Tuesday, February 14, 2017

Saving data between user sessions in Xamarin forms

At Application level OnStart, OnSleep and OnResume methods can be used for saving data between user sessions.
At Page level, OnAppearing and OnDisappearing events, whoch are fired when a page is created or right before it is destroyed.
 protected override void OnDisappearing()

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Your project is not referencing the "MonoAndroid,Version=v8.1" framework. Add a reference to "MonoAndroid,Version=v8.1" in the "frameworks" section of your project.json, and then re-run NuGet restore.

I had  the same problem. Reason: file obj/project.assets.json target "MonoAndroid,Version=v7.1" when my project target androi...