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;
}
}
<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" />