问题
i am developing an app for my final year exam in android studio and i don't know how to show user location on MapFragment.
I've already do this but inside an activity, i need it inside the MapFragment.
This is my MapFragment:
public class MapFragment extends Fragment implements OnMapReadyCallback {
GoogleMap mMap;
MapView mMapView;
View mView;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
mView = inflater.inflate(R.layout.fragment_map, null);
return mView;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mMapView = (MapView) mView.findViewById(R.id.map);
if (mMapView != null) {
mMapView.onCreate(null);
mMapView.onResume();
mMapView.getMapAsync(this);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
MapsInitializer.initialize(getContext());
mMap = googleMap;
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
}
In AndroidManifest i've requested the needed permissions:
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
回答1:
just add this
@Override
public void onMapReady(GoogleMap googleMap) {
MapsInitializer.initialize(getActivity());
mMap = googleMap;
mMap.setMyLocationEnabled(true);
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
}
to get current location on map.
回答2:
Please try this:
In Gradle:
implementation 'gun0912.ted:tedpermission:2.1.0'
implementation 'com.google.android.gms:play-services:12.0.1'
In Fragment:
public class Home extends Fragment implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener, OnMapReadyCallback {
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private Location locationData;
private static final long TIME_INTERVAL_GET_LOCATION = 1000 * 5; // 1 Minute
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 5000;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, null);
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
TedPermission.with(getActivity())
.setPermissionListener(permissionlistener)
.setDeniedMessage("If you reject permission,you can not use this service\n\nPlease turn on permissions at [Setting] > [Permission]")
.setPermissions(Manifest.permission.ACCESS_FINE_LOCATION)
.check();
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
return rootView;
}
@Override
public void onResume() {
super.onResume();
}
PermissionListener permissionlistener = new PermissionListener() {
@Override
public void onPermissionGranted() {
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(TIME_INTERVAL_GET_LOCATION) // 3 seconds, in milliseconds
.setFastestInterval(TIME_INTERVAL_GET_LOCATION); // 1 second, in milliseconds
if (!mGoogleApiClient.isConnected()) {
mGoogleApiClient.connect();
locationChecker(mGoogleApiClient, getActivity());
}
}
@Override
public void onPermissionDenied(ArrayList<String> deniedPermissions) {
}
};
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
FusedLocationProviderClient mFusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());
mFusedLocationClient.requestLocationUpdates(mLocationRequest, new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
locationData = locationResult.getLastLocation();
Toast.makeText(getActivity(), "Latitude: " + locationData.getLatitude() + ", Longitude: " + locationData.getLongitude(), Toast.LENGTH_SHORT).show();
Log.w("==>UpdateLocation<==", "" + String.format("%.6f", locationData.getLatitude()) + "," + String.format("%.6f", locationData.getLongitude()));
if (locationData != null) {
LatLng point = new LatLng(locationData.getLatitude(), locationData.getLongitude());
mMap.clear();
Marker marker = mMap.addMarker(new MarkerOptions().position(point).title("Your Current Location"));
//marker.showInfoWindow();
CameraPosition cameraPosition = new CameraPosition.Builder().target(point).zoom(16).build();
mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
}
}, null);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
if (connectionResult.hasResolution() && getActivity() instanceof Activity) {
try {
Activity activity = (Activity) getActivity();
connectionResult.startResolutionForResult(activity, CONNECTION_FAILURE_RESOLUTION_REQUEST);
} catch (Exception e) {
e.printStackTrace();
}
} else {
Log.i("", "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
public void locationChecker(GoogleApiClient mGoogleApiClient, final Activity activity) {
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
builder.setAlwaysShow(true);
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(activity, 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
@Override
public void onLocationChanged(Location location) {
//Log.w("==>UpdateLocation<==", "" + String.format("%.6f", location.getLatitude()) + "," + String.format("%.6f", location.getLongitude()));
//locationData = location;
//Toast.makeText(getActivity(), "Latitude: " + locationData.getLatitude() + ", Longitude: " + locationData.getLongitude(), Toast.LENGTH_SHORT).show();
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.getUiSettings().setZoomControlsEnabled(false);
mMap.setBuildingsEnabled(false);
mMap.getUiSettings().setCompassEnabled(true);
//mMap.getUiSettings().setAllGesturesEnabled(false);
mMap.getUiSettings().setCompassEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.setIndoorEnabled(false);
mMap.getUiSettings().setRotateGesturesEnabled(true);
}
}
In Xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#E9EFF7"
android:orientation="vertical">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
In AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<permission
android:name="your_packagename.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="your_packagename.permission.MAPS_RECEIVE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
...
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_your_key"/>
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
来源：https://stackoverflow.com/questions/55933929/android-display-user-location-on-map-fragment