with apps like "Floating Notifications" or "NotifierPro Plus" it is possible to create a popup notification in case of an incomming event (SMS, Email, WhatsApp, ...).
Problem [MIUI 3.6.28, SGS2]:
The notifications appears correctly but the popups are not clickable. This problem exist...
The choice of the favorite keyboard are lost after a restart of the smartphone.
After smartphone reboot, the last listed keyboard of the keyboard selection list (settings) is defined as standard keyboard.