Android Open Source - rss Pager Adapter Tags

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*
 * 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./* www .  j  a  v a  2s  . c o m*/
 *
 * 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 com.poloure.simplerss;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.PagerAdapter;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import static com.poloure.simplerss.Constants.*;

public
class PagerAdapterTags extends FragmentPagerAdapter
{
    static List<String> s_tagList = new ArrayList<String>(0);

    PagerAdapterTags(FragmentManager fm, Context context, Iterable<IndexItem> indexItems)
    {
        super(fm);

        s_tagList = getTagsFromIndex(context, indexItems);
        notifyDataSetChanged();
    }

    static
    List<String> getTagsFromIndex(Context context, Iterable<IndexItem> indexItems)
    {
        // Get the all tag from resources.
        String allTag = context.getString(R.string.all_tag);

        // Make the allTag the first tag.
        Set<String> tagSet = Collections.synchronizedSet(new LinkedHashSet<String>(0));
        tagSet.add(allTag);

        if(null != indexItems)
        {
            for(IndexItem indexItem : indexItems)
            {
                tagSet.addAll(Arrays.asList(indexItem.m_tags));
            }
        }

        return new ArrayList<String>(tagSet);
    }

    public static
    void run(FeedsActivity activity)
    {
        s_tagList = getTagsFromIndex(activity, activity.m_index);
        PagerAdapter adapter = s_viewPager.getAdapter();
        adapter.notifyDataSetChanged();
    }

    @Override
    public
    Fragment getItem(int position)
    {
        return ListFragmentTag.newInstance(position);
    }

    @Override
    public
    int getCount()
    {
        return s_tagList.size();
    }

    @Override
    public
    int getItemPosition(Object object)
    {
        int pos = s_tagList.indexOf(object);
        return -1 == pos ? PagerAdapter.POSITION_NONE : pos;
    }

    @Override
    public
    String getPageTitle(int position)
    {
        return s_tagList.get(position);
    }
}

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