com.wbs.itm.TimetableActivity.java Source code

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Here is the source code for com.wbs.itm.TimetableActivity.java

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/**
 * Copyright 2013 Bhavyanshu Parasher   
 * This file is part of "ITM University Android Application".
 * "ITM University Android Application" 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.
 * "ITM University Android Application" 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 "ITM University Android Application". 
 * If not, see http://www.gnu.org/licenses/.
 */

/**
 * Fetches class names for timetable from JSON data.
 */
package com.wbs.itm;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.google.analytics.tracking.android.EasyTracker;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class TimetableActivity extends ListActivity {

    private ProgressDialog pDialog;
    JSONParser jParser = new JSONParser();
    ArrayList<HashMap<String, String>> timetableList;
    private static String url_all_timetable = "http://thewbs.getfreehosting.co.uk/itmuapp/fetchtimetable.php";
    private static final String TAG_SUCCESS = "success";
    private static final String TAG_TIMETABLES = "timetable";
    private static final String TAG_PID = "tid";
    private static final String TAG_NAME = "class";
    private static final String TAG_INFO = "url";

    JSONArray timetables = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.all_products);

        timetableList = new ArrayList<HashMap<String, String>>();

        new LoadAllTimetables().execute();

        ListView lv = getListView();
        lv.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String pid = ((TextView) view.findViewById(R.id.rinfo)).getText().toString();
                Intent in = new Intent(getApplicationContext(), PhotoViewercse.class);
                in.putExtra("pathid", pid);
                startActivityForResult(in, 100);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        // if result code 100
        if (resultCode == 100) {
            Intent intent = getIntent();
            finish();
            startActivity(intent);
        }
    }

    class LoadAllTimetables extends AsyncTask<String, String, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(TimetableActivity.this);
            pDialog.setMessage("Loading timetable. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected String doInBackground(String... args) {
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            JSONObject json = jParser.makeHttpRequest(url_all_timetable, "GET", params);
            Log.d("All Classes: ", json.toString());
            try {
                int success = json.getInt(TAG_SUCCESS);
                if (success == 1) {
                    timetables = json.getJSONArray(TAG_TIMETABLES);
                    for (int i = 0; i < timetables.length(); i++) {
                        JSONObject c = timetables.getJSONObject(i);
                        String id = c.getString(TAG_PID);
                        String name = c.getString(TAG_NAME);
                        String info = c.getString(TAG_INFO);
                        HashMap<String, String> map = new HashMap<String, String>();
                        map.put(TAG_PID, id);
                        map.put(TAG_NAME, name);
                        map.put(TAG_INFO, info);
                        timetableList.add(map);
                    }
                } else {
                    // nothing found to be implemented.
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return null;
        }

        /**
         * After completing background task Dismiss the progress dialog
         * **/
        @Override
        protected void onPostExecute(String file_url) {
            pDialog.dismiss();
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    /**
                     * Updating parsed JSON data into ListView
                     * */
                    ListAdapter adapter = new SimpleAdapter(TimetableActivity.this, timetableList,
                            R.layout.list_item, new String[] { TAG_PID, TAG_NAME, TAG_INFO },
                            new int[] { R.id.rid, R.id.rname, R.id.rinfo });
                    setListAdapter(adapter);
                }
            });
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        EasyTracker.getInstance().activityStart(this); // Add this method
    }

    @Override
    protected void onStop() {
        super.onStop();
        EasyTracker.getInstance().activityStop(this); // Add this method
    }
}