Get Google Weather

It's another online weather info provided by Google:
http://www.google.com/ig/api?hl=en&weather=new%20york

Similar to Yahoo! Weather. It return weather information in XML format. It's a example to get New York weather from Google.

package com.exercise.AndroidGoogleWeather;

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 java.util.ArrayList;
import java.util.List;

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.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidGoogleWeatherActivity extends Activity {

class CurrentConditions{
 String condition;
 String temp_f;
 String temp_c;
 String humidity;
 String icon;
 String wind_condition;
}

class ForecastConditions{
 String day_of_week;
 String low;
 String high;
 String icon;
 String condition;
}

CurrentConditions currentConditions;
List<ForecastConditions> forecastConditionsList;

TextView tvCurrentConditions;


   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       tvCurrentConditions = (TextView)findViewById(R.id.currentconditions);
      
       String weatherString = QueryGoogleWeather();
       Document weatherDoc = convertStringToDocument(weatherString);
       parseGoogleWeather(weatherDoc);
      
       //Display Result
    String s = "\n"
         + currentConditions.condition + "\n"
         + currentConditions.temp_f + "\n"
         + currentConditions.temp_c + "\n"
         + currentConditions.humidity + "\n"
         + currentConditions.icon + "\n"
         + currentConditions.wind_condition + "\n";
   
    for(int k=0; k < 4; k++){
         s += "\n"
         + forecastConditionsList.get(k).condition + "\n"
         + forecastConditionsList.get(k).day_of_week + "\n"
         + forecastConditionsList.get(k).low + "\n"
         + forecastConditionsList.get(k).high + "\n"
         + forecastConditionsList.get(k).icon + "\n"; 
    }
       
       tvCurrentConditions.setText(s);
      
   }
  
   private void parseGoogleWeather(Document srcDoc){
   
    currentConditions = new CurrentConditions();
   
    //-- Get current_conditions
    NodeList current_conditions = srcDoc.getElementsByTagName("current_conditions");
    NodeList currentChilds = current_conditions.item(0).getChildNodes();

    for(int i=0; i<currentChilds.getLength(); i++){
     Node n = currentChilds.item(i);
    
     String nName = n.getNodeName();
     String nValue
      = n.getAttributes().getNamedItem("data").getNodeValue().toString();
     if (nName.equalsIgnoreCase("condition")){
      currentConditions.condition = nValue;
     }else if((nName.equalsIgnoreCase("temp_f"))){
      currentConditions.temp_f = nValue;
     }else if((nName.equalsIgnoreCase("temp_c"))){
      currentConditions.temp_c = nValue;
     }else if((nName.equalsIgnoreCase("humidity"))){
      currentConditions.humidity = nValue;
     }else if((nName.equalsIgnoreCase("icon"))){
      currentConditions.icon = nValue;
     }else if((nName.equalsIgnoreCase("wind_condition"))){
      currentConditions.wind_condition = nValue;
     }
    }
   
    //-- Get forecast_conditions
    NodeList forecast_conditions = srcDoc.getElementsByTagName("forecast_conditions");
    int forecast_conditions_length = forecast_conditions.getLength();
   
    forecastConditionsList = new ArrayList<ForecastConditions>();
   
    for(int j=0; j<forecast_conditions_length; j++){
    
     ForecastConditions tmpForecastConditions = new ForecastConditions();
    
     NodeList forecasrChilds = forecast_conditions.item(j).getChildNodes();
    
     for(int i=0; i<forecasrChilds.getLength(); i++){
     
         Node n = forecasrChilds.item(i);
        
         String nName = n.getNodeName();
         String nValue
          = n.getAttributes().getNamedItem("data").getNodeValue().toString();
        
         if (nName.equalsIgnoreCase("condition")){
          tmpForecastConditions.condition = nValue;
         }else if((nName.equalsIgnoreCase("day_of_week"))){
          tmpForecastConditions.day_of_week = nValue;
         }else if((nName.equalsIgnoreCase("low"))){
          tmpForecastConditions.low = nValue;
         }else if((nName.equalsIgnoreCase("high"))){
          tmpForecastConditions.high = nValue;
         }else if((nName.equalsIgnoreCase("icon"))){
          tmpForecastConditions.icon = nValue;
         }
        
        }
    
     forecastConditionsList.add(tmpForecastConditions);
       
    }


   }
  
   private Document convertStringToDocument(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(AndroidGoogleWeatherActivity.this,
       e1.toString(), Toast.LENGTH_LONG).show();
 } catch (SAXException e) {
  e.printStackTrace();
  Toast.makeText(AndroidGoogleWeatherActivity.this,
       e.toString(), Toast.LENGTH_LONG).show();
 } catch (IOException e) {
  e.printStackTrace();
  Toast.makeText(AndroidGoogleWeatherActivity.this,
       e.toString(), Toast.LENGTH_LONG).show();
 }
   
    return dest;
   }
  
   private String QueryGoogleWeather(){
    String qResult = "";
    String queryString = "http://www.google.com/ig/api?hl=en&weather=new%20york";
   
    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(AndroidGoogleWeatherActivity.this,
       e.toString(), Toast.LENGTH_LONG).show();
 } catch (IOException e) {
  e.printStackTrace();
  Toast.makeText(AndroidGoogleWeatherActivity.this,
       e.toString(), Toast.LENGTH_LONG).show();
 }
   
       return qResult;
   }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:orientation="vertical" >

<TextView
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="@string/hello" />
   <ScrollView
       android:layout_width="fill_parent"
       android:layout_height="fill_parent">
       <TextView
           android:id="@+id/currentconditions"
           android:layout_width="fill_parent"
           android:layout_height="wrap_content" />
</ScrollView>
</LinearLayout>

You have to modify AndroidManifest.xml to grand permission of "android.permission.INTERNET"

Download the files.

Next:
- Google Weather App

Related:
- Get weather info from Yahoo! Weather RSS Feed.
- Get description from Yahoo! Weather RSS feed, and display in WebView.