.util.Arrays;

import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.facebook.*;
import com.facebook.model.*; 
import com.facebook.widget.LoginButton;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
    
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

    	private static final String TAG = "PlaceholderFragment";
    	private UiLifecycleHelper uiHelper;
    	
        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            
            /*Session.openActiveSession(getActivity(), true, new Session.StatusCallback() {
				
				@Override
				public void call(Session session, SessionState state, Exception exception) {
					// TODO Auto-generated method stub
					if (session.isOpened()) {
						Request.newMeRequest(session, new Request.GraphUserCallback() {
							
							@Override
							public void onCompleted( GraphUser user, Response response) {
								// TODO Auto-generated method stub
								if (user != null) {
									TextView welcome = (TextView) getView().findViewById(R.id.welcome);
									welcome.setText("Hello " + user.getName() + " " + user.getId() + "!");
								}
							}
						}).executeAsync();
					}
				}
			});*/
            
            LoginButton authButton = (LoginButton) rootView.findViewById(R.id.authButton);
            authButton.setFragment(this);
            authButton.setReadPermissions(Arrays.asList("user_likes", "user_status"));
            
            Session session = Session.getActiveSession();
            if (session != null &&
                   (session.isOpened() || session.isClosed()) ) {
                onSessionStateChange(session, session.getState(), null);
            }

            uiHelper.onResume();
            
            return rootView;
        }
        
        private void onSessionStateChange(Session session, SessionState state, Exception exception) {
            if (state.isOpened()) {
                Log.i(TAG, "Logged in...");
                Request.newMeRequest(session, new Request.GraphUserCallback() {
					
					@Override
					public void onCompleted( GraphUser user, Response response) {
						// TODO Auto-generated method stub
						if (user != null) {
							TextView welcome = (TextView) getView().findViewById(R.id.welcome);
							welcome.setText("Hello " + user.getName() + " " + user.getId() + "!");
						} 
					}
				}).executeAsync();
            } else if (state.isClosed()) {
                Log.i(TAG, "Logged out...");
                TextView welcome = (TextView) getView().findViewById(R.id.welcome);
				welcome.setText("Please Login");
            }
        }
        
        private Session.StatusCallback callback = new Session.StatusCallback() {
            @Override
            public void call(Session session, SessionState state, Exception exception) {
                onSessionStateChange(session, state, exception);
            }
        };

		@Override
		public void onCreate(Bundle savedInstanceState) {
			// TODO Auto-generated method stub
			super.onCreate(savedInstanceState);
			uiHelper = new UiLifecycleHelper(getActivity(), callback);
		    uiHelper.onCreate(savedInstanceState);
		}
        
		@Override
		public void onResume() {
		    super.onResume();
		    uiHelper.onResume();
		}

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

		@Override
		public void onPause() {
		    super.onPause();
		    uiHelper.onPause();
		}

		@Override
		public void onDestroy() {
		    super.onDestroy();
		    uiHelper.onDestroy();
		}

		@Override
		public void onSaveInstanceState(Bundle outState) {
		    super.onSaveInstanceState(outState);
		    uiHelper.onSaveInstanceState(outState);
		}
        
    }

}