android maps api v2添加多个圆圈

Question

我正在尝试通过 GPS 的更新每秒向地图添加一个圆圈。我将如何传递位置 location = locationmanager.getLastKnownLocation(provider);每秒做一个新的圈子？这是我目前所拥有的。

public class MainActivity extends Activity implements LocationListener{

Location myLocation;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


GoogleMap mMap;
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();


mMap.setMyLocationEnabled(true);





Location myLocation;

LocationManager locationmanager = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria cr = new Criteria();
String provider = locationmanager.getBestProvider(cr, true);
Location location = locationmanager.getLastKnownLocation(provider);

locationmanager.requestLocationUpdates(provider, 1000, 0, (LocationListener) this);

CircleOptions circleOptions = new CircleOptions()
.center(new LatLng( , ))
.radius(3.048); // In meters

Circle circle = mMap.addCircle(circleOptions);



 }

}

Answer 1

您最好使用LocationListener 的回调：onLocationChange，而不是使用getLastKnownLocation，您似乎已经实现并请求了它。

要将Location 转换为LatLng，请使用：

new LatLng(location.getLatitude(), location.getLongitude())