AMAP APIドキュメント分析：Javaでパスナビゲーションの方向転換誘導機能を実装

import com.amap.api.services.core.AMapException;
import com.amap.api.services.route.RouteSearch;
import com.amap.api.services.route.RouteSearch.DriveRouteQuery;
import com.amap.api.services.route.RouteSearch.FromAndTo;
import com.amap.api.services.route.RouteSearch.OnRouteSearchListener;
import com.amap.api.services.route.RouteSearch.WalkRouteQuery;
import com.amap.api.services.route.RouteSearch.WalkRouteResult;

public class Navigation {

    public static void main(String[] args) {
        // 初始化RouteSearch对象
        RouteSearch routeSearch = new RouteSearch(context);

        // 设置起点和终点
        FromAndTo fromAndTo = new FromAndTo(startPoint, endPoint);

        // 构造路径导航查询参数，并根据需求设置车辆类型、避免拥堵等策略
        DriveRouteQuery query = new DriveRouteQuery(fromAndTo, mode, null, null, "");
        routeSearch.calculateDriveRouteAsyn(query);
      
        // 设置路径导航查询结果的监听器
        routeSearch.setRouteSearchListener(new OnRouteSearchListener() {
            // 路线导航结果回调
            @Override
            public void onDriveRouteSearched(DriveRouteResult driveRouteResult, int i) {
                // 处理路径导航结果
            }

            // 步行导航结果回调
            @Override
            public void onWalkRouteSearched(WalkRouteResult walkRouteResult, int i) {
                // 处理步行导航结果
            }
        });
    }
}

import com.amap.api.services.core.LatLonPoint;
import com.amap.api.services.route.DrivePath;
import com.amap.api.services.route.DriveStep;

public class TurnGuide {

    public static void main(String[] args) {
        // 假设driveRouteResult是路径导航查询结果
        DrivePath drivePath = driveRouteResult.getPaths().get(0);

        // 获取驾车路径上的所有导航段
        List<DriveStep> driveSteps = drivePath.getSteps();

        // 遍历导航段
        for (DriveStep driveStep : driveSteps) {
            // 获取导航段的转向指示信息
            String instruction = driveStep.getInstruction();
            
            // 获取导航段的起点和终点
            LatLonPoint startPoint = driveStep.getPolyline().get(0);
            LatLonPoint endPoint = driveStep.getPolyline().get(driveStep.getPolyline().size() - 1);
            
            // 处理转向指示等信息
        }
    }
}

import javax.swing.*;

public class NavigationUI {

    public static void main(String[] args) {
        // 假设需要展示转向指示的label
        JLabel instructionLabel = new JLabel();
        
        // 假设转向指示信息已经解析出来
        String instruction = "直行";
        
        // 设置转向指示label的文本
        instructionLabel.setText(instruction);
        
        // 展示转向指示label在用户界面上
        JFrame frame = new JFrame();
        frame.add(instructionLabel);
        frame.pack();
        frame.setVisible(true);
    }
}