the following images show my problem in my Android studio. It seems like I somehow messed something up. Usually I would expect to see some predictions like "android:layout_width". Got anybody a clue what I could do to get a neat code prediction again
Windows 8.1, Android studio 2.2.2, JRE 1.8.0_76
Finally,i had solved this problem by deleting .idea folder and all .iml files from the project, restarting Android Studio and rebuilding gradle did the trick. Autocomplete in XML support library is working again.