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;
    }

补充：移动开发 , Android ,