Android studio shows decompiled class, not Java class

Question

My KeyboardViewopened normally, and whenever I click on this extended class, it shows the class .java, but I tried to edit this class, and there were editing options for this session. After that, whenever I click on this extended class KeyboardView, it does not show the java class, which only shows the .class class. How can I solve this problem?

EDIT

there were these options and I chose the first one after that it happened

Answer 1

Eliminated this problem by installing a new sdk