我无法使用此功能访问我当前的位置。我不知道是什么问题但是。每次我去导航栏上的地图片段时，都看不到我当前的位置。
这是我的代码..
LanlordMapFragment.java
public class LanlordMapFragment extends Fragment implements OnMapReadyCallback {
private GoogleMap mMap;
public LanlordMapFragment() {
// Required empty public constructor
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_lanlord_map, container, false);
return v;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("MAP");
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map1);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("My Location"));
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(true);
return;
}
}
}
答案 0 :(得分：0)
我也经历过这样的问题：
请尝试将这段代码添加到您的公开视图onCreateView（..）{}
MapView m = (MapView) v.findViewById(R.id.source);
m.onCreate(savedInstanceState);
答案 1 :(得分：0)
//试试这段代码
mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(true);
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener()
{
@Override
public void onMapClick(LatLng latLng)
{
}
});
GetCurrentLocation location = new GetCurrentLocation(getActivity(), new GeocodingNotifier<Location>()
{
@Override
public void GeocodingDetails(Location geocodeLatLng) {
if (geocodeLatLng != null) {
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(geocodeLatLng.getLatitude(), geocodeLatLng.getLongitude()), 14f));
}
else {
// shaow erroe message
}
}
});
/// getCurrentLocation类
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
public class GetCurrentLocation implements ConnectionCallbacks,
OnConnectionFailedListener, LocationListener {
private static final String TAG = GetCurrentLocation.class.getSimpleName();
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 1000;
public static Location mLastLocation=null;
public GoogleApiClient mGoogleApiClient;
private boolean mRequestingLocationUpdates = false;
private LocationRequest mLocationRequest;
private GeocodingNotifier mNotifier;
private static int UPDATE_INTERVAL = 10000; // 10 sec
private static int FATEST_INTERVAL = 5000; // 5 sec
private static int DISPLACEMENT = 10; // 10 meters
Activity mContext;
public GetCurrentLocation(Activity mContext, GeocodingNotifier mNotifier) {
this.mContext = mContext;
this.mNotifier = mNotifier;
if (checkPlayServices()) {
// Building the GoogleApi client
buildGoogleApiClient();
createLocationRequest();
}
}
public void setOnResultsListener(GeocodingNotifier mNotifier) {
this.mNotifier = mNotifier;
}
/**
* Method to display the location on UI
*/
private void displayLocation() {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mLastLocation = LocationServices.FusedLocationApi
.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
double latitude = mLastLocation.getLatitude();
double longitude = mLastLocation.getLongitude();
}
}
/**
* Method to toggle periodic location updates
*/
private void togglePeriodicLocationUpdates() {
if (!mRequestingLocationUpdates) {
mRequestingLocationUpdates = true;
// Starting the location updates
startLocationUpdates();
Log.d(TAG, "Periodic location updates started!");
} else {
mRequestingLocationUpdates = false;
// Stopping the location updates
stopLocationUpdates();
Log.d(TAG, "Periodic location updates stopped!");
}
}
/**
* Creating google api client object
*/
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
/**
* Creating location request object
*/
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FATEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
displayLocation();
}
/**
* Method to verify google play services on the device
*/
public boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(mContext);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, mContext,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
Toast.makeText(mContext,
"This device is not supported.", Toast.LENGTH_LONG)
.show();
}
return false;
}
return true;
}
/**
* Starting the location updates
*/
public void startLocationUpdates() {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
/**
* Stopping location updates
*/
public void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
}
/**
* Google api callback methods
*/
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
+ result.getErrorCode());
}
@Override
public void onConnected(Bundle arg0) {
// Once connected with google api, get the location
displayLocation();
startLocationUpdates();
}
@Override
public void onConnectionSuspended(int arg0) {
mGoogleApiClient.connect();
}
@Override
public void onLocationChanged(Location location) {
// Assign the new location
mLastLocation = location;
mNotifier.GeocodingDetails(mLastLocation);
displayLocation();
stopLocationUpdates();
mGoogleApiClient.disconnect();
}
}