Autocompletion not showing in Android Studio with dual screens

Question

I just switched from Eclipse to Android Studio (IntelliJ).

I can't figure out how the autocompletion works! I tried Control + Space, Control + Shift + Space but i have no relevant suggestion. Not in the Java files, not in the layout files.

Is there another shortcut? Do I need to enable some option beforehand?

Answer 1

Preferences > Keymap > Code > Completion > Basic/SmartType: