This works really well, unsure if it's available on android
https://itunes.apple.com/gb/app/road-id/id569352341?mt=8
It creates a link that you can send through either text email Facebook message etc
Once you sent it the recipient follows the link to a map and shows where you are and where you've been, I think it updates every 1-2 minutes
It also alerts anyone using the link if you have stopped for a period of time (optional)
You have to set how many hours you will be out for so I always select 10 hours otherwise if your not back within the selected time it stops monitoring you