ProfileFragment.java

/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
 * copy, modify, and distribute this software in source code or binary form for use
 * in connection with the web services and APIs provided by Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use of
 * this software is subject to the Facebook Developer Principles and Policies
 * [http://developers.facebook.com/policy/]. This copyright notice shall be
 * included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.example.switchuser;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.*;
import android.widget.TextView;

import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.Profile;
import com.facebook.ProfileTracker;
import com.facebook.login.widget.ProfilePictureView;

public class ProfileFragment extends Fragment {

    public static final String TAG = "ProfileFragment";

    private TextView userNameView;
    private ProfilePictureView profilePictureView;
    private OnOptionsItemSelectedListener onOptionsItemSelectedListener;

    private Profile pendingUpdateForUser;
    private CallbackManager callbackManager;
    private ProfileTracker profileTracker;
    private AccessTokenTracker accessTokenTracker;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
        callbackManager = CallbackManager.Factory.create();
        profileTracker = new ProfileTracker() {
            @Override
            protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) {
                setProfile(currentProfile);
            }
        };

        accessTokenTracker = new AccessTokenTracker() {
            @Override
            protected void onCurrentAccessTokenChanged(
                    AccessToken oldAccessToken,
                    AccessToken currentAccessToken) {
                // On AccessToken changes fetch the new profile which fires the event on
                // the ProfileTracker if the profile is different
                Profile.fetchProfileForCurrentAccessToken();
            }
        };

        // Ensure that our profile is up to date
        Profile.fetchProfileForCurrentAccessToken();
        setProfile(Profile.getCurrentProfile());
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        inflater.inflate(R.menu.options_profile, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        boolean handled = false;
        OnOptionsItemSelectedListener listener = onOptionsItemSelectedListener;
        if (listener != null) {
            handled = listener.onOptionsItemSelected(item);
        }

        if (!handled) {
            handled = super.onOptionsItemSelected(item);
        }

        return handled;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_profile, parent, false);

        userNameView = (TextView) v.findViewById(R.id.profileUserName);
        profilePictureView = (ProfilePictureView) v.findViewById(R.id.profilePic);

        if (pendingUpdateForUser != null) {
            setProfile(pendingUpdateForUser);
            pendingUpdateForUser = null;
        }

        return v;
    }

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

    @Override
    public void onDestroy() {
        super.onDestroy();
        profileTracker.stopTracking();
        accessTokenTracker.stopTracking();
    }

    public void setOnOptionsItemSelectedListener(OnOptionsItemSelectedListener listener) {
        this.onOptionsItemSelectedListener = listener;
    }

    private void setProfile(Profile profile) {
        if (userNameView == null || profilePictureView == null || !isAdded()) {
            // Fragment not yet added to the view. So let's store which user was intended
            // for display.
            pendingUpdateForUser = profile;
            return;
        }

        if (profile == null) {
            profilePictureView.setProfileId(null);
            userNameView.setText(R.string.greeting_no_user);
        } else {
            profilePictureView.setProfileId(profile.getId());
            userNameView.setText(String.format(getString(R.string.greeting_format),
                    profile.getName()));
        }
    }

    public interface OnOptionsItemSelectedListener {
        boolean onOptionsItemSelected(MenuItem item);
    }
}