小编Ric*_*hez的帖子

我刚刚在通过访问纬度和经度来显示地图时遇到问题SqliteDatabase。

当我运行这个时，我收到上面的错误.target(new LatLng(latitude, longitude))。任何帮助，将不胜感激。

 import android.content.Intent;
    import android.os.Bundle;
    import android.support.v4.app.FragmentActivity;
    import android.support.v4.app.FragmentManager;
    import android.support.v7.app.ActionBarActivity;
    import android.support.v7.app.AppCompatActivity;

    import com.google.android.gms.maps.CameraUpdateFactory;
    import com.google.android.gms.maps.GoogleMap;
    import com.google.android.gms.maps.OnMapReadyCallback;
    import com.google.android.gms.maps.SupportMapFragment;
    import com.google.android.gms.maps.model.BitmapDescriptorFactory;
    import com.google.android.gms.maps.model.CameraPosition;
    import com.google.android.gms.maps.model.LatLng;
    import com.google.android.gms.maps.model.MarkerOptions;

    import static com.example.kod45.refapp.R.id.lat;
    import static com.example.kod45.refapp.R.id.longitude;

    public class Map extends FragmentActivity implements OnMapReadyCallback {
        Double latitude;
        Double longitude;
        private GoogleMap mMap;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_map);
            // Obtain the SupportMapFragment and get notified when the map is ready to be used. …