我正在尝试显示我的当前位置，但是我遇到了这个问题。我不知道哪一部分是错误，我放入Common.mLastLocation和ACCESS_COARSE_LOCATION。请问你能帮帮我吗。我的位置返回NULL，最近我更改了库“ com.google.android.gms：play-services-maps：11.8.0”。我的logcat是：尝试调用虚拟方法'double android.location.Location.getLatitude（）
第一部分：
public class Home_rider extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener ,
OnMapReadyCallback{
SupportMapFragment mapFragment;
FusedLocationProviderClient fusedLocationProviderClient;
LocationCallback locationCallback;
//Location
private GoogleMap mMap;
private static final int MY_PERMISSION_REQUEST_CODE = 7192; // MY Birthday
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 300193; // MY CODE
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private static int UPDATE_INTERVAL = 5000; // 5 secs
private static int FATEST_INTERVAL = 3000;
private static int DISPLACEMENT = 10;
DatabaseReference ref;
GeoFire geoFire;
Marker mUserMarker,markerDestination;
boolean isDriverFound=false;
String driverId="";
int radius = 1; //1km
int distance = 1; //3km
private static final int LIMIT = 3;
//BottomSheet
ImageView imgExpandable;
BottomSheetRiderFragment mBottomSheet;
Button btnPickupRequest;
//Presense system
DatabaseReference driversAvailable;
//Send Alert
IFCMService mService;
PlaceAutocompleteFragment place_location,place_destination;
String mPlaceLocation,mPlaceDestination;
//New Update Information
CircleImageView imageAvatar;
TextView txtRiderName,txtStars;
//Declare FireStorage to upload avatar
FirebaseStorage storage;
StorageReference storageReference;
Get location:
private void setUpLocation() {
//Copy code from Driver APP
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
//Request runtime permission
ActivityCompat.requestPermissions(this, new String[]{
Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION
},MY_PERMISSION_REQUEST_CODE);
}
else
{
buildLocationCallBack();
createLocationRequest();
displayLocation();
}
}
private void displayLocation() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
return;
}
fusedLocationProviderClient.getLastLocation().addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
Common.mLastLocation = location;
if (Common.mLastLocation != null)
{
//Create LatLng from mLastLocation and this is center point
LatLng center = new LatLng(Common.mLastLocation.getLatitude(),Common.mLastLocation.getLongitude());
//Distance in meters
//Heading 0 is northside , 90 is east, 180 is south and 270 is west
//Base compat
LatLng northSide = SphericalUtil.computeOffset(center,100000,0);
LatLng southSide = SphericalUtil.computeOffset(center,100000,180);
LatLngBounds bounds = LatLngBounds.builder()
.include(northSide)
.include(southSide)
.build();
place_location.setBoundsBias(bounds);
place_destination.setBoundsBias(bounds);
//Presense System
driversAvailable = FirebaseDatabase.getInstance().getReference(Common.driver_tbl);
driversAvailable.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
//If have any change from Drivers table , we will reload all drivers available
loadAllAvailableDriver(new LatLng(Common.mLastLocation.getLatitude(),Common.mLastLocation.getLongitude()));
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
final double latitude = Common.mLastLocation.getLatitude();
final double longitude = Common.mLastLocation.getLongitude();
loadAllAvailableDriver(new LatLng(Common.mLastLocation.getLatitude(),Common.mLastLocation.getLongitude()));
Log.d("MoaguiTaxi",String.format("No se pudo encontrar su ubicación : %f / %f", latitude, longitude));
}
else
{
Log.d("MoaguiTaxi","No se pudo encontrar su ubicación");
}
}
});
}
private void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FATEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
}
@Override
public void onMapReady(GoogleMap googleMap) {
try {
boolean isSucces = googleMap.setMapStyle(
MapStyleOptions.loadRawResourceStyle(this,R.raw.my_map_style)
);
if (!isSucces)
Log.e("ERROR","No se cargó el mapa");
}
catch (Resources.NotFoundException ex)
{
ex.printStackTrace();
}
mMap = googleMap;
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setZoomGesturesEnabled(true);
mMap.setInfoWindowAdapter(new CustomInfoWindow(this));
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
//First , check markerDestination
//If is not null , just remove available marker
if (markerDestination != null)
markerDestination.remove();
markerDestination = mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.destination_marker))
.position(latLng)
.title("Destination"));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,15.0f));
//Show bottom sheet
BottomSheetRiderFragment mBottomSheet = BottomSheetRiderFragment.newInstance(String.format("%f,%f",mLastLocation.getLatitude(),mLastLocation.getLongitude()),
String.format("%f,%f",latLng.latitude,latLng.longitude)
,true);
mBottomSheet.show(getSupportFragmentManager(),mBottomSheet.getTag());
}
});
//Copy code from Driver APP
if (ActivityCompat.checkSelfPermission(Home_rider.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(Home_rider.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
return;
}
buildLocationCallBack();
fusedLocationProviderClient.requestLocationUpdates(mLocationRequest,locationCallback, Looper.myLooper());
}
}
最佳答案
这是因为您在mLastLocation.getLatitude()中使用的是Common.mLastLocation.getLatitude()而不是setOnMapClickListener。
错误基本上是在空引用上调用getLatitude()。