问题
How can obtain the last update date from the sync adapters services (marked with red) ?
回答1:
Interesting. The API would (almost have to be) on android.content.ContentResolver as that's where periodic sync and enable/disable sync is managed. There's no API there to request it.
Are you trying to find this value for your own SyncAdapter or for a third party app?
With your own SyncAdapter, you obviously can just store date() into a single-row sqlite table within your ContentProvider and reference it either from the SyncAdapter or the app.
For a third party app, that information... might not be avaliable?
来源：https://stackoverflow.com/questions/6385279/syncadapter-last-update-date