CodePudding user response:

I also encountered the same problem:
My AndroidStudio version: 3.1.1
The solution: on my side to create a AndroidStudio project, in the point of this button, you can see,

CodePudding user response:

Use the correct gradle plugin, 3.2.1

CodePudding user response:

The landlord to solve this problem, I also encountered this kind of situation, not the Generate Singed Apk this option, pack out Apk tip without installing any certificate,

CodePudding user response:

Click on the file/Sync Project with Gradle Files

CodePudding user response:

Someone is solved

CodePudding user response:

Please confirm the following:
1. No similar x, your next to the run and written app three words

2. Your bottom bar "build" a bar without error message

3. Switch to your project at the upper column can become when Android option as style