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问题描述
我是Android开发的新手，并且正在创建一个应用程序，该应用程序允许用户在特定位置周围创建提醒的Geo围栏.例如:在杂货店周围做一个地理围栏，以提醒用户进入时要领取橙汁.
I'm new to Android development and am creating an app that allows a User to create a Geo fence around a specific location for reminders. For example: Making a geofence around a grocery store to remind the user as he enters to pick up Orange Juice.
有人知道一个教程可以帮助开发这样的东西吗?
Does anyone know of a tutorial that could help in developing something like this?
推荐答案
AFAIK没有用于地理围栏的教程，但这很简单(假设您需要圆形围栏).
AFAIK there are no tutorials for geofencing, but it's pretty simple (assuming you want a circular fence).
- 本教程将告诉您如何获取用户的位置 >
- 任何链接都将向您展示如何计算其当前位置与栅栏中心之间的距离
- 以固定的间隔计算它们到中心的距离.我会让他们通过设置屏幕来设置时间间隔，并以默认的五分钟左右开始，因为除此以外的其他任何事情都会消耗大量电池.每次获取时都存储该距离.
- 如果他们的最后距离与新距离相比越过边界，请执行操作.例如，我开发了一个应用程序，该应用程序可以在孩子离开朋友家或上学时向父母发出警报.
- This tutorial will tell you how to get the user's location
- Any of these links will show you how to calculate the distance between their current location and the centerpoint for their fence
- Calculate their distance from the center at regular intervals. I'd let them set the interval through a settings screen and start with a default around five minutes because anything more than that is a hefty battery drain. Store that distance every time you get it.
- If their last distance compared to their new distance crosses the boundary, perform your action. For instance, I worked on an app that would alert a parent if the child left a friend's house or arrived at school.
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