问题
Is there a Leanback library support for API level 19 of Android? In this link https://developer.android.com/reference/android/support/v17/leanback/package-summary.html Google says it supports API level 21+. So I am not sure if there's a support for API level 19.
回答1:
LeanBack was introduced in the support library v21 so no it is not in v19
http://developer.android.com/tools/support-library/features.html#v17-leanback
if you are asking if you can use this in android version 19 aka 4.4 yes just use support library v21
来源：https://stackoverflow.com/questions/28075533/leanback-library-support-for-api-level-19-android-for-tv-app