Используйте приложение APKPure
Историческую версию Multi window можно получить на Android
создать свой собственный Multi View окна без обновления телефон
*********** Multi window ***********
Multi window is a unique app with user can create your own multi window view .
Multi window app is differents type of app with user can launch any loaded app.
Features :-
*** initial loading all the application and his features
*** reload new download/install app(if application is not view app gallery)
*** user choose 9 differents theme
*** how to use option is avaiable