Android得到地理位置并分析出具体城市

Java代码 

/**

     * 通过GPS得到城市名

     * 

     * @param context

     *            一個Activity

     * @return 城市名

     */ 

    public static String getCityName(Context context) { 

        LocationManager locationManager; 

        String contextString = Context.LOCATION_SERVICE; 

        locationManager = (LocationManager) context.getSystemService(contextString); 

        Criteria criteria = new Criteria(); 

        criteria.setAccuracy(Criteria.ACCURACY_FINE); 

        criteria.setAltitudeRequired(false); 

        criteria.setBearingRequired(false); 

        criteria.setCostAllowed(false); 

        criteria.setPowerRequirement(Criteria.POWER_LOW); 

        String cityName = null; 

        // 取得效果最好的criteria 

        String provider = locationManager.getBestProvider(criteria, true); 

        if (provider == null) { 

            return null; 

        } 

        // 得到坐标相关的信息 

        Location location = locationManager.getLastKnownLocation(provider); 

        if (location == null) { 

            return null; 

        } 

 

        if (location != null) { 

            double latitude = location.getLatitude(); 

            double longitude = location.getLongitude(); 

            // 更具地理环境来确定编码 

            Geocoder gc = new Geocoder(context, Locale.getDefault()); 

            try { 

                // 取得地址相关的一些信息\经度、纬度 

                List<Address> addresses = gc.getFromLocation(latitude, longitude, 1); 

                StringBuilder sb = new StringBuilder(); 

                if (addresses.size() > 0) { 

                    Address address = addresses.get(0); 

                    sb.append(address.getLocality()).append("\n"); 

                    cityName = sb.toString(); 

                } 

            } catch (IOException e) { 

            } 

        } 

        return cityName; 

    }