Is there any way to implement proximity alert via a service in android?

Question

我正在制作一个从用户获取位置的应用程序以设置近距离警报，但问题是该应用程序仅在其在前台运行时才触发警报...。当用户通过按后退按钮退出时，该应用程序不显示任何警报，即使应用程序不在前台，我也想继续检查近距离通讯，我尝试将近距离通讯放入服务中，但根本无法使用...请提出任何建议！

Answer 1

I think what you want to implement is covered by Geofencing in Android. You can take a look here https://developers.google.com/android/reference/com/google/android/gms/location/GeofencingApi or here http://www.technology-ebay.de/the-teams/mobile-de/blog/geofencing-in-the-mobile-de-android-app.html .

In short, you define a location and a radius, and if an event is triggered (entering or exiting the area) you get notified.