How can I fix “Design editor is unavailable until a successful build” error?

Question

I started to learn Android Studio from yesterday. I try to echo out simple \"Hello World\":

Answer 1

If you are in corporate setting where there is a proxy server, double check your proxy settings.

1. Go File -> Settings
2. Search for Proxy.
3. Fill out as appropreate.
4. Test connection.

If you think you fat-fingered the password, there is a Clear passwords button you can click to where you can re-enter your creds. HTH

Answer 2

Go to File > Sync Project with Gradles Files.

Answer 3

just click file in your android studio then click Sync Project with Gradle Files..

if it won't work, click Build click Clean Project.

it always work for me

Answer 4

In my case, it was because it didn't like that I left the minSDK and targeSdk in the manifest. Go figure.

Answer 5

Simply restart the Android Studio. In my case, I was offline before starting the Android Studio, but online when I did restart.

Answer 6

Edit you xml file in Notepad++ and build it again. It's work for me