Android studio design editor is unavailable until after a successful project sync

Question

what is the actual root cause of this issue? I already sync with gradle files but eventually failed.

Answer 1

Just sync your project with gradles. File --> Sync Project with Gradle Files

Answer 2

If nothing of the above steps work, Then simply undo the changes that you have recently made, and then build gradle. In my case, I have added one dependencies and this problem raised, so I removed that dependencies build the gradle and then again add it. Problem Solved..!!

Answer 3

I had this problem and it was because I didn't have the right API level installed (and I was also getting an error to that effect). I went into Tools --> SDK Manager and installed the API the system was telling me I needed (in my case, 30). I did that and restarted Android Studio and was able to get into XML files.

Answer 4

Just you have to do >> open File --> Sync Project with Gradle Files and then after >> open File --> invalidate Android Studio caches / restart so done this problem.:)

Answer 5

Issue happened to me when I changed the res>values>styles.xml

What I change was
"Theme.AppCompat.Light.DarkActionBar" --->>> "Base.Theme.AppCompat.Light.DarkActionBar"

Solutions I tried.

1. Build -> Rebuild Project (Not worked)
2. Close all files and Open again. Then Build -> Clean Project (Not worked) File -> Sync project with gradle files (Not worked)
3. Close the Android Studio while project still opened. Opened it again. - It Worked.

Answer 6

1. Build -> Clean Project

2. Build -> Rebuild Project

3. File -> Sync project with gradle files . If not worked then try

   File -> Invalidate Caches / Restart .

It's work for me !!!