当前位置未显示

Question

因此，我正在构建一个Android应用，该应用将允许用户打开MapFragment并查看其当前位置。

我在接受权限时遇到了一些问题，导致我解决的应用崩溃，但是当接受权限时，MapFragment当前仅加载地图，但是当前位置未突出显示或放大。我在这里的代码中丢失了什么吗？

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
    setContentView(R.layout.activity_responder_map);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(ResponderMapActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_REQUEST_CODE);
    } else {
        mapFragment.getMapAsync(this);
    }

}


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

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(ResponderMapActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_REQUEST_CODE);
    }
    buildGoogleApiClient();
    mMap.setMyLocationEnabled(true);
}

protected synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    mGoogleApiClient.connect();
}

@Override
public void onLocationChanged(Location location) {
    mLastLocation = location;

    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());

    mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mMap.animateCamera(CameraUpdateFactory.zoomTo(4));
}


@Override
public void onConnected(@Nullable Bundle bundle) {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(1000);
    mLocationRequest.setFastestInterval(1000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(ResponderMapActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_REQUEST_CODE);
    }
    mFusedLocationClient.getLastLocation()
            .addOnSuccessListener(this, new OnSuccessListener<Location>() {
                @Override
                public void onSuccess(Location location) {
                    if (location != null) {
                        // Logic to handle location object
                    }
                }
            });
}