Android中通过当前经纬度获得城市

 

package com.yy;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import android.content.Context;
import android.location.Location;
import android.location.LocationManager;

public class GetCity {
    /**
     * 借助Google MAP 通过用户当前经纬度 获得用户当前城市
     */
    static final String GOOGLE_MAPS_API_KEY = "abcdefg";

    private LocationManager locationManager;
    private Location currentLocation;
    private String city="全国";
    public GetCity(Context context) {
        this.locationManager = (LocationManager) context
                .getSystemService(Context.LOCATION_SERVICE);
        //只是简单的获取城市 不需要实时更新 所以这里先注释
//      this.locationManager.requestLocationUpdates(
//              LocationManager.GPS_PROVIDER,  1000, 0,
//              new LocationListener() {
//                  public void onLocationChanged(Location loc) {
//                      //当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发
//                      // Save the latest location
//                      currentLocation = loc;
//                      // Update the latitude & longitude TextViews
//                      System.out
//                              .println("getCity()"
//                                      + (loc.getLatitude() + " " + loc
//                                              .getLongitude()));
//                  }
//
//                  public void onProviderDisabled(String arg0) {
//                      System.out.println(".onProviderDisabled(关闭)"+arg0);
//                  }
//
//                  public void onProviderEnabled(String arg0) {
//                      System.out.println(".onProviderEnabled(开启)"+arg0);
//                  }
//
//                  public void onStatusChanged(String arg0, int arg1,
//                          Bundle arg2) {
//                      System.out.println(".onStatusChanged(Provider的转态在可用、" +
//                              "暂时不可用和无服务三个状态直接切换时触发此函数)"+
//                              arg0+" "+arg1+" "+arg2);
//                  }
//              });
        currentLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        if (currentLocation == null)
            currentLocation = locationManager
                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
    }
    /**
     * 开始解析
     */
    public void start() {
        if(currentLocation!=null){
            new Thread(){
                public void run(){
                    String temp=reverseGeocode(currentLocation);
                    if(temp!=null&&temp.length()>=2)
                        city=temp;
                }
            }.start();
        }else{
            System.out.println("GetCity.start()未获得location");
        }
    }

    /**
     * 获得城市
     * @return
     */
    public String getCity(){
        return city;
    }

    /**
     * 通过Google  map api 解析出城市
     * @param loc
     * @return
     */
    public String reverseGeocode(Location loc) {
        // http://maps.google.com/maps/geo?q=40.714224,-73.961452&output=json&oe=utf8&sensor=true_or_false&key=your_api_key
        String localityName = "";
        HttpURLConnection connection = null;
        URL serverAddress = null;

        try {
            // build the URL using the latitude & longitude you want to lookup
            // NOTE: I chose XML return format here but you can choose something
            // else
            serverAddress = new URL("http://maps.google.com/maps/geo?q="
                    + Double.toString(loc.getLatitude()) + ","
                    + Double.toString(loc.getLongitude())
                    + "&output=xml&oe=utf8&sensor=true&key="
                    + GOOGLE_MAPS_API_KEY);
            // set up out communications stuff
            connection = null;

            // Set up the initial connection
            connection = (HttpURLConnection) serverAddress.openConnection();
            connection.setRequestMethod("GET");
            connection.setDoOutput(true);
            connection.setReadTimeout(10000);

            connection.connect();

            try {
                InputStreamReader isr = new InputStreamReader(connection
                        .getInputStream());
                InputSource source = new InputSource(isr);
                SAXParserFactory factory = SAXParserFactory.newInstance();
                SAXParser parser = factory.newSAXParser();
                XMLReader xr = parser.getXMLReader();
                GoogleReverseGeocodeXmlHandler handler = new GoogleReverseGeocodeXmlHandler();

                xr.setContentHandler(handler);
                xr.parse(source);

                localityName = handler.getLocalityName();
                System.out.println("GetCity.reverseGeocode()"+localityName);
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("GetCity.reverseGeocode()"+ex);
        }

        return localityName;
    }

    /**
     * The final piece of this puzzle is parsing the xml that is returned from
     * google’s service. For this example I am using the java SAX (simple api
     * for xml) parser. The final class to show here is
     * GoogleReverseGeocodeXmlHandler. In my example, I only want the name of
     * the city the user is in, so my XmlHandler class I’m about to show only
     * parses that piece of information. If you want to grab more complete
     * information (I’ll also give an example file that contains the XML
     * returned by Google), you’ll have to add more to this class
     *
     * @author Administrator
     *
     */
    public class GoogleReverseGeocodeXmlHandler extends DefaultHandler {
        private boolean inLocalityName = false;
        private boolean finished = false;
        private StringBuilder builder;
        private String localityName;

        public String getLocalityName() {
            return this.localityName;
        }

        @Override
        public void characters(char[] ch, int start, int length)
                throws SAXException {
            super.characters(ch, start, length);
            if (this.inLocalityName && !this.finished) {
                if ((ch[start] != '\n') && (ch[start] != ' ')) {
                    builder.append(ch, start, length);
                }
            }
        }

        @Override
        public void endElement(String uri, String localName, String name)
                throws SAXException {
            super.endElement(uri, localName, name);

            if (!this.finished) {
                if (localName.equalsIgnoreCase("LocalityName")) {
                    this.localityName = builder.toString();
                    this.finished = true;
                }

                if (builder != null) {
                    builder.setLength(0);
                }
            }
        }

        @Override
        public void startDocument() throws SAXException {
            super.startDocument();
            builder = new StringBuilder();
        }

        @Override
        public void startElement(String uri, String localName, String name,
                Attributes attributes) throws SAXException {
            super.startElement(uri, localName, name, attributes);

            if (localName.equalsIgnoreCase("LocalityName")) {
                this.inLocalityName = true;
            }
        }
    }
}

package com.yy; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import android.content.Context; import android.location.Location; import android.location.LocationManager; public class GetCity { /** * 借助Google MAP 通过用户当前经纬度 获得用户当前城市 */ static final String GOOGLE_MAPS_API_KEY = "abcdefg"; private LocationManager locationManager; private Location currentLocation; private String city="全国"; public GetCity(Context context) { this.locationManager = (LocationManager) context .getSystemService(Context.LOCATION_SERVICE); //只是简单的获取城市 不需要实时更新 所以这里先注释 // this.locationManager.requestLocationUpdates( // LocationManager.GPS_PROVIDER, 1000, 0, // new LocationListener() { // public void onLocationChanged(Location loc) { // //当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发 // // Save the latest location // currentLocation = loc; // // Update the latitude & longitude TextViews // System.out // .println("getCity()" // + (loc.getLatitude() + " " + loc // .getLongitude())); // } // // public void onProviderDisabled(String arg0) { // System.out.println(".onProviderDisabled(关闭)"+arg0); // } // // public void onProviderEnabled(String arg0) { // System.out.println(".onProviderEnabled(开启)"+arg0); // } // // public void onStatusChanged(String arg0, int arg1, // Bundle arg2) { // System.out.println(".onStatusChanged(Provider的转态在可用、" + // "暂时不可用和无服务三个状态直接切换时触发此函数)"+ // arg0+" "+arg1+" "+arg2); // } // }); currentLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (currentLocation == null) currentLocation = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); } /** * 开始解析 */ public void start() { if(currentLocation!=null){ new Thread(){ public void run(){ String temp=reverseGeocode(currentLocation); if(temp!=null&&temp.length()>=2) city=temp; } }.start(); }else{ System.out.println("GetCity.start()未获得location"); } } /** * 获得城市 * @return */ public String getCity(){ return city; } /** * 通过Google map api 解析出城市 * @param loc * @return */ public String reverseGeocode(Location loc) { // http://maps.google.com/maps/geo?q=40.714224,-73.961452&output=json&oe=utf8&sensor=true_or_false&key=your_api_key String localityName = ""; HttpURLConnection connection = null; URL serverAddress = null; try { // build the URL using the latitude & longitude you want to lookup // NOTE: I chose XML return format here but you can choose something // else serverAddress = new URL("http://maps.google.com/maps/geo?q=" + Double.toString(loc.getLatitude()) + "," + Double.toString(loc.getLongitude()) + "&output=xml&oe=utf8&sensor=true&key=" + GOOGLE_MAPS_API_KEY); // set up out communications stuff connection = null; // Set up the initial connection connection = (HttpURLConnection) serverAddress.openConnection(); connection.setRequestMethod("GET"); connection.setDoOutput(true); connection.setReadTimeout(10000); connection.connect(); try { InputStreamReader isr = new InputStreamReader(connection .getInputStream()); InputSource source = new InputSource(isr); SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser parser = factory.newSAXParser(); XMLReader xr = parser.getXMLReader(); GoogleReverseGeocodeXmlHandler handler = new GoogleReverseGeocodeXmlHandler(); xr.setContentHandler(handler); xr.parse(source); localityName = handler.getLocalityName(); System.out.println("GetCity.reverseGeocode()"+localityName); } catch (Exception ex) { ex.printStackTrace(); } } catch (Exception ex) { ex.printStackTrace(); System.out.println("GetCity.reverseGeocode()"+ex); } return localityName; } /** * The final piece of this puzzle is parsing the xml that is returned from * google’s service. For this example I am using the java SAX (simple api * for xml) parser. The final class to show here is * GoogleReverseGeocodeXmlHandler. In my example, I only want the name of * the city the user is in, so my XmlHandler class I’m about to show only * parses that piece of information. If you want to grab more complete * information (I’ll also give an example file that contains the XML * returned by Google), you’ll have to add more to this class * * @author Administrator * */ public class GoogleReverseGeocodeXmlHandler extends DefaultHandler { private boolean inLocalityName = false; private boolean finished = false; private StringBuilder builder; private String localityName; public String getLocalityName() { return this.localityName; } @Override public void characters(char[] ch, int start, int length) throws SAXException { super.characters(ch, start, length); if (this.inLocalityName && !this.finished) { if ((ch[start] != '\n') && (ch[start] != ' ')) { builder.append(ch, start, length); } } } @Override public void endElement(String uri, String localName, String name) throws SAXException { super.endElement(uri, localName, name); if (!this.finished) { if (localName.equalsIgnoreCase("LocalityName")) { this.localityName = builder.toString(); this.finished = true; } if (builder != null) { builder.setLength(0); } } } @Override public void startDocument() throws SAXException { super.startDocument(); builder = new StringBuilder(); } @Override public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException { super.startElement(uri, localName, name, attributes); if (localName.equalsIgnoreCase("LocalityName")) { this.inLocalityName = true; } } } }

参考：

http://kryptonum.iteye.com/blog/363950

http://www.cnblogs.com/transmuse/archive/2010/12/31/1923358.html

http://blog.csdn.net/dadoneo/archive/2011/03/18/6259781.aspx

http://www.ispiders.net/?p=325

 http://www.smnirven.com/?p=39#