March 2018
Intermediate to advanced
192 pages
4h 4m
English
Content preview from Mastering Xamarin.Forms - Second Edition
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Maintaining an offline data cache
Currently, the TripLog app's MainViewModel calls the TripLogApiDataService to get its data directly from the live API. As mentioned at the beginning of this chapter, in the event of little or no connectivity, the TripLog app will fail to display any log entries. With a few minor modifications to the MainViewModel, we can set it up to use the Akavache library to retrieve log entries from a local cache, and also to refresh that cache with any changes in the dataset once a connection with a live API succeeds.
First, update the MainViewModel constructor to require an instance of Akavache.IBlobCache, which will be injected via our Ninject implementation from Chapter 4, Platform-Specific Services and Dependency ...