问题
I asked this question (Why Does Map Marker Lurch Around The Map) yesterday. One thing I noticed today is that for an activity that uses LocationManager, but not a map I get the GPS icon (satalite dish beaming signals up) in the status tray. With the activity that has a map fragment and also uses LocationManager I do not get the GPS icon in the tray. I copied and pasted the location manager code from one activity to the other.
Why would the GPS come on some times and not others?
Greg
回答1:
It depend on global GPS setting - if it's globally on, using LocationManager in your Activity\Fragment will fire "satellite dish". If GPS is globally switched off - using LocationManager will not fire.
The reason is that GPS is a huge power consumerist, and allowing it to run without clear user decision to switch it on will drain the device battery extremely quickly.
来源：https://stackoverflow.com/questions/30833628/force-gps-to-come-on