Unknown attribute android:layout_width...

It is very simple. Delete .caches file:

1、Just close your AS.
2、Go to .AndroidStudio3.2 folder.
3、Delete the Caches file (path is: C:\Users\user.AndroidStudio3.2\system)
4、Restart your AS.
5、Enjoy.

作者：云雾雨烟
来源：CSDN
原文：https://blog.csdn.net/u010886975/article/details/86237429

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