Support Library | Android Developers
The Support Library is a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs. Compatible on devices running API 14 or later.
NuGet Gallery | Xamarin.Android.Support.v7.AppCompat 28.0.0.3
https://developer.android.com/tools/support-library/setup.html. It says I should use SDK manager to download and add v7-appcompat, however I have to connect to internet through proxy and when I use SDK manager it cannot download anything. So how can I download and add v7-appcompat?
Maven Repository: com.android.support » appcompat-v7
Here is a more complete list of ways you can use the support libraries in your app: Backward Compatibility for newer APIs - A large amount of the support libraries provide backward compatibility for newer framework classes and methods.
Error "package android.support.v7.app does not exist"
MvvmCross.Droid.Support.V7.AppCompat MvvmCross is the .NET MVVM framework for cross-platform solutions, including Xamarin iOS, Xamarin Android, Xamarin Forms, Windows and Mac. This package contains Support v7 AppCompat support for MvvmCross. 1.6M