com.groupon.sthaleeya.osm.PickFriendsActivity.java Source code

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Here is the source code for com.groupon.sthaleeya.osm.PickFriendsActivity.java

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/**
 * Copyright 2012 Facebook
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.groupon.sthaleeya.osm;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;

import com.facebook.FacebookException;
import com.facebook.model.GraphUser;
import com.facebook.widget.FriendPickerFragment;
import com.facebook.widget.PickerFragment;
import com.facebook.widget.PickerFragment.GraphObjectFilter;
import com.groupon.sthaleeya.Constants;
import com.groupon.sthaleeya.R;

// This class provides an example of an Activity that uses FriendPickerFragment to display a list of
// the user's friends. It takes a programmatic approach to creating the FriendPickerFragment with the
// desired parameters -- see PickPlaceActivity in the PlacePickerSample project for an example of an
// Activity creating a fragment (in this case a PlacePickerFragment) via XML layout rather than
// programmatically.
public class PickFriendsActivity extends FragmentActivity {
    FriendPickerFragment friendPickerFragment;
    Map<Long, Boolean> friendsMap = null;

    // A helper to simplify life for callers who want to populate a Bundle with the necessary
    // parameters. A more sophisticated Activity might define its own set of parameters; our needs
    // are simple, so we just populate what we want to pass to the FriendPickerFragment.
    public static void populateParameters(Intent intent, String userId, boolean multiSelect, boolean showTitleBar) {
        intent.putExtra(FriendPickerFragment.USER_ID_BUNDLE_KEY, userId);
        intent.putExtra(FriendPickerFragment.MULTI_SELECT_BUNDLE_KEY, multiSelect);
        intent.putExtra(FriendPickerFragment.SHOW_TITLE_BAR_BUNDLE_KEY, showTitleBar);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pick_friends);

        FragmentManager fm = getSupportFragmentManager();

        Bundle extras = getIntent().getExtras();
        if (extras != null && extras.containsKey(Constants.FRIENDS_ID_KEY)) {
            long[] friends_ids = extras.getLongArray(Constants.FRIENDS_ID_KEY);
            if (friends_ids != null) {
                friendsMap = new HashMap<Long, Boolean>();
                for (int i = 0; i < friends_ids.length; i++) {
                    friendsMap.put(friends_ids[i], true);
                }
            }
        }
        if (savedInstanceState == null) {
            // First time through, we create our fragment programmatically.
            final Bundle args = getIntent().getExtras();
            friendPickerFragment = new FriendPickerFragment(args);
            fm.beginTransaction().add(R.id.friend_picker_fragment, friendPickerFragment).commit();
        } else {
            // Subsequent times, our fragment is recreated by the framework and already has saved and
            // restored its state, so we don't need to specify args again. (In fact, this might be
            // incorrect if the fragment was modified programmatically since it was created.)
            friendPickerFragment = (FriendPickerFragment) fm.findFragmentById(R.id.friend_picker_fragment);
        }

        friendPickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() {
            @Override
            public void onError(PickerFragment<?> fragment, FacebookException error) {
                PickFriendsActivity.this.onError(error);
            }
        });

        friendPickerFragment.setOnDoneButtonClickedListener(new PickerFragment.OnDoneButtonClickedListener() {
            @Override
            public void onDoneButtonClicked(PickerFragment<?> fragment) {
                List<GraphUser> friends = friendPickerFragment.getSelection();
                String[] friends_ids = new String[friends.size()];
                for (int i = 0; i < friends.size(); i++) {
                    friends_ids[i] = friends.get(i).getId();
                }
                Intent intent = new Intent();
                intent.putExtra(Constants.FRIENDS_ID_KEY, friends_ids);
                setResult(RESULT_OK, intent);
                finish();
            }
        });
        friendPickerFragment.setFilter(new GraphObjectFilter<GraphUser>() {

            @Override
            public boolean includeItem(GraphUser graphObject) {
                if ((friendsMap != null) && friendsMap.containsKey(Long.parseLong(graphObject.getId())))
                    return false;
                return true;
            }
        });
    }

    private void onError(Exception error) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Error").setMessage(error.getMessage()).setPositiveButton("OK", null);
        builder.show();
    }

    @Override
    protected void onStart() {
        super.onStart();
        try {
            // Load data, unless a query has already taken place.
            friendPickerFragment.loadData(false);
        } catch (Exception ex) {
            onError(ex);
        }
    }
}