地图显示的默认标记，但它永远不会设置

Question

map with default marker that is never set

在地图的中间有一个标志，它总是在这个位置所示，当我开始用它的地图片段的活性。但我从来没有设置这个标记......有人知道这是为什么，也许我怎么可以删除这个标记？

这里是我的代码：

@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 

    int permissionCheck = ContextCompat.checkSelfPermission(MapsActivity.this, 
      android.Manifest.permission.ACCESS_FINE_LOCATION); 

    if(permissionCheck == PackageManager.PERMISSION_GRANTED){ 
     getCurrentLocation(); 
     onSearch(); 
    }else if(permissionCheck == PackageManager.PERMISSION_DENIED){ 
     onSearch(); 
    } 
} 
//gets current location of the user. 
public void getCurrentLocation() { 
    double lat = 0; 
    double lng = 0; 
    try { 
     mMap.setMyLocationEnabled(true); //allows query of current location. 
    }catch(SecurityException e){ 
     e.printStackTrace(); 
    } 

    LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
    Geocoder geocoderGetAddress = new Geocoder(MapsActivity.this); 
    try{ 
     Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
     if(location!=null) { 
      lat = location.getLatitude(); 
      lng = location.getLongitude(); 
     } 
    }catch(SecurityException e){ 
     e.printStackTrace(); 
    } 
    //the rest of this method gets the address from the geocoder, so that it can be displayed as a String on the marker info window. 
    String displayAddress =""; 
    try { 
     List<Address> currAddress = geocoderGetAddress.getFromLocation(lat, lng, 1); 
     if(currAddress.size() >0){ 
      for(int i=0; i<currAddress.get(0).getMaxAddressLineIndex();i++){ 
       displayAddress += currAddress.get(0).getAddressLine(i) +"\n"; 
      } 
     } 
    }catch (IOException e){ 
     e.printStackTrace(); 
    } 
    mMap.addMarker(new MarkerOptions().position(new LatLng(lat,lng)).title(myLoc).snippet(displayAddress)); 
    LatLng myLatLng = new LatLng(lat, lng); 
    mMap.animateCamera(CameraUpdateFactory.newLatLng(myLatLng)); 
    initAcceptButton(); 
} 

谢谢！

Answer 1

我只是解决了这个问题，将

if(lat!= 0 || lng != 0){ 
//add marker here 
}