Installing the Media plugin

We will use the Xam.Plugin.Media NuGet package to access the photo library of the device. We need to install this package for the Chat-, Chat.iOS, and Chat.Android projects in the solution. Before we can use the package, however, we need to do some configuration for each platform. We will start with Android:

1. The plugin needs the WRITE_EXTERNAL_STORAGE and READ_EXTERNAL_STORAGE permissions. The plugin will add these for us, but we need to override OnRequestPermissionResult in MainActivity.cs first.
2. Call the OnRequestPermissionsResult method.
3. Add CrossCurrentActivity.Current.Init(this, savedInstanceState) after initializing Xamarin.Forms in the OnCreate method in the MainActivity.cs file, as shown in the following code:

public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Android.Content.PM.Permission[] grantResults)
{
    Xamarin.Essentials.Platform.OnRequestPermissionsResult...