如何在Android中的google maps api中找到多个位置的最佳路径？我有一些位置作为LatLng但我不知道如何指定最佳路线
答案 0 :(得分：0)
ArrayList<LatLng> directionPoint = latLongList;
PolylineOptions rectLine = new PolylineOptions().width(8).color(
Color.RED);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
// Adding route on the map
map.addPolyline(rectLine);
试试这个，在latLongList中传递你的latlongs列表
答案 1 :(得分：0)
您可能需要查看距离矩阵服务：https://developers.google.com/maps/documentation/javascript/distancematrix
它为您提供了一组来源和目的地之间的距离，可能会帮助您缩小选项范围。
<强> 2。找到最佳路线：
如果使用Web服务，请确保在列出航点之前设置optimize：true，并检查waypoint_order数组。
如果使用JS API，请在请求中设置optimizeWaypoints：true。
第3。要使用您拥有的latlong绘制折线
PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true);
for (int z = 0; z < list.size(); z++) {
LatLng point = list.get(z);
options.add(point);
}
line = myMap.addPolyline(options);
答案 2 :(得分：0)
使用Google地图方向api，您可以实现它，请按照有关使用航点的文档进行操作 - https://developers.google.com/maps/documentation/directions/intro#Waypoints
现在一个功能齐全的api看起来像这样 -
此处原点 =起点，目的地 =结束点，航路点 =您想要涵盖的点，优化：true =通过给定航点的路线将被优化（即遵循旅行商问题）和key =你的地图api密钥。
现在为了保存api响应，这里是模型类 -
public class DirectionApiResponse {
private ArrayList<Geocoded_waypoints> geocoded_waypoints;
private String status;
private ArrayList<Routes> routes;
public ArrayList<Geocoded_waypoints> getGeocoded_waypoints ()
{
return geocoded_waypoints;
}
public void setGeocoded_waypoints (ArrayList<Geocoded_waypoints> geocoded_waypoints)
{
this.geocoded_waypoints = geocoded_waypoints;
}
public String getStatus ()
{
return status;
}
public void setStatus (String status)
{
this.status = status;
}
public ArrayList<Routes> getRoutes ()
{
return routes;
}
public void setRoutes (ArrayList<Routes> routes)
{
this.routes = routes;
}
@Override
public String toString()
{
return "ClassPojo [geocoded_waypoints = "+geocoded_waypoints+", status = "+status+", routes = "+routes+"]";
}
public class Geocoded_waypoints
{
private String place_id;
private String geocoder_status;
private ArrayList<String> types;
public String getPlace_id ()
{
return place_id;
}
public void setPlace_id (String place_id)
{
this.place_id = place_id;
}
public String getGeocoder_status ()
{
return geocoder_status;
}
public void setGeocoder_status (String geocoder_status)
{
this.geocoder_status = geocoder_status;
}
public ArrayList<String> getTypes ()
{
return types;
}
public void setTypes (ArrayList<String> types)
{
this.types = types;
}
@Override
public String toString()
{
return "ClassPojo [place_id = "+place_id+", geocoder_status = "+geocoder_status+", types = "+types+"]";
}
}
public class Routes {
private String summary;
private Bounds bounds;
private String copyrights;
private ArrayList<String> waypoint_order;
private ArrayList<Legs> legs;
private ArrayList<String> warnings;
private Overview_polyline overview_polyline;
public String getSummary() {
return summary;
}
public void setSummary(String summary) {
this.summary = summary;
}
public Bounds getBounds() {
return bounds;
}
public void setBounds(Bounds bounds) {
this.bounds = bounds;
}
public String getCopyrights() {
return copyrights;
}
public void setCopyrights(String copyrights) {
this.copyrights = copyrights;
}
public ArrayList<String> getWaypoint_order() {
return waypoint_order;
}
public void setWaypoint_order(ArrayList<String> waypoint_order) {
this.waypoint_order = waypoint_order;
}
public ArrayList<Legs> getLegs() {
return legs;
}
public void setLegs(ArrayList<Legs> legs) {
this.legs = legs;
}
public ArrayList<String> getWarnings() {
return warnings;
}
public void setWarnings(ArrayList<String> warnings) {
this.warnings = warnings;
}
public Overview_polyline getOverview_polyline() {
return overview_polyline;
}
public void setOverview_polyline(Overview_polyline overview_polyline) {
this.overview_polyline = overview_polyline;
}
@Override
public String toString() {
return "ClassPojo [summary = " + summary + ", bounds = " + bounds + ", copyrights = " + copyrights + ", waypoint_order = " + waypoint_order + ", legs = " + legs + ", warnings = " + warnings + ", overview_polyline = " + overview_polyline + "]";
}
public class Bounds
{
private Southwest southwest;
private Northeast northeast;
public Southwest getSouthwest ()
{
return southwest;
}
public void setSouthwest (Southwest southwest)
{
this.southwest = southwest;
}
public Northeast getNortheast ()
{
return northeast;
}
public void setNortheast (Northeast northeast)
{
this.northeast = northeast;
}
@Override
public String toString()
{
return "ClassPojo [southwest = "+southwest+", northeast = "+northeast+"]";
}
public class Southwest
{
private String lng;
private String lat;
public String getLng ()
{
return lng;
}
public void setLng (String lng)
{
this.lng = lng;
}
public String getLat ()
{
return lat;
}
public void setLat (String lat)
{
this.lat = lat;
}
@Override
public String toString()
{
return "ClassPojo [lng = "+lng+", lat = "+lat+"]";
}
}
public class Northeast
{
private String lng;
private String lat;
public String getLng ()
{
return lng;
}
public void setLng (String lng)
{
this.lng = lng;
}
public String getLat ()
{
return lat;
}
public void setLat (String lat)
{
this.lat = lat;
}
@Override
public String toString()
{
return "ClassPojo [lng = "+lng+", lat = "+lat+"]";
}
}
}
public class Overview_polyline {
private String points;
public String getPoints() {
return points;
}
public void setPoints(String points) {
this.points = points;
}
@Override
public String toString() {
return "ClassPojo [points = " + points + "]";
}
}
public class Legs {
private Duration duration;
private Distance distance;
private End_location end_location;
private String start_address;
private String end_address;
private Start_location start_location;
private ArrayList<String> traffic_speed_entry;
private ArrayList<String> via_waypoint;
private ArrayList<Steps> steps;
public Duration getDuration() {
return duration;
}
public void setDuration(Duration duration) {
this.duration = duration;
}
public Distance getDistance() {
return distance;
}
public void setDistance(Distance distance) {
this.distance = distance;
}
public End_location getEnd_location() {
return end_location;
}
public void setEnd_location(End_location end_location) {
this.end_location = end_location;
}
public String getStart_address() {
return start_address;
}
public void setStart_address(String start_address) {
this.start_address = start_address;
}
public String getEnd_address() {
return end_address;
}
public void setEnd_address(String end_address) {
this.end_address = end_address;
}
public Start_location getStart_location() {
return start_location;
}
public void setStart_location(Start_location start_location) {
this.start_location = start_location;
}
public ArrayList<String> getTraffic_speed_entry() {
return traffic_speed_entry;
}
public void setTraffic_speed_entry(ArrayList<String> traffic_speed_entry) {
this.traffic_speed_entry = traffic_speed_entry;
}
public ArrayList<String> getVia_waypoint() {
return via_waypoint;
}
public void setVia_waypoint(ArrayList<String> via_waypoint) {
this.via_waypoint = via_waypoint;
}
public ArrayList<Steps> getSteps() {
return steps;
}
public void setSteps(ArrayList<Steps> steps) {
this.steps = steps;
}
@Override
public String toString() {
return "ClassPojo [duration = " + duration + ", distance = " + distance + ", end_location = " + end_location + ", start_address = " + start_address + ", end_address = " + end_address + ", start_location = " + start_location + ", traffic_speed_entry = " + traffic_speed_entry + ", via_waypoint = " + via_waypoint + ", steps = " + steps + "]";
}
public class Duration {
private String text;
private String value;
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
@Override
public String toString() {
return "ClassPojo [text = " + text + ", value = " + value + "]";
}
}
public class Start_location
{
private String lng;
private String lat;
public String getLng ()
{
return lng;
}
public void setLng (String lng)
{
this.lng = lng;
}
public String getLat ()
{
return lat;
}
public void setLat (String lat)
{
this.lat = lat;
}
@Override
public String toString()
{
return "ClassPojo [lng = "+lng+", lat = "+lat+"]";
}
}
public class End_location {
private String lng;
private String lat;
public String getLng() {
return lng;
}
public void setLng(String lng) {
this.lng = lng;
}
public String getLat() {
return lat;
}
public void setLat(String lat) {
this.lat = lat;
}
@Override
public String toString() {
return "ClassPojo [lng = " + lng + ", lat = " + lat + "]";
}
}
public class Distance {
private String text;
private String value;
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
@Override
public String toString() {
return "ClassPojo [text = " + text + ", value = " + value + "]";
}
}
public class Steps
{
private String html_instructions;
private Duration duration;
private Distance distance;
private End_location end_location;
private Polyline polyline;
private Start_location start_location;
private String travel_mode;
public String getHtml_instructions ()
{
return html_instructions;
}
public void setHtml_instructions (String html_instructions)
{
this.html_instructions = html_instructions;
}
public Duration getDuration ()
{
return duration;
}
public void setDuration (Duration duration)
{
this.duration = duration;
}
public Distance getDistance ()
{
return distance;
}
public void setDistance (Distance distance)
{
this.distance = distance;
}
public End_location getEnd_location ()
{
return end_location;
}
public void setEnd_location (End_location end_location)
{
this.end_location = end_location;
}
public Polyline getPolyline ()
{
return polyline;
}
public void setPolyline (Polyline polyline)
{
this.polyline = polyline;
}
public Start_location getStart_location ()
{
return start_location;
}
public void setStart_location (Start_location start_location)
{
this.start_location = start_location;
}
public String getTravel_mode ()
{
return travel_mode;
}
public void setTravel_mode (String travel_mode)
{
this.travel_mode = travel_mode;
}
@Override
public String toString()
{
return "ClassPojo [html_instructions = "+html_instructions+", duration = "+duration+", distance = "+distance+", end_location = "+end_location+", polyline = "+polyline+", start_location = "+start_location+", travel_mode = "+travel_mode+"]";
}
public class Polyline
{
private String points;
public String getPoints ()
{
return points;
}
public void setPoints (String points)
{
this.points = points;
}
@Override
public String toString()
{
return "ClassPojo [points = "+points+"]";
}
}
}
}
}
}
现在要在路点之间绘制路线，您可以使用以下方法 -
private void setRoutePath(DirectionApiResponse directionObj){
gMap.clear();
addMarkers(localLeedsArrayList);
int count = 0;
ArrayList<LatLng> points = null;
DirectionApiResponse.Routes route = directionObj.getRoutes().get(0);
// Traversing through all the routes
for(DirectionApiResponse.Routes.Legs leg : route.getLegs()){
PolylineOptions lineOptions = new PolylineOptions();
points = new ArrayList<LatLng>();
Log.e("Route", leg.getStart_address()+" "+leg.getEnd_address());
// Fetching all the points in i-th route
//for(DirectionApiResponse.Routes.Legs.Steps step : leg.getSteps()){
for(int j=0;j<leg.getSteps().size();j++){
DirectionApiResponse.Routes.Legs.Steps step = leg.getSteps().get(j);
points.addAll(PolyUtil.decode(step.getPolyline().getPoints()));
}
// Adding all the points in the route to LineOptions
lineOptions.addAll(points);
lineOptions.width(20);
lineOptions.color(colors[count]);
Polyline polylineFinal = gMap.addPolyline(lineOptions);
count++;
}
Log.e("SouthWest",directionObj.getRoutes().get(0).getBounds().getSouthwest().getLat()+" "+directionObj.getRoutes().get(0).getBounds().getSouthwest().getLng());
Log.e("northeast",directionObj.getRoutes().get(0).getBounds().getNortheast().getLat()+" "+directionObj.getRoutes().get(0).getBounds().getNortheast().getLng());
/*LatLng lSouth = new LatLng(Double.valueOf(directionObj.getRoutes().get(0).getBounds().getSouthwest().getLat()),
Double.valueOf(directionObj.getRoutes().get(0).getBounds().getSouthwest().getLng()));
LatLng lNorth = new LatLng(Double.valueOf(directionObj.getRoutes().get(0).getBounds().getNortheast().getLat()),
Double.valueOf(directionObj.getRoutes().get(0).getBounds().getNortheast().getLng()));
LatLngBounds latLngBounds = new LatLngBounds(lNorth,lSouth);
gMap.animateCamera(CameraUpdateFactory.newLatLngBounds(latLngBounds,14));*/
gMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(mCurrentLocation.getLatitude(),mCurrentLocation.getLongitude()),15));
}
此处 gMap 是Google地图对象..
*******更新Api致电********
为了调用api创建界面 IApiMethods 并将代码放在下面 -
@GET("json?origin=35.693391,51.424261&destination=35.692032,51.432715&waypoints=35.691997,51.432758")
Call<DirectionApiResponse> getDirectionWalking(@Query("key")String key);
你可以相应改变坐标
现在调用下面的方法来调用api并获取DirectionApiResponse对象
private void getDirection(){
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://maps.googleapis.com/maps/api/directions/")
.addConverterFactory(GsonConverterFactory.create())
.build();
IApiMethods service = retrofit.create(IApiMethods.class);
Call<DirectionApiResponse> directionApiResponseCall = service.getDirectionWalking("YOUR API KEY");
directionApiResponseCall.enqueue(new Callback<DirectionApiResponse>() {
@Override
public void onResponse(Call<DirectionApiResponse> call, Response<DirectionApiResponse> response) {
setRoutePath(response.body());
}
@Override
public void onFailure(Call<DirectionApiResponse> call, Throwable t) {
}
});
}
最后将以下依赖项添加到应用程序的build.gradle文件 -
compile 'com.google.android.gms:play-services-maps:8.4.0'
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.retrofit2:converter-gson:2.0.2'