fr.outadev.skinswitch.GalleryPageFragment.java Source code

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Here is the source code for fr.outadev.skinswitch.GalleryPageFragment.java

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/*
 * SkinSwitch - GalleryPageFragment
 * Copyright (C) 2014-2015  Baptiste Candellier
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package fr.outadev.skinswitch;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.ProgressBar;

import com.github.kevinsawicki.http.HttpRequest;
import com.nispok.snackbar.Snackbar;
import com.nispok.snackbar.listeners.ActionClickListener;

import java.util.ArrayList;
import java.util.List;

import fr.outadev.skinswitch.network.SkinManagerConnectionHandler;
import fr.outadev.skinswitch.network.SkinManagerConnectionHandler.EndPoint;

/**
 * Fragment containing a skin library tab.
 * Displays a list of skins downloaded from the API, depending on the requested end point.
 *
 * @author outadoc
 */
public class GalleryPageFragment extends Fragment {

    public static final String ARG_ENDPOINT = "EndPoint";
    public static final String ARG_SEARCH_QUERY = "SearchQuery";
    private static final int MAX_SKINS_LOAD_COUNT = 15;

    private EndPoint endPoint;
    private String searchQuery;
    private List<GallerySkin> skinsList;
    private GalleryListAdapter adapter;
    private SwipeRefreshLayout swipeRefreshLayout;

    private ProgressBar progressBar;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);

        Bundle args = getArguments();

        if (args == null) {
            endPoint = EndPoint.RANDOM_SKINS;
            searchQuery = ".";
        } else {
            endPoint = (EndPoint) args.get(ARG_ENDPOINT);
            searchQuery = args.getString(ARG_SEARCH_QUERY);
        }

        View view = inflater.inflate(R.layout.fragment_skin_gallery_list, container, false);

        progressBar = (ProgressBar) view.findViewById(R.id.progress_bar);
        swipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
        swipeRefreshLayout.setColorSchemeResources(R.color.loading_bar_one, R.color.loading_bar_two,
                R.color.loading_bar_one, R.color.loading_bar_two);
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {

            @Override
            public void onRefresh() {
                loadSkinsFromNetwork();
            }

        });

        ListView listView = (ListView) view.findViewById(R.id.skins_library_list);
        skinsList = new ArrayList<GallerySkin>();
        adapter = new GalleryListAdapter(getActivity(), android.R.layout.simple_list_item_1, skinsList);
        listView.setAdapter(adapter);

        listView.setOnScrollListener(
                new EndlessScrollListener(getResources().getInteger(R.integer.endless_scroll_visible_threshold)) {

                    @Override
                    public void onLoadMore(int page, int totalItemsCount) {
                        loadSkinsFromNetwork(true);
                    }

                });

        loadSkinsFromNetwork(false);
        return view;
    }

    private void loadSkinsFromNetwork() {
        loadSkinsFromNetwork(false);
    }

    /**
     * Downloads a list of skins from the API and displays them in the list.
     *
     * @param append determines whether the downloaded skins should be appended to the list or replace it.
     */
    private void loadSkinsFromNetwork(final boolean append) {
        (new AsyncTask<Void, Void, List<GallerySkin>>() {

            @Override
            protected void onPreExecute() {
                swipeRefreshLayout.setRefreshing(true);
            }

            @Override
            protected List<GallerySkin> doInBackground(Void... params) {
                SkinManagerConnectionHandler handler = new SkinManagerConnectionHandler(getActivity());

                try {
                    switch (endPoint) {
                    case LATEST_SKINS:
                        return handler.fetchLatestSkins(MAX_SKINS_LOAD_COUNT, skinsList.size());
                    case RANDOM_SKINS:
                        return handler.fetchRandomSkins(MAX_SKINS_LOAD_COUNT);
                    case SEARCH_SKINS:
                        return handler.fetchSkinByName(searchQuery, MAX_SKINS_LOAD_COUNT, skinsList.size());
                    case ALL_SKINS:
                        return handler.fetchAllSkins(MAX_SKINS_LOAD_COUNT, skinsList.size());
                    }
                } catch (HttpRequest.HttpRequestException e) {
                    e.printStackTrace();
                    return null;
                }

                return null;
            }

            @Override
            protected void onPostExecute(List<GallerySkin> result) {
                progressBar.setVisibility(View.GONE);
                swipeRefreshLayout.setRefreshing(false);

                if (result != null) {
                    if (!append) {
                        skinsList.clear();
                    }

                    skinsList.addAll(result);
                    adapter.notifyDataSetChanged();
                } else {
                    if (isAdded()) {
                        Snackbar.with(getActivity()).text(R.string.gallery_connection_error)
                                .actionLabel(R.string.error_retry).actionColorResource(R.color.colorAccent)
                                .actionListener(new ActionClickListener() {

                                    @Override
                                    public void onActionClicked() {
                                        loadSkinsFromNetwork(append);
                                    }

                                }).show(getActivity());
                    }
                }
            }

        }).execute();
    }

}