Logout.java

package mx.ambmultimedia.brillamexico.activities;

import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.text.Html;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;

import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.widget.LoginButton;
import com.squareup.picasso.Picasso;

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

import java.util.Arrays;

import de.hdodenhof.circleimageview.CircleImageView;
import mx.ambmultimedia.brillamexico.R;
import mx.ambmultimedia.brillamexico.utils.Config;


public class Logout extends ActionBarActivity {
    Context ctx;
    Config config;

    private UiLifecycleHelper uiHelper;
    private Session.StatusCallback callback = new Session.StatusCallback() {
        @Override
        public void call(Session session, SessionState sessionState, Exception e) {
            onSessionChange (session, sessionState, e);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_logout);
        ctx = this;
        config = new Config(ctx);

        Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        TextView deleteAcount = (TextView) findViewById(R.id.deleteAcount);
        deleteAcount.setText(Html.fromHtml( deleteAcount.getText().toString() ));

        deleteAcount.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Logout.this, EraseAcount.class);
                startActivity(intent);
            }
        });

        BuildProfile();

        /***
         * Creando Login de facebook
         */

        uiHelper = new UiLifecycleHelper(this, callback);
        uiHelper.onCreate(savedInstanceState);

        LoginButton loginBtn = (LoginButton) findViewById(R.id.authButton);
        loginBtn.setPublishPermissions(Arrays.asList("email", "public_profile", "publish_actions"));
    }

    public void BuildProfile () {
        String fbID = config.get("fbID", "0");
        String _user = config.get("user", "null");

        final TextView DrawerUserName = (TextView) findViewById(R.id.l_userName);

        try {
            JSONObject user = new JSONObject(_user);
            DrawerUserName.setText(user.getString("name"));
        } catch (JSONException e) { }

        CircleImageView ImgDrawerAvatar = (CircleImageView) findViewById(R.id.l_usersAvatar);
        String _avatarUrl = getString(R.string.fb_avatar_link);
        String miniAvatarUrl = _avatarUrl.replaceAll("__fbid__", fbID);
        Picasso.with(ctx)
                .load(miniAvatarUrl)
                .placeholder(R.drawable.com_facebook_profile_picture_blank_square)
                .into(ImgDrawerAvatar);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onResume() {
        super.onResume();

        Session session = Session.getActiveSession();
        if (session != null && (session.isClosed() || session.isOpened())) {
            onSessionChange(session, session.getState(), null);
        }

        uiHelper.onResume();
    }

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

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

    @Override
    protected void onSaveInstanceState(Bundle bundle) {
        super.onSaveInstanceState(bundle);
        uiHelper.onSaveInstanceState(bundle);
    }

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

    // Facebook Methods

    public void onSessionChange (Session session, SessionState sessionState, Exception e) {
        if (session != null && session.isOpened()) {
            // Está logueado
        } else {
            config.clear();
            Intent intent = new Intent(Logout.this, LoginStep1.class);
            startActivity(intent);
        }
    }
}