Java-Mapbox Android：如何获取从当前位置到您选择的目的地的路线？
作者：互联网
好的,所以我对Mapbox还是很陌生,在此之前我曾经使用过GMaps,但是我发现Mapbox能够满足我的需要,但问题是我碰壁了.
我已经在其网站上使用了示例的组合,例如
https://www.mapbox.com/android-sdk/examples/geocoding和
https://www.mapbox.com/android-sdk/examples/directions
我试图让用户搜索目的地,然后将其转换为坐标,以用于在地图上进行绘制.然后,我想画一条从他们当前位置到目的地的路线,这就是我的问题所在.
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(MapboxMap mapboxMap) {
map = mapboxMap;
// Set the origin waypoint to the devices location
Position origin = Position.fromCoordinates(mapboxMap.getMyLocation().getLongitude(), mapboxMap.getMyLocation().getLatitude());
// Set the destination waypoint to the location point long clicked by the user
final Position destination = updateMap(feature.getLongitude(), feature.getLatitude());
mapboxMap.addMarker(new MarkerOptions()
.position(new LatLng(origin.getLatitude(), origin.getLongitude()))
.title("Origin")
.snippet("Alhambra"));
mapboxMap.addMarker(new MarkerOptions()
.position(new LatLng(latitude, destination.getLongitude()))
.title("Destination")
.snippet("Plaza del Triunfo"));
// Get route from API
try {
getRoute(origin, destination);
} catch (ServicesException e) {
e.printStackTrace();
}
}
});
AndroidGeocoder geocoder = new AndroidGeocoder(context, Locale.getDefault());
geocoder.setAccessToken(MAPBOX_ACCESS_TOKEN);
addresses = geocoder.getFromLocation(
location.getLatitude(),
location.getLongitude(),
1);
// Set up autocomplete widget
GeocoderAutoCompleteView autocomplete = (GeocoderAutoCompleteView) findViewById(R.id.query);
autocomplete.setAccessToken("pk.eyJ1IjoiYmV1dHJveCIsImEiOiJjaW5ybzlwYnQwMGlqdnhtMno3cmtwNTlqIn0.y16mZzmertL4-eEfQNGeqQ");
autocomplete.setType(GeocodingCriteria.TYPE_POI);
autocomplete.setOnFeatureListener(new GeocoderAutoCompleteView.OnFeatureListener() {
@Override
public void OnFeatureClick(GeocodingFeature feature) {
Position position = feature.asPosition();
updateMap(position.getLatitude(), position.getLongitude());
}
});
}
private void getRoute(Position origin, Position destination) throws ServicesException {
MapboxDirections client = new MapboxDirections.Builder()
.setOrigin(origin)
.setDestination(destination)
.setProfile(DirectionsCriteria.PROFILE_CYCLING)
.setAccessToken("pk.eyJ1IjoiYmV1dHJveCIsImEiOiJjaW5ybzlwYnQwMGlqdnhtMno3cmtwNTlqIn0.y16mZzmertL4-eEfQNGeqQ")
.build();
client.enqueueCall(new Callback<DirectionsResponse>() {
@Override
public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
// You can get the generic HTTP info about the response
Log.d(TAG, "Response code: " + response.code());
if (response.body() == null) {
Log.e(TAG, "No routes found, make sure you set the right user and access token.");
return;
}
// Display some info about the route
currentRoute = response.body().getRoutes().get(0);
Log.d(TAG, "Distance: " + currentRoute.getDistance());
Toast.makeText(MainActivity.this, "Route is " + currentRoute.getDistance() + " meters long.", Toast.LENGTH_SHORT).show();
// Draw the route on the map
drawRoute(currentRoute);
}
@Override
public void onFailure(Call<DirectionsResponse> call, Throwable t) {
Log.e(TAG, "Error: " + t.getMessage());
Toast.makeText(MainActivity.this, "Error: " + t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
private void drawRoute(DirectionsRoute route) {
// Convert LineString coordinates into LatLng[]
LineString lineString = LineString.fromPolyline(route.getGeometry(), Constants.OSRM_PRECISION_V5);
List<Position> coordinates = lineString.getCoordinates();
LatLng[] points = new LatLng[coordinates.size()];
for (int i = 0; i < coordinates.size(); i++) {
points[i] = new LatLng(
coordinates.get(i).getLatitude(),
coordinates.get(i).getLongitude());
}
// Draw Points on MapView
map.addPolyline(new PolylineOptions()
.add(points)
.color(Color.parseColor("#009688"))
.width(5));
}
private void myLocation() {
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;
}
mapView.setMyLocationEnabled(true);
mapView.setMyLocationTrackingMode(MyLocationTracking.TRACKING_FOLLOW);
mapView.getMyLocation();
}
因此,这是我的问题,我无法在网上找到太多有关Mapbox的信息,因为它们的新SDK与以前的版本有很大不同,主要是因为MapView和MapboxMap现在已分开(这仍然让我感到困惑).
任何帮助将不胜感激：D
：Edit：我主要是在设置目的地方面苦苦挣扎,因此,我当前的很多变量都混在一起了.如果您需要解释,我会很高兴.
解决方法:
您的代码中存在一些错误,最大的错误是,当您可以改用MapboxMap时,仍在使用MapView获取位置信息.这里有一些粗糙的代码可以满足您的要求.它不会像您应有的那样检查用户权限,但会向您显示如何执行Mapbox的操作.
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import com.mapbox.mapboxsdk.annotations.MarkerOptions;
import com.mapbox.mapboxsdk.annotations.PolylineOptions;
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.services.Constants;
import com.mapbox.services.android.geocoder.ui.GeocoderAutoCompleteView;
import com.mapbox.services.commons.ServicesException;
import com.mapbox.services.commons.geojson.LineString;
import com.mapbox.services.commons.models.Position;
import com.mapbox.services.directions.v5.DirectionsCriteria;
import com.mapbox.services.directions.v5.MapboxDirections;
import com.mapbox.services.directions.v5.models.DirectionsResponse;
import com.mapbox.services.directions.v5.models.DirectionsRoute;
import com.mapbox.services.geocoding.v5.GeocodingCriteria;
import com.mapbox.services.geocoding.v5.models.GeocodingFeature;
import java.util.List;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class MainActivity extends Activity {
private final static String TAG = "MainActivity";
private MapView mapView;
private MapboxMap map;
private DirectionsRoute currentRoute;
private Position origin;
private Position destination;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Setup the MapView
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(MapboxMap mapboxMap) {
map = mapboxMap;
mapboxMap.setMyLocationEnabled(true);
// Set up autocomplete widget
GeocoderAutoCompleteView autocomplete = (GeocoderAutoCompleteView) findViewById(R.id.query);
autocomplete.setAccessToken("<your access token>");
autocomplete.setType(GeocodingCriteria.TYPE_POI);
autocomplete.setOnFeatureListener(new GeocoderAutoCompleteView.OnFeatureListener() {
@Override
public void OnFeatureClick(GeocodingFeature feature) {
if(map.getMyLocation() != null) {
// Set the origin as user location only if we can get their location
origin = Position.fromCoordinates(map.getMyLocation().getLongitude(), map.getMyLocation().getLatitude());
}else{
return;
}
destination = feature.asPosition();
// Add origin and destination to the map
map.addMarker(new MarkerOptions()
.position(new LatLng(origin.getLatitude(), origin.getLongitude())));
map.addMarker(new MarkerOptions()
.position(new LatLng(destination.getLatitude(), destination.getLongitude())));
// Get route from API
try {
getRoute(origin, destination);
} catch (ServicesException e) {
e.printStackTrace();
}
}
});
}
});
}
private void getRoute(Position origin, Position destination) throws ServicesException {
MapboxDirections client = new MapboxDirections.Builder()
.setOrigin(origin)
.setDestination(destination)
.setProfile(DirectionsCriteria.PROFILE_CYCLING)
.setAccessToken("<your access token>")
.build();
client.enqueueCall(new Callback<DirectionsResponse>() {
@Override
public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
// You can get the generic HTTP info about the response
Log.d(TAG, "Response code: " + response.code());
if (response.body() == null) {
Log.e(TAG, "No routes found, make sure you set the right user and access token.");
return;
}
// Print some info about the route
currentRoute = response.body().getRoutes().get(0);
Log.d(TAG, "Distance: " + currentRoute.getDistance());
Toast.makeText(MainActivity.this, "Route is " + currentRoute.getDistance() + " meters long.", Toast.LENGTH_SHORT).show();
// Draw the route on the map
drawRoute(currentRoute);
}
@Override
public void onFailure(Call<DirectionsResponse> call, Throwable t) {
Log.e(TAG, "Error: " + t.getMessage());
Toast.makeText(MainActivity.this, "Error: " + t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
private void drawRoute(DirectionsRoute route) {
// Convert LineString coordinates into LatLng[]
LineString lineString = LineString.fromPolyline(route.getGeometry(), Constants.OSRM_PRECISION_V5);
List<Position> coordinates = lineString.getCoordinates();
LatLng[] points = new LatLng[coordinates.size()];
for (int i = 0; i < coordinates.size(); i++) {
points[i] = new LatLng(
coordinates.get(i).getLatitude(),
coordinates.get(i).getLongitude());
}
// Draw Points on MapView
map.addPolyline(new PolylineOptions()
.add(points)
.color(Color.parseColor("#009688"))
.width(5));
}
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
希望这可以帮助！
标签：directions,mapbox,android,java,dictionary 来源： https://codeday.me/bug/20191009/1882072.html