关于android:位置服务与地图应用-Andorid开发期末复习1

让程序提供位置服务-> 如何获取LocationManager?

通过调用android.app.Activity.getSystemService()函数

String serviceString = Context.LOCATION_SERVICE;
LocationManager locationManager =(LocationManager)getSystemService(serviceString);

获取LocationManager后指定其定位办法

String provider = LocationManager.GPS_PROVIDER;
Location location = locationManager.getLastKnownLocation(provider);

调用location中的办法

double lat = location.getLatitude();
double lng = location.getLongitude();

监督地位变动

//参数阐明：
//provider:定位办法
//2000:残剩地位扭转事件的工夫距离
//0:间隔条件
//locationListener:回调函数
locationManager.requestLocationUpdates(provider, 2000, 0, locationListener);

//locationListener的实现
private final LocationListener locationListener = new LocationListener(){

     @Override
     public void onLocationChanged(Location location) {
         getLocationInfo(location);
     }

     @Override
     public void onProviderDisabled(String provider) {
         getLocationInfo(null);
     }

     @Override
     public void onProviderEnabled(String provider) {
         getLocationInfo(null);
     }

     @Override
     public void onStatusChanged(String provider, int status, Bundle extras) {

     }

最初要使GPS定位失效须要在AndroidManifest.xml退出用户许可

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