Android Studio 3.0 xml-layout file's preview not showing

Question

When I open layout file in my new Android-Studio file and press preview tab it\'ll show a message Waiting for build to finish... for infinite time.

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Answer 1

try different theme (may be from Appcompat) and API level from top

OR

1. If you have made some changes in the layout just undo it.
2. delete .idea and .gradle folder from root of the project
3. close android studio , restart it
4. click on gradle icon from right sidebar and click sync icon to refresh project. now rebuild the project and it should work.