Android Open Source - android-bossweather Yahoo Weather Utils

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright (C) 2011 The Android Open Source Project
 * Copyright (C) 2012 Zhenghong Wang//from   w w  w .j a  va 2 s  .  co m
 *
 * 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 com.michael.feng.utils.YahooWeather4a;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

import android.content.Context;
import android.os.AsyncTask;
import android.widget.Toast;

public class YahooWeatherUtils {
  
  public static final String YAHOO_WEATHER_ERROR = "Yahoo! Weather - Error";
  
  private String woeidNumber;
  private YahooWeatherInfoListener mWeatherInfoResult;

  public static YahooWeatherUtils getInstance() {
    return new YahooWeatherUtils();
  }
  
  public void queryYahooWeather(Context context, String cityName, YahooWeatherInfoListener result) {
    mWeatherInfoResult = result;
    WeatherQueryTask task = new WeatherQueryTask();
    task.setContext(context);
    task.execute(new String[]{cityName});
  }
  
  private String getWeatherString(Context context, String woeidNumber) {
    String qResult = "";
    String queryString = "http://weather.yahooapis.com/forecastrss?w=" + woeidNumber;

    HttpClient httpClient = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(queryString);

    try {
      HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();
      
      if (httpEntity != null) {
        InputStream inputStream = httpEntity.getContent();
        Reader in = new InputStreamReader(inputStream);
        BufferedReader bufferedreader = new BufferedReader(in);
        StringBuilder stringBuilder = new StringBuilder();

        String stringReadLine = null;

        while ((stringReadLine = bufferedreader.readLine()) != null) {
          stringBuilder.append(stringReadLine + "\n");
        }

        qResult = stringBuilder.toString();
      }

    } catch (ClientProtocolException e) {
      e.printStackTrace();
      Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
    } catch (IOException e) {
      e.printStackTrace();
      Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
    }

    return qResult;
  }

  private Document convertStringToDocument(Context context, String src) {
    Document dest = null;

    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder parser;

    try {
      parser = dbFactory.newDocumentBuilder();
      dest = parser.parse(new ByteArrayInputStream(src.getBytes()));
    } catch (ParserConfigurationException e1) {
      e1.printStackTrace();
      Toast.makeText(context, e1.toString(), Toast.LENGTH_LONG).show();
    } catch (SAXException e) {
      e.printStackTrace();
      Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
    } catch (IOException e) {
      e.printStackTrace();
      Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
    }

    return dest;
  }
  
  private WeatherInfo parseWeatherInfo(Context context, Document doc) {
    WeatherInfo weatherInfo = new WeatherInfo();
    try {
      
      Node titleNode = doc.getElementsByTagName("title").item(0);
      
      if(titleNode.getTextContent().equals(YAHOO_WEATHER_ERROR)) {
        return null;
      }
      
      weatherInfo.setTitle(titleNode.getTextContent());
      weatherInfo.setDescription(doc.getElementsByTagName("description").item(0).getTextContent());
      weatherInfo.setLanguage(doc.getElementsByTagName("language").item(0).getTextContent());
      weatherInfo.setLastBuildDate(doc.getElementsByTagName("lastBuildDate").item(0).getTextContent());
      
      Node locationNode = doc.getElementsByTagName("yweather:location").item(0);
      weatherInfo.setLocationCity(locationNode.getAttributes().getNamedItem("city").getNodeValue());
      weatherInfo.setLocationRegion(locationNode.getAttributes().getNamedItem("region").getNodeValue());
      weatherInfo.setLocationCountry(locationNode.getAttributes().getNamedItem("country").getNodeValue());
      
      Node windNode = doc.getElementsByTagName("yweather:wind").item(0);
      weatherInfo.setWindChill(windNode.getAttributes().getNamedItem("chill").getNodeValue());
      weatherInfo.setWindDirection(windNode.getAttributes().getNamedItem("direction").getNodeValue());
      weatherInfo.setWindSpeed(windNode.getAttributes().getNamedItem("speed").getNodeValue());
      
      Node atmosphereNode = doc.getElementsByTagName("yweather:atmosphere").item(0);
      weatherInfo.setAtmosphereHumidity(atmosphereNode.getAttributes().getNamedItem("humidity").getNodeValue());
      weatherInfo.setAtmosphereVisibility(atmosphereNode.getAttributes().getNamedItem("visibility").getNodeValue());
      weatherInfo.setAtmospherePressure(atmosphereNode.getAttributes().getNamedItem("pressure").getNodeValue());
      weatherInfo.setAtmosphereRising(atmosphereNode.getAttributes().getNamedItem("rising").getNodeValue());
      
      Node astronomyNode = doc.getElementsByTagName("yweather:astronomy").item(0);
      weatherInfo.setAstronomySunrise(astronomyNode.getAttributes().getNamedItem("sunrise").getNodeValue());
      weatherInfo.setAstronomySunset(astronomyNode.getAttributes().getNamedItem("sunset").getNodeValue());
      
      weatherInfo.setConditionTitle(doc.getElementsByTagName("title").item(2).getTextContent());
      weatherInfo.setConditionLat(doc.getElementsByTagName("geo:lat").item(0).getTextContent());
      weatherInfo.setConditionLon(doc.getElementsByTagName("geo:long").item(0).getTextContent());
      
      
      
      
      Node currentConditionNode = doc.getElementsByTagName("yweather:condition").item(0);
      weatherInfo.setCurrentCode(
          Integer.parseInt(
              currentConditionNode.getAttributes().getNamedItem("code").getNodeValue()
              ));
      weatherInfo.setCurrentText(
          currentConditionNode.getAttributes().getNamedItem("text").getNodeValue());
      weatherInfo.setCurrentTempF(
          Integer.parseInt(
              currentConditionNode.getAttributes().getNamedItem("temp").getNodeValue()
              ));
      weatherInfo.setCurrentConditionDate(
          currentConditionNode.getAttributes().getNamedItem("date").getNodeValue());
      
      Node forecast1ConditionNode = doc.getElementsByTagName("yweather:forecast").item(0);
      weatherInfo.setForecast1Code(
          Integer.parseInt(
              forecast1ConditionNode.getAttributes().getNamedItem("code").getNodeValue()
              ));
      weatherInfo.setForecast1Text(
          forecast1ConditionNode.getAttributes().getNamedItem("text").getNodeValue());
      weatherInfo.setForecast1Date(
          forecast1ConditionNode.getAttributes().getNamedItem("date").getNodeValue());
      weatherInfo.setForecast1Day(
          forecast1ConditionNode.getAttributes().getNamedItem("day").getNodeValue());
      weatherInfo.setForecast1TempHighF(
          Integer.parseInt(
              forecast1ConditionNode.getAttributes().getNamedItem("high").getNodeValue()
              ));
      weatherInfo.setForecast1TempLowF(
          Integer.parseInt(
              forecast1ConditionNode.getAttributes().getNamedItem("low").getNodeValue()
              ));
      
      
      
      Node forecast2ConditionNode = doc.getElementsByTagName("yweather:forecast").item(1);
      weatherInfo.setForecast2Code(
          Integer.parseInt(
              forecast2ConditionNode.getAttributes().getNamedItem("code").getNodeValue()
              ));
      weatherInfo.setForecast2Text(
          forecast2ConditionNode.getAttributes().getNamedItem("text").getNodeValue());
      weatherInfo.setForecast2Date(
          forecast2ConditionNode.getAttributes().getNamedItem("date").getNodeValue());
      weatherInfo.setForecast2Day(
          forecast2ConditionNode.getAttributes().getNamedItem("day").getNodeValue());
      weatherInfo.setForecast2TempHighF(
          Integer.parseInt(
              forecast2ConditionNode.getAttributes().getNamedItem("high").getNodeValue()
              ));
      weatherInfo.setForecast2TempLowF(
          Integer.parseInt(
              forecast2ConditionNode.getAttributes().getNamedItem("low").getNodeValue()
              ));
      
      
    } catch (NullPointerException e) {
      e.printStackTrace();
      Toast.makeText(context, "Parse XML failed - Unrecognized Tag", Toast.LENGTH_SHORT).show();
      weatherInfo = null;
    }
    
    return weatherInfo;
  }
  
  private class WeatherQueryTask extends AsyncTask<String, Void, WeatherInfo> {
    
    private Context mContext;
    
    public void setContext(Context context) {
      mContext = context;
    }

    @Override
    protected WeatherInfo doInBackground(String... cityName) {
      // TODO Auto-generated method stub
      WOEIDUtils woeidUtils = WOEIDUtils.getInstance();
      woeidNumber = woeidUtils.getWOEIDid(mContext, cityName[0]);
      if(!woeidNumber.equals(WOEIDUtils.WOEID_NOT_FOUND)) {
        String weatherString = getWeatherString(mContext, woeidNumber);
        Document weatherDoc = convertStringToDocument(mContext, weatherString);
        WeatherInfo weatherInfo = parseWeatherInfo(mContext, weatherDoc);
        weatherInfo.setLocationCity(cityName[0]);
        return weatherInfo;
      } else {
        return null;
      }
    }

    @Override
    protected void onPostExecute(WeatherInfo result) {
      // TODO Auto-generated method stub
      super.onPostExecute(result);
      mWeatherInfoResult.gotWeatherInfo(result);
    }
    
  }

}
Java Source Code List
