Unknown attribute android

Question

Getting Unknown attribute error on all android tag.

In layout XML, Auto suggestion is not showing all attributes (like layout_width, layout_height, orientat

Answer 1

got the same issue recently with Windows7 and Android studio 3.2.1. what's actually helped is clean up of the following folders:

c:\Users\<user>\.gradle\caches\
c:\Users\<user>\.AndroidStudio3.2\system\caches\

Answer 2

100% Working

These two steps will solve.

Do this two steps: 1.Go to folder where you android studio caches are located. I have android studio 3.6.3 For me it's "C:\Users\Lenovo.AndroidStudio3.6\system\caches" 2.Go to the folder where you android studio projects are located. Open the project >then .idea folder and delete the caches. For me its "C:\Users\Lenovo\AndroidStudioProjects\MyDictionary.idea\caches"