Android:构建多边形地理围栏 [英] Android: Build Polygonal Shape Geofence

问题描述

根据 API 文档，只允许使用圆形地理围栏:

According to the API documentation, only Circular shape Geofences allowed:

https://developers.google.com/android/reference/com/google/android/gms/location/Geofence.Builder

And it's looks for example: https://developer.android.com/training/location/geofencing.html

But I have 4 locations, representing 4 corners of rectangle, and I want my Geofence to be that rectangle.

I want to avoid solution of building my custom location monitoring service extending the functionality of monitoring Geofences, because I think this kind of services are CPU & power consuming...

Thanks,

解决方案

You have to do it by yourself (however I think it's rather senseless - geofences/location services are inaccurate enough to not even be able to alert about circles, don't even think about some other concrete shape).

Create smallest circular geofence which contains your polygon and if triggered just check if you are in the polygon inside with Google Maps Android API utility library.

In other words check if you are in white area not in grey:

这篇关于Android:构建多边形地理围栏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！