I've got a problem with Android Studio version 3.2.1. I do not see in layout editor  most of attributes like for example id. I have got this bug probably after Android Studio's update. 
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                    have you tried applying different theme? The option is above the layout 'AppTheme', click on it and choose a different theme. – Nero Nov 03 '18 at 21:06
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                    That doesn't work – Przemek Broda Nov 03 '18 at 21:17
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                    What's that view all attributes button in bottom right corner – Vahalaru Nov 03 '18 at 21:29
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                    Shows other attributes but not all of them. It stills doesn't show attribute like id, width, height and much more. This is not how this window should look like – Przemek Broda Nov 03 '18 at 21:51
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                    @Brodeon Mac or PC? – Bikeboy Nov 08 '18 at 16:10
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                    1This happened to me and none of these answers worked for me , i just update android studio and the problem fixed. – Amirhussein Aug 07 '23 at 14:47
 
5 Answers
This worked for me.
Exit android studio then make the below changes.
Go to C:\Users\UserName.android and rename the build-cache folder to build-cache.bak
Go to C:\Users\UserName.AndroidStudio3.2\system and rename these folders
caches to caches.bak
compiler to compiler.bak
compile-server to compile-server.bak
conversion to conversion.bak
external_build_system to external_build_system.bak
frameworks to frameworks.bak
gradle to gradle.bak
resource_folder_cache to resource_folder_cache.bak
Open the Android Studio and open your project again.
No IDEA annotations attached to the JDK 1.8 (C:\...), some issues will not be found
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                    Thank Raynold ! Can i know how you knew the issue and how you solved it? – Avinash Singh Jul 20 '20 at 20:31
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                    Doesn't work on Android Studio Chipmunk. Why do simple stuff all of a sudden stop working on Android Studio and waste so much time?! Google Engineers get paid so much to do what?! QA is more important than shipping new features on half-baked products... – doctorram Sep 11 '22 at 14:49
 
This happened to me today. It was very frustrating, my entire gradle got messed up for unknown reason. in build.gradle (Module: app), I had issues with
implementation 'com.android.support:appcompat-v7:28.0.0' .
I chose to suppress the warning at first, and they put
//noinspection GradleCompatible 
implementation 'com.android.support:appcompat-v7:28.0.0'
for me... Anyways, I replaced above line with
implementation 'com.android.support:appcompat-v7:26.1.0'
and changed my compileSdkVersion to 26
and the attributes in layout editor came back alive.
so I guess that appcompat thing has to do with the layout editor.
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I had to delete all android studio files (not just uninstall and except your projects). I didn't try Raynold's solution, so if you have any problem you can try it before deleting all the files.
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Down of the activity_main.xml window there is "Design" tab and "Text" tab. Click on design tab, select an item and voila: attributes window is on the right
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Starting with Android Studio 3.0.1, all the fields from the Properties panel can now be found under the Attributes by selecting:
View all attributes
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                    1It doesn't show all the atributes that I had in the past. Many attributes which I had in Attributes tab has gone – Przemek Broda Nov 03 '18 at 22:18
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                    1I tried this, also I tried: clean project, rebuild project, reinstalation of android studio. This problem doesn't appear in this one project, it is in all of android studio projects – Przemek Broda Nov 03 '18 at 22:23