Android weather forecast - Yahoo Weather API - FULL SOURCE

nguyendat · by **nguyendat** » Tue May 10, 2011 5:44 pm

OUTLINE
This is almost my very first tutorials, feel free to give your comment
For Google Weather API you could refer tutorial of plusminus at:

Code: Select all: http://www.anddev.org/advanced-tutorials-f21/android-weather-forecast-google-weather-api-description-t337.html

NOTE
In this tutorial i use format like plusminus
What you learn: You will learn how to access the Yahoo Weather API an parse the XML-Result using a DOM parser.

:idea:

Designed/Tested with sdk-version: Emulator Android SDK 2.2

What this contains:

* Access the Yahoo Weather API by WOEID
* Get WOEID and WEATHER by location (Big thanks to vicchi from http://stackoverflow.com/questions/1822 ... -retrieval)
* Parse XML Files (Streams) using the DOM
* Add widget version (04/07/2011)

SCREENSHOT
What it will look like:

: mainscreen.png (57.87 KiB) Viewed 7238 times

And location search screen:

: searchlocation.png (37.13 KiB) Viewed 7238 times

YAHOO API
In this tutorial i use 2 API from yahoo API, one fo archiving WOEID by location and other for get weather by WOEID:
1.http://query.yahooapis.com/v1/public/yq ... format=xml
2. http://weather.yahooapis.com/forecastrss?w=%s&u=c

BUSINESS FLOW
1. Input Location
2. Get WOEID (Where on Earth IDentifier) by location
3. Get weather by WOEID

CODE SNIPPET:
1. Connect to server get XML data:

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

 
        /***************************************************************************
         * Get Document XML
         * @param strURL URL string
         * @return
         * @throws IOException
         * @date May 9, 2011
         * @time 1:40:54 AM
         * @author DatNQ
         **************************************************************************/
        public Document getDocumentFromURL(String strURL) throws IOException {
                /* Verify URL */
                if (strURL == null){
                        Log.e(TAG,"Invalid input URL");
                        return null;
                }
                
                /* Connect to server */
                requestConnectServer(strURL);
 
                /* Get data from server */
                String strDocContent = getDataFromConnection();
                
                /* Close connection */
                requestDisconnect();
                
                if (strDocContent == null){
                        Log.e(TAG,"Can not get xml content");
                        return null;
                }
                
                int strContentSize = strDocContent.length();
                StringBuffer strBuff = new StringBuffer();
                strBuff.setLength(strContentSize+1);
                strBuff.append(strDocContent);
                ByteArrayInputStream is = new ByteArrayInputStream(strDocContent.getBytes());
 
                DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                DocumentBuilder db;
                Document docData = null;
                
                try {
                        db = dbf.newDocumentBuilder();
                        docData = db.parse(is);
                } catch (Exception e) {
                        Log.e(TAG,"Parser data error");
                        return null;
                }
                
                return docData;
        }
        
        /***************************************************************************
         * Get xml document
         * @return string xml
         * @throws IOException
         * @date May 9, 2011
         * @time 1:43:28 AM
         * @author DatNQ
         **************************************************************************/
        private String getDataFromConnection() throws IOException {
                if (httpConnection == null){
                        Log.e(TAG,"connection is null");
                        return null;
                }
                
                String strValue = null;
                InputStream inputStream = httpConnection.getInputStream();
                if (inputStream == null){
                        Log.e(TAG, "Get input tream error");
                        return null;
                }
                
                StringBuffer strBuf = new StringBuffer();               
                BufferedReader buffReader = new BufferedReader(new InputStreamReader(inputStream));
                String strLine = "";
                
                while ((strLine = buffReader.readLine()) != null){
                        strBuf.append(strLine+"\n");
                        strValue +=strLine+"\n";
                }
                
                /* Release resource to system */
                buffReader.close();
                inputStream.close();
                
                return strBuf.toString();
        }
}
/*******************************************************************************
 * END OF FILE
 ******************************************************************************/
Parsed in 0.039 seconds,  using GeSHi 1.0.8.4

Parser WEATHER:

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

        public static WeatherInfo parserYahooWeatherInfo(Document docWeather){
                if (docWeather == null){
                        Log.e(TAG,"Invalid doc weatehr");
                        return null;
                }
                
                String strCity = null;
                String strCountry = null;
                String strTempUnit = null;
                String strTempValue = null;
                String strHumidity = null;
                String strText = null;;
                String strCode = null;;
                String strDate = null;;
                String strVisi = null;
                try {
                        Element root = docWeather.getDocumentElement();
                        root.normalize();
        
                        NamedNodeMap locationNode = root.getElementsByTagName(PARAM_YAHOO_LOCATION).item(0).getAttributes();
                        
                        if (locationNode != null){
                                strCity = locationNode.getNamedItem(ATT_YAHOO_CITY).getNodeValue();
                                strCountry = locationNode.getNamedItem(ATT_YAHOO_COUNTRY).getNodeValue();
                        }
        
                        NamedNodeMap unitNode = root.getElementsByTagName(PARAM_YAHOO_UNIT).item(0).getAttributes();
                        if (unitNode != null){
                                strTempUnit = unitNode.getNamedItem(ATT_YAHOO_TEMP_UNIT).getNodeValue();
                        }
                        
                        NamedNodeMap atmosNode = root.getElementsByTagName(PARAM_YAHOO_ATMOSPHERE).item(0).getAttributes();
                        if (atmosNode != null){
                                strHumidity = atmosNode.getNamedItem(ATT_YAHOO_HUMIDITY).getNodeValue();
                                strVisi = atmosNode.getNamedItem(ATT_YAHOO_VISI).getNodeValue();
                        }
                        
                        NamedNodeMap conditionNode = root.getElementsByTagName(PARAM_YAHOO_CONDITION).item(0).getAttributes();
                        if (conditionNode != null){
                                strText = conditionNode.getNamedItem(ATT_YAHOO_TEXT).getNodeValue();
                                strCode = conditionNode.getNamedItem(ATT_YAHOO_CODE).getNodeValue();
                                strDate = conditionNode.getNamedItem(ATT_YAHOO_DATE).getNodeValue();
                        }
                        
                        NamedNodeMap temNode = root.getElementsByTagName(PARAM_YAHOO_VALUE).item(0).getAttributes();
                        if (temNode != null){
                                strTempValue = temNode.getNamedItem(ATT_YAHOO_TEMP).getNodeValue();
                        }
                } catch (Exception e){
                        Log.e(TAG,"Something wroing with parser data");
                        return null;
                }
 
                /* Weather info */
                WeatherInfo yahooWeatherInfo = new WeatherInfo(strCity, strCountry, strTempValue,
                                strHumidity, strText, strCode, strDate, strTempUnit, strVisi);
                
                return yahooWeatherInfo;
        }
 
Parsed in 0.038 seconds,  using GeSHi 1.0.8.4

REFERENCE
1. http://stackoverflow.com/questions/1822 ... -retrieval
2. http://developer.yahoo.com/weather/

APK
http://code.google.com/p/yahooweatheran ... k&can=2&q=

FULL SOURCE CODE
http://code.google.com/p/yahooweatherandroid/

SVN:
https://yahooweatherandroid.googlecode.com/svn/trunk

Regards,
DatNQ

suraj209 · by **suraj209** » Wed Feb 29, 2012 7:45 am

Hello sir,
I am a beginner in android. I cant understand how to invoke this api in my app. I installed apk on my emulator but i cant open it as a part of my app. plz suggest me......
Thank you

Android weather forecast - Yahoo Weather API - FULL SOURCE

Android weather forecast - Yahoo Weather API - FULL SOURCE

Re: Android weather forecast - Yahoo Weather API - FULL SOUR

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