No error until last week
It was google api, but when I looked before, there were a lot of errors in the code.
I can't find any helpful information after investigating the solution.
Also, while developing with several people
Only mine is out. I wonder if the environment is different from other people
Cannot be considered.

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.UiSettings;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.TileOverlay;
import com.google.android.gms.maps.model.TileOverlayOptions;
import com.google.android.gms.maps.model.TileProvider;
import com.google.android.gms.maps.model.UrlTileProvider;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener {

All of this is an error.
Cannot import, implements OnMapReadyCallback is not possible.
How can I solve it? . .
It was done normally until the week before.