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The Xamarin.Contacts SaveThumbnailAsync() fails on Android if run on a background thread that hasn't created a looper.
This bug was fixed in later version (v0.7.7 worked for me).
I also wanted to point out that the Mobile API is being deprecated in favor of various plugins (which have the equivalent/same API):
- Contacts: https://www.nuget.org/packages/Xam.Plugin.Contacts
- Geolocator: https://www.nuget.org/packages/Xam.Plugin.Geolocator
- Media: https://www.nuget.org/packages/Xam.Plugin.Media
This plugin model has several advantages:
- Each plugin is independent, and can be updated as such
- It is no longer an all-or-nothing package
- Plugins can be mixed/replaced with other plugins that offer similar features
Thanks for using the Mobile API, and we hope that the new plugin model will enable you to produce even better mobile apps.
With regards to this specific feature, it is not currently implemented in the new plugin due to complex implementation details:
If this feature is required, then please feel free to ad your vote to the issue and we can have a look at it again.