https://developer.android.com/reference/androidx/preference/PreferenceFragmentCompat?authuser=0
PreferenceFragmentCompat | API reference | Android Developers
api referenceandroiddevelopers
https://developer.android.google.cn/reference/android/support/v7/preference/PreferenceFragmentCompat
PreferenceFragmentCompat | API reference | Android Developers
api referenceandroiddevelopers