我需要在地图上绘制路径。为此,我考虑了使用Polyline自新的谷歌地图。我的问题是,我的应用程序工作,但它没有绘制在地图上的东西。我希望每次我改变位置时都会画画,基本上是为了画出我的路径。无法根据当前位置在Google地图v2上绘图
public class MapActivity extends FragmentActivity implements LocationListener {
GoogleMap myMap;
Location lastLocation;
private LocationManager locManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map_layout);
myMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
boolean networkEnabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!networkEnabled) {
Toast.makeText(this, "network not enabled", 0);
}
}
@Override
protected void onResume() {
super.onResume();
locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
}
@Override
public void onLocationChanged(Location location) {
if (location != null) {
lastLocation=locManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
Polyline line=myMap.addPolyline(new PolylineOptions().add(new LatLng(location.getLatitude(),location.getLongitude())).color(Color.RED));
}
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
我也面临同样的问题,如果你解决了这个问题,请给我一些建议。谢谢。 –