Mit welcher Methode kann man in Java Code schreiben, um über die Baidu Map API benutzerdefinierte Pfeile auf der Karte zu zeichnen?

import javax.swing.*;
import com.baidu.mapapi.map.*;
import com.baidu.mapapi.model.*;
import com.baidu.mapapi.CoordType;
import com.baidu.mapapi.SDKInitializer;

public class CustomArrowMap extends JFrame {
    private BaiduMap baiduMap;
  
    public CustomArrowMap() {
        SDKInitializer.initialize();
        SDKInitializer.setCoordType(CoordType.BD09LL); // 设置坐标类型为百度坐标系
        
        baiduMap = new BaiduMap(new MapOptions()
                .mapType(BaiduMap.MAP_TYPE_NORMAL) // 设置地图类型为普通地图
                .compassEnabled(false) // 禁用指南针
                .zoomControlsEnabled(false) // 禁用缩放控件
                .zoomGesturesEnabled(true)); // 开启手势缩放
    }
  
    public static void main(String[] args) {
        CustomArrowMap customArrowMap = new CustomArrowMap();
        customArrowMap.setSize(800, 600); // 设置窗口大小
        customArrowMap.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        customArrowMap.setVisible(true); // 显示窗口
        
        MapView mapView = new MapView(customArrowMap.baiduMap); // 创建地图视图
        customArrowMap.getContentPane().add(mapView); // 将地图视图添加到画布上
    }
}

import java.util.*;
import com.baidu.mapapi.map.*;
import com.baidu.mapapi.model.*;

public class CustomArrowOverlay extends Overlay {
    private List<LatLng> points;
    private int color;
  
    public CustomArrowOverlay(List<LatLng> points, int color) {
        this.points = points;
        this.color = color;
    }
  
    @Override
    public final void draw(Canvas canvas, MapView mapView, boolean shadow) {
        super.draw(canvas, mapView, shadow);
        
        // 设置画笔的属性，如颜色、宽度等
        Paint paint = new Paint();
        paint.setColor(color);
        paint.setStyle(Paint.Style.FILL);
        paint.setStrokeWidth(5);
        
        // 绘制自定义箭头
        Path path = new Path();
        for(int i = 0; i < points.size(); i++) {
            LatLng point = points.get(i);
            Point screenPoint = mapView.getProjection().toScreenLocation(point);
            if(i == 0) {
                path.moveTo(screenPoint.x, screenPoint.y);
            } else {
                path.lineTo(screenPoint.x, screenPoint.y);
            }
        }
        canvas.drawPath(path, paint);
    }
}

import java.util.*;
import com.baidu.mapapi.map.*;
import com.baidu.mapapi.model.*;

public class CustomArrowMap extends JFrame {
    // ...
  
    public void addCustomArrowOverlay(List<LatLng> points, int color) {
        CustomArrowOverlay overlay = new CustomArrowOverlay(points, color);
        baiduMap.addOverlay(overlay); // 添加自定义箭头Overlay
    }
  
    public void clearCustomArrowOverlays() {
        baiduMap.clear(); // 清除地图上的所有Overlay
    }
  
    // ...
}

public static void main(String[] args) {
    // ...
  
    // 绘制自定义箭头示例
    List<LatLng> points = new ArrayList<>();
    points.add(new LatLng(39.906901, 116.397972));
    points.add(new LatLng(39.904850, 116.408438));
    points.add(new LatLng(39.915587, 116.401533));
    customArrowMap.addCustomArrowOverlay(points, Color.RED);
  
    // ...
}