问题
I use in my app TLocationSensor on Android but I have a problem with Distance property. If I set 10 meters and I don't move OnLocationChange is fired.
What should I set and how to make it work ?
回答1:
Probably the XE5's location sensor component does work - it is just the device incapable of providing Delphi accurate enough data under given circumstances.
You can take some mapping software like MapSoft Navigator and record a track for few hours. If that track would show the significant deviations, then it means the device thinks it is being sporadically moved. And it reports those movements to Delphi, which triggers the events.
See the data presumably gathered under open skies, even without reinforced concrete walls making reflections and distortions: https://gis.stackexchange.com/questions/12011
来源：https://stackoverflow.com/questions/20939472/xe5-locationsensor-distance-doesnt-work