RssFeedFragment.java

/*
 *      ____.____  __.____ ___     _____
 *     |    |    |/ _|    |   \   /  _  \ ______ ______
 *     |    |      < |    |   /  /  /_\  \\____ \\____ \
 * /\__|    |    |  \|    |  /  /    |    \  |_> >  |_> >
 * \________|____|__ \______/   \____|__  /   __/|   __/
 *                  \/                  \/|__|   |__|
 *
 * Copyright (c) 2014-2015 Paul "Marunjar" Pretsch
 *
 * 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 org.voidsink.anewjkuapp.rss;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import org.voidsink.anewjkuapp.R;
import org.voidsink.anewjkuapp.base.BaseFragment;
import org.voidsink.anewjkuapp.rss.lib.FeedEntry;
import org.voidsink.anewjkuapp.rss.lib.FeedLoader;
import org.voidsink.anewjkuapp.utils.Consts;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

public class RssFeedFragment extends BaseFragment implements LoaderManager.LoaderCallbacks<List<FeedEntry>> {

    private URL mUrl = null;
    private RssListAdapter mAdapter;

    @Override
    public void setArguments(Bundle args) {
        super.setArguments(args);

        try {
            final String url = args.getString(Consts.ARG_FEED_URL);
            if (url != null) {
                mUrl = new URL(url);
            }
        } catch (MalformedURLException e) {
            mUrl = null;
        }
    }

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

        final RecyclerView mRecyclerView = (RecyclerView) v.findViewById(R.id.recyclerView);

        mRecyclerView.setHasFixedSize(true); // performance

        mAdapter = new RssListAdapter(getContext(), null);
        mRecyclerView.setAdapter(mAdapter);
        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.VERTICAL));

        return v;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        getLoaderManager().initLoader(0, null, this);
    }

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

        updateData();
    }

    private void updateData() {
        getLoaderManager().restartLoader(0, null, this);
    }

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

        inflater.inflate(R.menu.rss_feed, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_refresh_feed:
                updateData();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public Loader<List<FeedEntry>> onCreateLoader(int id, Bundle args) {
        showProgressIndeterminate();

        return new FeedLoader(getContext(), mUrl);
    }

    @Override
    public void onLoadFinished(Loader<List<FeedEntry>> loader, List<FeedEntry> data) {
        mAdapter.clear();
        if (data != null) {
            mAdapter.addAll(data);
        }
        mAdapter.notifyDataSetChanged();

        finishProgress();
    }

    @Override
    public void onLoaderReset(Loader<List<FeedEntry>> loader) {
        mAdapter.clear();
        mAdapter.notifyDataSetChanged();

        finishProgress();
    }
}