java - Java中的Geofence库

您是否知道Java开源地理围栏库（确定点是否在复杂多边形内），例如适用于Android的Google Play服务？

最佳答案

使用开源库调用“ utils” http://www.geotelematic.com/javadocs/org/opengts/util/package-summary.html


  boolean isPointInside（GeoPoint gp）
            如果指定点在面内，则返回true


。
包含在OpenGts Proyect中：http://www.opengts.org/

import org.opengts.util.GeoPoint;

import org.opengts.util.GeoPolygon;

使用此代码片段检查Point是否在多边形内

    GeoPolygon fence = new GeoPolygon( // Define a Fence Polygon
            new GeoPoint(-31.414547, -64.488178),
            new GeoPoint(-31.415579, -64.496261),
            new GeoPoint(-31.411513, -64.495720),
            new GeoPoint(-31.408726, -64.489549),
            new GeoPoint(-31.411898, -64.484406)
            );

    GeoPoint testgp1 = new GeoPoint(-31.411753, -64.489922);// Point1 inside
    GeoPoint testgp2 = new GeoPoint(-31.413962, -64.486445);// Point2 outside


    boolean inzone = fence.isPointInside(testgp1);
    System.out.println ("Point1 is inside of polygon= "+inzone);
    inzone = fence.isPointInside(testgp2);
    System.out.println ("Point2 is inside of polygon= "+inzone);

结果：

Point1 is inside of polygon= true
Point1 is inside of polygon= false