Which Appium features require Android API level 18/19?

Support
1

Reference: http://appium.io/slate/en/master/?csharp#requirements

As per the link:

ANDROID REQUIREMENTS
Android SDK API >= 17 (Additional features require 18/19)

I want to know which features require Api level 18 and which require API level 19?

Thanks!

2

Google has some documentation on the API level restrictions for various uiautomator features.
http://developer.android.com/tools/help/uiautomator/index.html

Android WebView support requires API >= 19 or using Selendroid