因为我在我的应用程序中使用MAPBOX。我不知道如何获取当前lat和long。我用这种方式获取当前位置。但它显示空对象引用。请帮我解决我的问题< / p>
mapView = (MapView)view. findViewById(R.id.mapView);
mapView.setStyleUrl(Style.MAPBOX_STREETS);
mapView.onCreate(savedInstanceState);
//Add a mapBoxMap
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(MapboxMap mapboxMap) {
mapboxMap.setMyLocationEnabled(true);
// Set the origin waypoint to the devices location
Position origin = Position.fromCoordinates(mapboxMap.getMyLocation().getLongitude(), mapboxMap.getMyLocation().getLatitude());
Log.i("RR","mapboxMap.getMyLocation();"+origin);
// Log.i("RR","mapboxMap.getMyLocation();"+mapboxMap.getMyLocation().getLongitude());
mapboxMap.getUiSettings().setZoomControlsEnabled(true);
mapboxMap.getUiSettings().setZoomGesturesEnabled(true);
mapboxMap.getUiSettings().setScrollGesturesEnabled(true);
mapboxMap.getUiSettings().setAllGesturesEnabled(true);
}
});
答案 0 :(得分:4)
mapboxMap.setMyLocationEnabled(true);
已deprecated
。
你需要使用locationEngine
来获得lat和long这样的
locationEngine = new LostLocationEngine(MainActivity.this);
locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
locationEngine.setInterval(5000);
locationEngine.activate();
Location lastLocation = locationEngine.getLastLocation();
使用lastLocation.getLatitude()
,lastLocation.getLongitude()
答案 1 :(得分:3)
经过1天的搜索,我得到了结果 这是MapBox用户当前位置获取的完整代码。 MainActivity:
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.pm.PackageManager;
import android.location.Location;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.mapbox.android.core.location.LocationEngine;
import com.mapbox.android.core.location.LocationEngineListener;
import com.mapbox.android.core.location.LocationEnginePriority;
import com.mapbox.android.core.location.LocationEngineProvider;
import com.mapbox.android.core.permissions.PermissionsListener;
import com.mapbox.android.core.permissions.PermissionsManager;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.plugins.locationlayer.LocationLayerPlugin;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.CameraMode;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.RenderMode;
import java.util.List;
public class Main2Activity extends AppCompatActivity implements OnMapReadyCallback, LocationEngineListener, PermissionsListener {
private MapView mapView;
private MapboxMap map;
LocationEngine locationEngine;
LocationLayerPlugin locationLayerPlugin;
PermissionsManager permissionsManager;
Location originLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Mapbox.getInstance(this, "YOUR_MAPBOX_KEY");
setContentView(R.layout.activity_main2);
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(MapboxMap mapboxMap) {
/* LocationPluginActivity.this.map = map;
enableLocationPlugin();*/
map = mapboxMap;
locationEnable();
mapboxMap.getUiSettings().setZoomControlsEnabled(true);
mapboxMap.getUiSettings().setZoomGesturesEnabled(true);
mapboxMap.getUiSettings().setScrollGesturesEnabled(true);
mapboxMap.getUiSettings().setAllGesturesEnabled(true);
}
void locationEnable() {
if (PermissionsManager.areLocationPermissionsGranted(this)) {
intialLocationEngine();
intializLocationLayer();
} else {
permissionsManager = new PermissionsManager(this);
permissionsManager.requestLocationPermissions(this);
}
}
void intialLocationEngine() {
locationEngine = new LocationEngineProvider(this).obtainBestLocationEngineAvailable();
locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
locationEngine.activate();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// 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;
}
Location lastLocation = locationEngine.getLastLocation();
if (lastLocation != null) {
originLayout = lastLocation;
setCamerpostion(lastLocation);
} else {
locationEngine.addLocationEngineListener(this);
}
}
void intializLocationLayer() {
locationLayerPlugin = new LocationLayerPlugin(mapView, map, locationEngine);
locationLayerPlugin.setLocationLayerEnabled(true);
locationLayerPlugin.setCameraMode(CameraMode.TRACKING);
locationLayerPlugin.setRenderMode(RenderMode.NORMAL);
}
void setCamerpostion(Location camerpostion) {
map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(camerpostion.getLatitude(), camerpostion.getLongitude()), 13.0));
}
@Override
public void onConnected() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
locationEngine.requestLocationUpdates();
}
@Override
public void onLocationChanged(Location location) {
if (location != null) {
originLayout = location;
setCamerpostion(location);
}
}
@Override
public void onExplanationNeeded(List<String> permissionsToExplain) {
}
@Override
public void onPermissionResult(boolean granted) {
if (granted) {
locationEnable();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
permissionsManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
@SuppressWarnings("MissingPermission")
@Override
public void onStart() {
super.onStart();
if (locationEngine != null)
locationEngine.requestLocationUpdates();
mapView.onStart();
}
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onStop() {
super.onStop();
mapView.onStop();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (locationEngine!=null)
{
locationEngine.deactivate();
} mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}
这是Xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.joltatech.selfmadmap.Main2Activity">
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:mapbox_cameraTargetLat="40.73581"
app:mapbox_cameraTargetLng="-73.99155"
app:mapbox_styleUrl="@string/mapbox_style_satellite_streets"
app:mapbox_cameraZoom="11"/>
</RelativeLayout>
这是Gradle文件:
implementation 'com.mapbox.mapboxsdk:mapbox-android-sdk:6.3.0'
implementation 'com.mapbox.mapboxsdk:mapbox-android-plugin-locationlayer:0.6.0'
并在项目级别Gradle中使用:
jcenter()
mavenCentral()
答案 2 :(得分:1)
mapboxMap.getLocationComponent()。getLastKnownLocation()。getLatitude()
答案 3 :(得分:0)
对于获得用户的初始位置来说,这是最好的一种代码,对我有用
protected void getLocation() {
if (isLocationEnabled(MainActivity.this)) {
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
criteria = new Criteria();
bestProvider = String.valueOf(locationManager.getBestProvider(criteria, true)).toString();
//You can still do this if you like, you might get lucky:
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// 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;
}
Location location = locationManager.getLastKnownLocation(bestProvider);
if (location != null) {
Log.e("TAG", "GPS is on");
latitude = location.getLatitude();
longitude = location.getLongitude();
originLocation=location;
Toast.makeText(MainActivity.this, "latitude:" + latitude + " longitude:" + longitude, Toast.LENGTH_SHORT).show();
searchNearestPlace(voice2text);
}
else{
//This is what you need:
locationManager.requestLocationUpdates(bestProvider, 1000, 0, (android.location.LocationListener) MainActivity.this);
}
}
else
{
//prompt user to enable location....
//.................
}
}