Android Open Source - sigimera-android-app Crises List Fragment

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License

The source code is released under:
GNU General Public License
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Java Source Code

/**
 * Sigimera Crises Information Platform Android Client
 * Copyright (C) 2012 by Sigimera/*from   w  ww.j a v  a2s.c  om*/
 * All Rights Reserved
 *
 * 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 2 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, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.sigimera.app.android;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Observable;
import java.util.Observer;

import org.sigimera.app.android.R;
import org.sigimera.app.android.controller.ApplicationController;
import org.sigimera.app.android.controller.PersistanceController;
import org.sigimera.app.android.exception.AuthenticationErrorException;
import org.sigimera.app.android.model.Constants;
import org.sigimera.app.android.model.Crisis;
import org.sigimera.app.android.util.Common;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;

/**
 * @author Corneliu-Valentin Stanciu, Alex Oberhauser
 * @email corneliu.stanciu@sigimera.org, alex.oberhauser@sigimera.org
 */
public class CrisesListFragment extends Fragment implements Observer {
    private ArrayList<Crisis> crises;
    private ListView list;

    private int page = 1;
    private String authToken = null;
    //  private boolean showMore = true;
    private SimpleAdapter adapterMainList;
    private ProgressDialog progessDialog;
    private Bundle arguments;

    private final Handler guiHandler = new Handler();
    private final Runnable updateGUI = new Runnable() {
        @Override
        public void run() {
            showCrises();
        }
    };

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

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

        this.list = (ListView) view.findViewById(R.id.crisis_list);
        this.list.setOnItemClickListener(this.clickListener);
        //    this.list.setOnScrollListener(this.scrollListener);
        registerForContextMenu(this.list);
        this.arguments = getArguments();

        this.progessDialog = ProgressDialog.show(getActivity(), "Preparing crises information!",
                "Please be patient until the information are ready...");
        Thread worker = new Thread() {
            @SuppressWarnings("unchecked")
            @Override
            public void run() {
                Looper.prepare();
                try {
                    authToken = ApplicationController.getInstance().getSessionHandler().getAuthenticationToken();
                    PersistanceController.getInstance().addObserver(CrisesListFragment.this);

                    // If there are crises passed as arguments -> show them
                    if ( arguments != null ) {
                        Object object = getArguments().getSerializable("crises");
                        if ( object != null )
                            crises = (ArrayList<Crisis>) object;
                    }
                    // otherwise check if the user wants to have near crises on crises list
                    else if (PersistanceController.getInstance().getUsersStats(authToken).getRadius() != 0) {
                        Log.i("[CRISES LIST]", "Show the near crises into the crises list");
                        crises = PersistanceController.getInstance().getNearCrises();
                    }
                } catch (AuthenticationErrorException e) {
                    Log.d(Constants.LOG_TAG_SIGIMERA_APP, "Fetching public crises list...");
                }

                if ( crises == null || crises.isEmpty() )
                    crises = PersistanceController.getInstance().getCrises(authToken, page);

                guiHandler.post(updateGUI);
            }
        };
        worker.start();

        return view;
    }

    private void showCrises() {
        if (getActivity() != null) {
            ArrayList<HashMap<String, String>> crisesList = new ArrayList<HashMap<String, String>>();

            HashMap<String, String> listEntry;

            Iterator<Crisis> iter = this.crises.iterator();
            while ( iter.hasNext() ) {
                Crisis entry = iter.next();

                listEntry = new HashMap<String, String>();
                listEntry.put("type_icon", entry.getTypeIcon());
                listEntry.put("short_title", entry.getShortTitle());
                listEntry.put("dc_date", Common.getTimeAgoInWords(Common.getMiliseconds(entry.getDate())));

                crisesList.add(listEntry);
            }
            this.adapterMainList = new SimpleAdapter(getActivity(), crisesList, R.layout.list_entry,
                    new String[] { "type_icon", "short_title", "dc_date" },
                    new int[] { R.id.icon, R.id.topText, R.id.bottomText });

            this.list.setAdapter(adapterMainList);

            this.progessDialog.dismiss();
        }
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("Options");
        menu.setHeaderIcon(R.drawable.sigimera_logo);
        MenuInflater inflater = new MenuInflater(getActivity());
        inflater.inflate(R.menu.list_menu, menu);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
        switch (item.getItemId()) {
            case R.id.open:
                Intent crisisActivity = new Intent(getActivity(), CrisisActivity.class);
                crisisActivity.putExtra(Constants.CRISIS_ID, getCrisisID(info.position));
                startActivity(crisisActivity);
                return true;
            case R.id.share:
                this.startActivity(Common.shareCrisis(getCrisisID(info.position), getCrisisShortTitle(info.position)));
                return true;
            default:
                return super.onContextItemSelected(item);
        }
    }

    OnItemClickListener clickListener = new OnItemClickListener() {
        public void onItemClick(AdapterView<?> arg0, View arg1, int _position,
                long arg3) {
            Intent crisisActivity = new Intent(getActivity(), CrisisActivity.class);
            crisisActivity.putExtra(Constants.CRISIS_ID, crises.get(_position).getID());

            startActivity(crisisActivity);
        }
    };

    //  OnScrollListener scrollListener = new OnScrollListener() {
    //    @Override
    //    public void onScrollStateChanged(AbsListView view, int scrollState) {}
    //
    //    @Override
    //    public void onScroll(AbsListView view, int firstVisibleItem,
    //        int visibleItemCount, int totalItemCount) {
    //
    //      if ( adapterMainList != null ) {
    //        int lastItem = firstVisibleItem + visibleItemCount;
    //        if ( lastItem == totalItemCount && showMore ) {
    //          System.out.println("DEBUG");
    //          page += 1;
    //          cursor = CrisesController.getInstance().getCrises(auth_token, page);
    ////          cursor.registerDataSetObserver(new DataSetObserver() {});
    ////          adapterMainList.notifyDataSetChanged();
    ////          adapterMainList.bindView(arg0, arg1, arg2)
    //          showMore = false;
    //        }
    //      }
    //    }
    //  };

    /**
     * Get the crisis ID from cursor.
     * @param position The row number in crises cursor.
     * @return crisis ID
     */
    private String getCrisisID(int position) {
        return this.crises.get(position).getID();
    }

    private String getCrisisShortTitle(int position) {
        return this.crises.get(position).getShortTitle();
    }

    //  private void showMoreCrises() {
    //    cursor = CrisesController.getInstance().getCrises(auth_token, page);
    //    showMore = true;
    //  }

    @Override
    public void update(Observable arg0, Object arg1) {
        int radius = (Integer) arg1;
        if ( radius != 0 ) {
            crises = PersistanceController.getInstance().getNearCrises();
        } else {
            crises = PersistanceController.getInstance().getCrises(authToken, page);
        }

        showCrises();
    }
}
Java Source Code List
