How could I sync ONLY my calendar with Gmail (optionally when a WiFi connection is available)?

Question

On my old Nokia C5, there was a quite smart setting to sync the phone calendar with my Gmail calendar when a WiFi connection was available, every say 30 minutes (using MailForExchange).

I'd expected that a tightly-Google-coupled system like Android would do that task even better, but it doesn't (or I wasn't able to figure out how).

First of all, automatic synchronizing is disabled because I don't want to sync contacts, images, mails, whatever. Only my calendar!

I know that I could sync the calendar when I go to Settings → Accounts and Synchronisation → tip on my Google account → scroll to the calendar entry → sync now.

But that's that deep hidden in menus that it is not really fun.

Is there a way to have a shortcut on the home screen that I could use to directly start synchronizing only my calendar with one tip?

If automatic synchronisation with WiFi could be set up (once again: only my calendar), that would be an extra bonus.

My main aim is to sync only the calendar, nothing else.

Answer 1

EDIT: To only sync the calendar you first have to switch off everything else:
Go to Settings -> Accounts -> YOUR Google Account
and un-check all the sync targets you don't want (Chrome, GMail, Drive, Contacts, ...)
/EDIT

Then you can take care of when to have it sync.
Generally, this is left to 3rd party apps.

You can always pick your favourite 3rd-party app to get that feature, and there is a ton of it. Some samples:

• JuiceDefender (free/plus/ultimate/beta, you'll probably have to buy ultimate for the feature you want)
• Tasker
• Llama (not sure if it supports your use case)
• or just search Google Play for 'profile sync schedule' (or similar)

The latter two examples are somewhat complicated to set up but are very powerful. I'd try JuiceDefender.

Answer 2

Too complicated. There are lots of automation apps available on the market which you could use to toggle this stuff depending on the connection available. My favorite again here: Tasker. You could create a profile, and call it e.g. "AutoSync":

Condition: State->Wifi: Wifi Connected
Task: Auto-Sync: Turn On
Exit: Auto-Sync: Turn Off

Once set up, you can forget about it -- Tasker takes care for it automatically.

Afterword: Though Tasker is my favorite, it might not be the easiest solution for everybody. Takes some time to get used to it, costs some 5 Euro -- but is really worth both: no other tool gives you so many possibilities and flexibility. If that's too heavy for you, there are some alternatives available: Check the playstore e.g. for Llama, and also watch out for the "other users also installed..." part of the pages.

Oh: If you insist on an optional widget for your homescreen (that's what the "desktop" is usually called here), Tasker allows you to create them for its tasks as well...