Android获取所在地城市名2

 

Android获取所在地城市名

分类： Android网络开发2011-12-25 18:30 61人阅读 评论(0) 收藏 举报

<span style="font-size:24px;">public class LocationUtils {

    //public static String cityName = "深圳";  //城市名
    public static String cityName ;  //城市名

    private static Geocoder geocoder;   //此对象能通过经纬度来获取相应的城市等信息

    /**
     * 通过地理坐标获取城市名  其中CN分别是city和name的首字母缩写
     * @param context
     */
    public static void getCNBylocation(Context context){

        geocoder = new Geocoder(context);
        //用于获取Location对象，以及其他
        LocationManager locationManager;
        String serviceName = Context.LOCATION_SERVICE;
        //实例化一个LocationManager对象
        locationManager = (LocationManager)context.getSystemService(serviceName);
        //provider的类型
        String provider = LocationManager.NETWORK_PROVIDER;

        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_FINE);   //高精度
        criteria.setAltitudeRequired(false);    //不要求海拔
        criteria.setBearingRequired(false); //不要求方位
        criteria.setCostAllowed(false); //不允许有话费
        criteria.setPowerRequirement(Criteria.POWER_LOW);   //低功耗

        //通过最后一次的地理位置来获得Location对象
        Location location = locationManager.getLastKnownLocation(provider);

        String queryed_name = updateWithNewLocation(location);
        if((queryed_name != null) && (0 != queryed_name.length())){

            cityName = queryed_name;
        }

        /*
         * 第二个参数表示更新的周期，单位为毫秒；第三个参数的含义表示最小距离间隔，单位是米
         * 设定每30秒进行一次自动定位
         */
        locationManager.requestLocationUpdates(provider, 30000, 50,
                locationListener);
        //移除监听器，在只有一个widget的时候，这个还是适用的
        locationManager.removeUpdates(locationListener);
    }

    /**
     * 方位改变时触发，进行调用
     */
    private final static LocationListener locationListener = new LocationListener() {
        String tempCityName;
        public void onLocationChanged(Location location) {

            tempCityName = updateWithNewLocation(location);
            if((tempCityName != null) && (tempCityName.length() != 0)){

                cityName = tempCityName;
            }
        }

        public void onProviderDisabled(String provider) {
            tempCityName = updateWithNewLocation(null);
            if ((tempCityName != null) && (tempCityName.length() != 0)) {

                cityName = tempCityName;
            }
        }

        public void onProviderEnabled(String provider) {
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {
        }
    };

    /**
     * 更新location
     * @param location
     * @return cityName
     */
    private static String updateWithNewLocation(Location location) {
        String mcityName = "";
        double lat = 0;
        double lng = 0;
        List<Address> addList = null;
        if (location != null) {
            lat = location.getLatitude();
            lng = location.getLongitude();
        } else {

            System.out.println("无法获取地理信息");
        }

        try {

            addList = geocoder.getFromLocation(lat, lng, 1);    //解析经纬度

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if (addList != null && addList.size() > 0) {
            for (int i = 0; i < addList.size(); i++) {
                Address add = addList.get(i);
                mcityName += add.getLocality();
            }
        }
        if(mcityName.length()!=0){

            return mcityName.substring(0, (mcityName.length()-1));
        } else {
            return mcityName;
        }
    }

    /**
     * 通过经纬度获取地址信息的另一种方法
     * @param latitude
     * @param longitude
     * @return 城市名
     */
    public static String GetAddr(String latitude, String longitude) {
        String addr = "";

        /*
         * 也可以是http://maps.google.cn/maps/geo?output=csv&key=abcdef&q=%s,%s，不过解析出来的是英文地址
         * 密钥可以随便写一个key=abc
         * output=csv,也可以是xml或json，不过使用csv返回的数据最简洁方便解析
         */
        String url = String.format(
            "http://ditu.google.cn/maps/geo?output=csv&key=abcdef&q=%s,%s",
            latitude, longitude);
        URL myURL = null;
        URLConnection httpsConn = null;
        try {

            myURL = new URL(url);
        } catch (MalformedURLException e) {
          e.printStackTrace();
          return null;
        }

        try {

            httpsConn = (URLConnection) myURL.openConnection();

            if (httpsConn != null) {
                InputStreamReader insr = new InputStreamReader(
                        httpsConn.getInputStream(), "UTF-8");
                BufferedReader br = new BufferedReader(insr);
                String data = null;
                if ((data = br.readLine()) != null) {
                    String[] retList = data.split(",");
                    if (retList.length > 2 && ("200".equals(retList[0]))) {
                        addr = retList[2];
                    } else {
                        addr = "";
                    }
                }
                insr.close();
            }
        } catch (IOException e) {

            e.printStackTrace();
           return null;
        }
           return addr;
    }

}  </span>

 

 

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />