My app needs persistent references to various contacts. Ideally, ContactsContract would include a UUID for each contact which would persist and be the same on each device. Since there doesn't appear to be any such UUID, the next thing I am considering is to get a persistent id from the primary store. I'm open to another solution if anyone has a suggestion. If I access the primary store, I presume the mechanism would be a sync adapter that reads from some Google server and updates a db private to my app. Is this possible, and if so, where do I find documentation on how to interface with such server. Ultimately, I would have to do this for all contact hosts (or pick the most popular ones). I also need the same thing for calendar events, tasks, and email. I thought it would be good to start with investiagting the feasibility with Google contacts. Thanks.
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