AppCompat theme for Leanback
You are not allowed to use AppCompat
theme for Android TV with Leanback
library.
You should extend your BaseActivity
of the FragmentActivity
to benefit from the Support
Components.
You can't use Theme.Leanback for Activities extending AppCompatActivity. For using support fragments you can't extend the activity with android.app.Activity either. For using support fragments extend your activity with android.support.v4.app.FragmentActivity.