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, orientation, orientation & all others android attributes.)

Things i have done to resolve this issue.

Clean Build & Rebuild Deleted .idea file Invalidated Caches/ Restart.. option Turn On Power Save Mode. SDk is up to date.

Unknown attribute android:orientation less. (Ctrl+F1) This inspection highlights unknown XML attributes in Android resource files and AndroidManifest.xml

currently using :

 Android studio 3.2.1
 targetSdkVersion 27
 ext.kotlin_version = '1.2.61'
 build:gradle:3.2.1

I tried with deleting .idea in the path and invalidate cache and restart ,synching the gradle

Miscreance

Have you check if you have a correct AndroidManifest.xml xml structure? – Diacetylmorphine

yes i checked with all posiibilities – Miscreance

Try checking if Android plugins is enabled in your setting. – Diacetylmorphine

yeah checked,its already enabled – Miscreance

Try moving your project to a path which doesn't have a space (` `) in it. – Diacetylmorphine

i got a solution by uninstalling adroid studio and changing the sdk path – Miscreance

Can you post the build output where the error is displayed? Your screenshot is not of great use without that – Decided

while building it will not show anything,after that in XML Getting Unknown attribute error on all android tag. – Miscreance

Possible duplicate of Unknown attribute android:layout_width, layout_height, id, gravity, layout_gravity, padding – Allahabad

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\

Phelgon

it was solution in my case, before this I tried all possible ways but nothing helped – Bartz

and one more thing,delete the wrapper gradle-version-all and again rebuild the application.. – Miscreance

It works. In the end, I just need to sync gradle with project and click the hammer button. – Ushijima

This is the only solution that's worked for me. Thank you! – Croton

Yes, this should be marked as right & accepted answer among all others answers for this issue on S.O. – Umont

Where can we find the folders in Linux distribution? – Toby

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"

Warlike