[Android official document says "Allows access to new APIs on older API versions of the platform (many using Material Design)."][1]
For example, [android:backgroundTint][2] is available to API level 21, but [AppCompatTextView][3] makes it available for lower API levels. That is exactly what the official document says:
A TextView which supports compatible features on older versions of the platform, including: Allows setting of the background tint using backgroundTint and backgroundTintMode
However, I get the following warning when I use [AppCompatTextView][3]:
[![enter image description here][4]][4]
Could anyone shed some light on exact meaning of "supports compatible features on older versions"? [1]: https://developer.android.com/jetpack/androidx/releases/appcompat [2]: https://developer.android.com/reference/android/view/View#attr_android:backgroundTint [3]: https://developer.android.com/reference/androidx/appcompat/widget/AppCompatTextView [4]: https://i.stack.imgur.com/tYTaR.png
