CurrentPlaceDialogFragment.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.places.fragments;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.example.places.PlacesGraphSDKHelper;
import com.example.places.R;
import com.example.places.adapters.PlaceListAdapter;
import com.example.places.model.CurrentPlaceResult;
import com.example.places.model.Place;
import com.facebook.GraphResponse;
import com.facebook.places.PlaceManager;

/**
 * This dialog fragment illustrates how to:
 * <ul>
 *   <li>Fetch a collection of current place candidates where the user might be located.</li>
 *   <li>Display a list of current place candidates.</li>
 *   <li>Provide feedback about the current place estimate.</li>
 * </ul>
 */
public class CurrentPlaceDialogFragment extends DialogFragment implements
        PlaceListAdapter.Listener {

    public static final String EXTRA_CURRENT_PLACE = "current_place";

    private RecyclerView recyclerView;
    private View loadingView;
    private CurrentPlaceResult currentPlaceResult;
    private CurrentPlaceRequestListener currentPlaceRequestListener
            = new CurrentPlaceRequestListener();

    public static CurrentPlaceDialogFragment newInstance() {
        return new CurrentPlaceDialogFragment();
    }

    @Override
    public void onDetach() {
        super.onDetach();
        currentPlaceRequestListener = null;
    }

    public View onCreateView(
            LayoutInflater inflater,
            @Nullable ViewGroup container,
            Bundle savedInstanceState) {
        getDialog().setTitle(getString(R.string.current_place));
        return inflater.inflate(R.layout.current_place_fragment, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        recyclerView = (RecyclerView) view.findViewById(R.id.current_place_recyclerview);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        loadingView = view.findViewById(R.id.current_place_loading_container);

        getCurrentPlace();
    }

    private void getCurrentPlace() {
        PlacesGraphSDKHelper.getCurrentPlace(currentPlaceRequestListener);
    }

    @Override
    public void onPlaceSelected(Place place) {

        // Provides feedback to the Places Graph once the user confirms presence at
        // a place. This feedback helps Facebook improve the accuracy of current place estimates.
        PlacesGraphSDKHelper.provideCurrentPlaceFeedback(
                currentPlaceResult,
                place,
                true);

        Intent data = new Intent();
        data.putExtra(EXTRA_CURRENT_PLACE, place);

        getTargetFragment().onActivityResult(
                getTargetRequestCode(),
                Activity.RESULT_OK,
                data);

        dismiss();
    }

    private void refreshCurrentPlaceList(CurrentPlaceResult result) {
        currentPlaceResult = result;

        PlaceListAdapter adapter = new PlaceListAdapter(
                R.layout.current_place_list_item,
                result.getPlaces(),
                this);

        recyclerView.setAdapter(adapter);
        recyclerView.setVisibility(View.VISIBLE);
        loadingView.setVisibility(View.GONE);
    }

    private class CurrentPlaceRequestListener
            implements PlacesGraphSDKHelper.CurrentPlaceRequestListener {

        @Override
        public void onCurrentPlaceResult(
                @Nullable final CurrentPlaceResult result,
                final GraphResponse response) {

            if (isAdded()) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        if (result == null) {
                            Toast.makeText(
                                    getActivity(),
                                    R.string.error,
                                    Toast.LENGTH_SHORT).show();
                            dismiss();
                        } else {
                            refreshCurrentPlaceList(result);
                        }
                    }
                });
            }
        }

        @Override
        public void onLocationError(PlaceManager.LocationError error) {
            if (isAdded()) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(
                                getActivity(),
                                R.string.location_error_unknown,
                                Toast.LENGTH_SHORT).show();
                        dismiss();
                    }
                });
            }
        }
    }
}