关于android:位置服务与地图应用-Andorid开发期末复习1

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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) {}