Android Open Source - Blue-Sky-Weather Weather Parser Task

• Back to Weather/data  ↑

From Project

Back to project page Blue-Sky-Weather.

License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2011 David Schonert/*from w w  w  .  j a va  2s. c  o  m*/
 *
 * This file is part of BlueSky.
 *
 * BlueSky 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
 * any later version.
 *
 * BlueSky 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 BlueSky.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.SyntheticCode.BlueSkyWeather;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;

/**
 * @author David
 * Starts an AsyncTask for parsing the weather.
 * Displays a ProgressDialog while parsing. Parse can be canceled with back button.
 */
public class WeatherParserTask extends AsyncTask<WeatherStation, Void, WeatherData> {
  BlueSkyActivity parent = null;
  Context appContext = null;

  private WeatherStation station;
  
  public WeatherParserTask(BlueSkyActivity activity) {
    // Get the application context so that if the activity is destroyed
    // while thread is running the context will not be null.
    appContext = activity.getApplicationContext();
    
    attach(activity);
  }
  
  public void attach(BlueSkyActivity activity) {
    this.parent = activity;
  }
  
  public void detach() {
    this.parent = null;
  }
  
  protected void onPreExecute() {
    parent.showDialog(BlueSkyActivity.DIALOG_WEATHER_LOADING);
  }
  
  protected WeatherData doInBackground(WeatherStation... params) {
    
    station = params[0];
    WeatherStation firstAirport = params[1];
    
    WeatherData weather = null;
    WeatherData extraWeather;
    
    //
    try {
      weather = station.parseWeather(this.appContext);
      
      // Only get extra weather for PWS (data that airports are missing should not be filled in)
      if(station.getStationType() == WeatherStation.StationType.PWS) {
        //int index = stationList.getFirstAirport();
        // Airports have some information that weather stations don't so get weather from closest airport
        //if(index != -1) {
        if(firstAirport != null) {
          extraWeather = firstAirport.parseWeather(this.appContext);
          weather.setWeatherCondition(extraWeather.getWeatherCondition());
          weather.setVisibilityMile(extraWeather.getVisibilityMile());
        }
      }
      
    } catch (RuntimeException e) {
      e.printStackTrace();
    }
    
    
    return weather;
  }
  
  protected void onPostExecute(WeatherData result) {
    if(result != null) {
      // Update station with result
      parent.currentWeather = result;
      
      parent.ui.updateWeatherTab(parent.currentWeather);
      
      // Save Data to preferences
      SharedPreferences preferences = parent.getSharedPreferences(BlueSkyActivity.PREF_NAME, BlueSkyActivity.MODE_PRIVATE);
      //SharedPreferences.Editor editor = preferences.edit();
      parent.currentWeather.saveData(preferences);
      //editor.putString(parent.PREF_KEY_STATION, arg1)
      
      String stationTitle = parent.stationList.get(parent.currentStationIndex).getStationTitle();
      String stationElevation = Integer.toString(parent.stationList.get(parent.currentStationIndex).getElevation());
      
      // Change the selected station (wait for parse to get elevation)
      parent.ui.updateSelectedStation(stationTitle, stationElevation);
      //parent.ui.selectedStation.setText(parent.stationList.get(parent.currentStationIndex).getStationTitle() + " (" + parent.stationList.get(parent.currentStationIndex).getElevation() + "ft)");
      
      // Start a forecast parse (if weather parse failed then don't parse forecast)
      // TODO: Check if forecast should be updated or not
      parent.forecastTask = new ForecastParserTask(parent);
      parent.forecastTask.execute(parent.currentLocation);
    }
    else {
      // Warn user 
      Toast.makeText(parent, "Network Error", Toast.LENGTH_LONG).show();
    }
    
    // Close the dialog
    parent.dismissDialog(BlueSkyActivity.DIALOG_WEATHER_LOADING);
  }
  
  public boolean stopParsing() {
    if(station != null) {
      station.stopWeatherParse();
    }
    // Cancel the AsyncTask (isCancled() needs to be checked during doInBackground())
    return cancel(true);
  }
}

Java Source Code List

• Back to Weather/data  ↑