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The source code is released under:
GNU General Public License
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package com.imlongluo.weather.apis; //ww w . j a v a 2 s . co m 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.net.SocketTimeoutException; 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.conn.ConnectTimeoutException; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.xml.sax.SAXException; import com.imlongluo.weather.apis.UserLocationUtils.LocationResult; import com.imlongluo.weather.apis.WeatherInfo.ForecastInfo; import android.content.Context; import android.location.Location; import android.os.AsyncTask; /** * A wrapper for accessing Yahoo weather informations. * * @author */ public class YahooWeather implements LocationResult { private static final int CONNECT_TIMEOUT_DEFAULT = 20 * 1000; private static final int SOCKET_TIMEOUT_DEFAULT = 20 * 1000; public enum SEARCH_MODE { GPS, PLACE_NAME } public static final String YAHOO_WEATHER_ERROR = "Yahoo! Weather - Error"; public static final int FORECAST_INFO_MAX_SIZE = 5; private String mWoeidNumber; private YahooWeatherInfoListener mWeatherInfoResult; private YahooWeatherExceptionListener mExceptionListener; private boolean mNeedDownloadIcons; private SEARCH_MODE mSearchMode; private Context mContext; private static YahooWeather mInstance = new YahooWeather(); public SEARCH_MODE getSearchMode() { return mSearchMode; } public void setSearchMode(SEARCH_MODE searchMode) { mSearchMode = searchMode; } /** * Get the YahooWeather instance. Use this to query weather information from * Yahoo. * * @return YahooWeather instance */ public static YahooWeather getInstance() { getInstance(CONNECT_TIMEOUT_DEFAULT, SOCKET_TIMEOUT_DEFAULT); return mInstance; } /** * Get the YahooWeather instance. Use this to query weather information from * Yahoo. * * @param connectTimeout * in milliseconds, 5 seconds in default * @param socketTimeout * in milliseconds, 5 seconds in default * @return YahooWeather instance */ public static YahooWeather getInstance(int connectTimeout, int socketTimeout) { return getInstance(connectTimeout, socketTimeout, false); } /** * Get the YahooWeather instance. Use this to query weather information from * Yahoo. * * @param connectTimeout * in milliseconds, 5 seconds in default * @param socketTimeout * in milliseconds, 5 seconds in default * @param isDebbugable * set if you want some debug log in Logcat * @return YahooWeather instance */ public static YahooWeather getInstance(int connectTimeout, int socketTimeout, boolean isDebuggable) { YahooWeatherLog.setDebuggable(isDebuggable); NetworkUtils.getInstance().setConnectTimeout(connectTimeout); NetworkUtils.getInstance().setSocketTimeout(socketTimeout); return mInstance; } /** * Set it to true will enable downloading the default weather icons. The * Default icons are too tiny, so in most cases, you don't need them. * * @param needDownloadIcons * Weather it will enable downloading the default weather icons */ public void setNeedDownloadIcons(final boolean needDownloadIcons) { mNeedDownloadIcons = needDownloadIcons; } /** * Set exception listener. If this is not set, stack info will be printed in * logcat if {@link isDebuggable} is set to true. Remember, these methodas * may be called on background thread. Therefore, any UI related activities * must be post to UI thread, using {@link Handler} or something else. * * @param exceptionListener */ public void setExceptionListener(final YahooWeatherExceptionListener exceptionListener) { this.mExceptionListener = exceptionListener; WOEIDUtils.getInstance().setExceptionListener(exceptionListener); } /** * Use a name of place to query Yahoo weather apis for weather information. * Querying will be run on a separated thread to accessing Yahoo's apis. * When it is completed, a callback will be fired. See * {@link YahooWeatherInfoListener} for detail. * * @param context * app's context * @param cityAreaOrLocation * A city name, like "Shanghai"; an area name, like * "Mountain View"; a pair of city and country, like * "Tokyo, Japan"; a location or view spot, like "Eiffel Tower"; * Yahoo's apis will find a closest position for you. * @param result * A {@link WeatherInfo} instance. */ public void queryYahooWeatherByPlaceName(final Context context, final String cityAreaOrLocation, final YahooWeatherInfoListener result) { YahooWeatherLog.d("query yahoo weather by name of place"); mContext = context; if (!NetworkUtils.isConnected(context)) { if (mExceptionListener != null) mExceptionListener.onFailConnection(new Exception("Network is not avaiable")); return; } final String convertedlocation = AsciiUtils.convertNonAscii(cityAreaOrLocation); mWeatherInfoResult = result; final WeatherQueryByPlaceTask task = new WeatherQueryByPlaceTask(); task.execute(new String[] { convertedlocation }); } /** * Use lat & lon pair to query Yahoo weather apis for weather information. * Querying will be run on a separated thread to accessing Yahoo's apis. * When it is completed, a callback will be fired. See * {@link YahooWeatherInfoListener} for detail. * * @param context * app's context * @param lat * A string of latitude value * @param lon * A string of longitude value * @param result * A {@link WeatherInfo} instance */ public void queryYahooWeatherByLatLon(final Context context, final String lat, final String lon, final YahooWeatherInfoListener result) { YahooWeatherLog.d("query yahoo weather by lat lon"); mContext = context; if (!NetworkUtils.isConnected(context)) { if (mExceptionListener != null) mExceptionListener.onFailConnection(new Exception("Network is not avaiable")); return; } mWeatherInfoResult = result; final WeatherQueryByLatLonTask task = new WeatherQueryByLatLonTask(); task.execute(new String[] { lat, lon }); } /** * Use your device's GPS to automatically detect where you are, then query * Yahoo weather apis for weather information. * * @param context * app's context * @param result * A {@link WeatherInfo} instance */ public void queryYahooWeatherByGPS(final Context context, final YahooWeatherInfoListener result) { YahooWeatherLog.d("query yahoo weather by gps, result=" + result); if (!NetworkUtils.isConnected(context)) { if (mExceptionListener != null) { mExceptionListener.onFailConnection(new Exception("Network is not avaiable")); } return; } mContext = context; mWeatherInfoResult = result; (new UserLocationUtils()).findUserLocation(context, this); } @Override public void gotLocation(Location location) { YahooWeatherLog.d("gotLocation, location=" + location + ", lat=" + location.getLatitude() + ",lon=" + location.getLongitude()); if (location == null) { if (mExceptionListener != null) mExceptionListener.onFailFindLocation(new Exception("Location cannot be found")); return; } final String lat = String.valueOf(location.getLatitude()); final String lon = String.valueOf(location.getLongitude()); final WeatherQueryByLatLonTask task = new WeatherQueryByLatLonTask(); task.execute(new String[] { lat, lon }); } private String getWeatherString(Context context, String woeidNumber) { YahooWeatherLog.d("query yahoo weather with WOEID number : " + woeidNumber); String qResult = ""; String queryUrl = "http://weather.yahooapis.com/forecastrss?w=" + woeidNumber; YahooWeatherLog.d("query url : " + queryUrl); HttpClient httpClient = NetworkUtils.createHttpClient(); HttpGet httpGet = new HttpGet(queryUrl); 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 readLine = null; while ((readLine = bufferedreader.readLine()) != null) { YahooWeatherLog.d(readLine); stringBuilder.append(readLine + "\n"); } qResult = stringBuilder.toString(); } } catch (ClientProtocolException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailConnection(e); } catch (ConnectTimeoutException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailConnection(e); } catch (SocketTimeoutException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailConnection(e); } catch (IOException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailConnection(e); } finally { httpClient.getConnectionManager().shutdown(); } 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 e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailParsing(e); } catch (SAXException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailParsing(e); } catch (IOException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailParsing(e); } return dest; } private WeatherInfo parseWeatherInfo(Context context, Document doc, WOEIDInfo woeidInfo) { 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()); if (mNeedDownloadIcons) { weatherInfo.setCurrentConditionIcon(ImageUtils.getBitmapFromWeb(weatherInfo .getCurrentConditionIconURL())); } for (int i = 0; i < FORECAST_INFO_MAX_SIZE; i++) { this.parseForecastInfo(weatherInfo.getForecastInfoList().get(i), doc, i); } /* * pass some woied info */ weatherInfo.mWOEIDneighborhood = woeidInfo.mNeighborhood; weatherInfo.mWOEIDCounty = woeidInfo.mCounty; weatherInfo.mWOEIDState = woeidInfo.mState; weatherInfo.mWOEIDCountry = woeidInfo.mCountry; } catch (NullPointerException e) { YahooWeatherLog.printStack(e); if (mExceptionListener != null) mExceptionListener.onFailParsing(e); weatherInfo = null; } return weatherInfo; } private void parseForecastInfo(final ForecastInfo forecastInfo, final Document doc, final int index) { Node forecast1ConditionNode = doc.getElementsByTagName("yweather:forecast").item(index); forecastInfo.setForecastCode(Integer.parseInt(forecast1ConditionNode.getAttributes() .getNamedItem("code").getNodeValue())); forecastInfo.setForecastText(forecast1ConditionNode.getAttributes().getNamedItem("text") .getNodeValue()); forecastInfo.setForecastDate(forecast1ConditionNode.getAttributes().getNamedItem("date") .getNodeValue()); forecastInfo.setForecastDay(forecast1ConditionNode.getAttributes().getNamedItem("day") .getNodeValue()); forecastInfo.setForecastTempHighF(Integer.parseInt(forecast1ConditionNode.getAttributes() .getNamedItem("high").getNodeValue())); forecastInfo.setForecastTempLowF(Integer.parseInt(forecast1ConditionNode.getAttributes() .getNamedItem("low").getNodeValue())); if (mNeedDownloadIcons) { forecastInfo.setForecastConditionIcon(ImageUtils.getBitmapFromWeb(forecastInfo .getForecastConditionIconURL())); } } private class WeatherQueryByPlaceTask extends AsyncTask<String, Void, WeatherInfo> { @Override protected WeatherInfo doInBackground(String... cityName) { if (cityName == null || cityName.length > 1) { throw new IllegalArgumentException( "Parameter of WeatherQueryByPlaceTask is illegal"); } WOEIDUtils woeidUtils = WOEIDUtils.getInstance(); mWoeidNumber = woeidUtils.getWOEID(mContext, cityName[0]); if (!mWoeidNumber.equals(WOEIDUtils.WOEID_NOT_FOUND)) { String weatherString = getWeatherString(mContext, mWoeidNumber); Document weatherDoc = convertStringToDocument(mContext, weatherString); WeatherInfo weatherInfo = parseWeatherInfo(mContext, weatherDoc, woeidUtils.getWoeidInfo()); return weatherInfo; } else { return null; } } @Override protected void onPostExecute(WeatherInfo result) { // TODO Auto-generated method stub super.onPostExecute(result); mWeatherInfoResult.gotWeatherInfo(result); mContext = null; } } private class WeatherQueryByLatLonTask extends AsyncTask<String, Void, WeatherInfo> { @Override protected WeatherInfo doInBackground(String... params) { if (params == null || params.length != 2) { throw new IllegalArgumentException( "Parameter of WeatherQueryByLatLonTask is illegal"); } final String lat = params[0]; final String lon = params[1]; WOEIDUtils woeidUtils = WOEIDUtils.getInstance(); mWoeidNumber = woeidUtils.getWOEID(mContext, lat, lon); if (!mWoeidNumber.equals(WOEIDUtils.WOEID_NOT_FOUND)) { String weatherString = getWeatherString(mContext, mWoeidNumber); Document weatherDoc = convertStringToDocument(mContext, weatherString); WeatherInfo weatherInfo = parseWeatherInfo(mContext, weatherDoc, woeidUtils.getWoeidInfo()); return weatherInfo; } else { return null; } } @Override protected void onPostExecute(WeatherInfo result) { super.onPostExecute(result); mWeatherInfoResult.gotWeatherInfo(result); mContext = null; } } }