ca.etsmtl.applets.etsmobile.fragments.NewsListFragment.java Source code

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Here is the source code for ca.etsmtl.applets.etsmobile.fragments.NewsListFragment.java

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/*******************************************************************************
 * Copyright 2013 Club ApplETS
 * 
 * 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 ca.etsmtl.applets.etsmobile.fragments;

import java.util.ArrayList;

import android.app.Activity;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.view.View;
import android.widget.ListView;
import ca.etsmtl.applets.etsmobile.adapters.NewsCursorAdapter;
import ca.etsmtl.applets.etsmobile.listeners.NewsListSelectedItemListener;
import ca.etsmtl.applets.etsmobile.providers.ETSMobileContentProvider;
import ca.etsmtl.applets.etsmobile.services.NewsService;
import ca.etsmtl.applets.etsmobile.tools.db.NewsTableHelper;

public class NewsListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> {

    // private final static String TAG =
    // "ca.etsmtl.applets.etsmobile.fragments.NewsListFragment";
    private NewsListSelectedItemListener selectedItemListener;
    private NewsCursorAdapter adapter;

    public static final int ID = 1;

    @Override
    public void onAttach(final Activity activity) {
        super.onAttach(activity);
        try {
            selectedItemListener = (NewsListSelectedItemListener) activity;
        } catch (final ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + "l'activit doit implmenter l'interface NewsListSelectedItemListener");
        }
    }

    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getLoaderManager().initLoader(NewsListFragment.ID, null, this);
        adapter = new NewsCursorAdapter(getActivity().getApplicationContext(), null,
                CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
        setListAdapter(adapter);
    }

    @Override
    public Loader<Cursor> onCreateLoader(final int id, final Bundle bundle) {
        final String[] projection = { NewsTableHelper.NEWS_ID, NewsTableHelper.NEWS_GUID,
                NewsTableHelper.NEWS_TITLE, NewsTableHelper.NEWS_DATE, NewsTableHelper.NEWS_DESCRIPTION,
                NewsTableHelper.NEWS_SOURCE };

        final SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(getActivity().getApplicationContext());
        final ArrayList<String> source = new ArrayList<String>();
        if (prefs.getBoolean("rssETS", true)) {
            source.add(NewsService.RSS_ETS);
        }
        if (prefs.getBoolean("facebook", true)) {
            source.add(NewsService.FACEBOOK);
        }
        if (prefs.getBoolean("twitter", true)) {
            source.add(NewsService.TWITTER);
        }
        if (prefs.getBoolean("interface", true)) {
            source.add(NewsService.INTERFACE);
        }

        final String[] s = new String[source.size()];
        for (int i = 0; i < source.size(); i++) {
            s[i] = source.get(i);
        }

        final CursorLoader cursorLoader = new CursorLoader(

                getActivity(), ETSMobileContentProvider.CONTENT_URI_NEWS, projection, null, s,
                NewsTableHelper.NEWS_DATE + " DESC");

        return cursorLoader;
    }

    @Override
    public void onDestroy() {
        getLoaderManager().destroyLoader(NewsListFragment.ID);
        super.onDestroy();
    }

    @Override
    public void onListItemClick(final ListView l, final View v, final int position, final long id) {
        selectedItemListener.onItemClick(v);
    }

    @Override
    public void onLoaderReset(final Loader<Cursor> loader) {
        adapter.swapCursor(null);
    }

    @Override
    public void onLoadFinished(final Loader<Cursor> loader, final Cursor cursor) {
        adapter.swapCursor(cursor);
    }

}