I need AppCompatActivity in my MvvmCross application and I don't know how to use it and keep MvxActivity functionality at the same time.
There's a library MvvmCross-AndroidSupport, but I could not find it in NuGet.
Is it available for MvvmCross 3.5.1?
You indeed need the MvvmCross Android support packages. You can find them by searching for prerelease packages on Nuget. The latest available is 4.0-beta5