Yes Miaogeng we
Use ArcGIS Online environment with ACTGOV enterprise account
Use ArcGIS Online hosted feature service
Answers to other questions:
1) Our base map is not the issue. It gets attached to maps that can be
taken off-line or on-device. The bug has only occurred after the recent
update by esri developer of Collector app to Android version 18.0.1.
2) App crash occurred after update.
3) Fix is as follows:
Select manage - remove feature layers only - download - select base map -
download - see this video of the procedure:
https://drive.google.com/open?id=1i0RAMVB1HrfY6B0mANQz0cCY59UnenDC
I am advising staff and contractors not to update to 18.0.1 until bug can
be resolved. As issue does not occur with previous version of Collector app.