Element androidx. Constraintlayout. Widget. Constraintlayout must be declared

This is why ah, like this, create a project gradle succeeded, the idea of platform, in andriodstudio is normal,

CodePudding user response:

You look at your project build. Gradle ConstraintLayout guide which depend on the package of replacement is ok

CodePudding user response:

Implementation 'androidx. Constraintlayout: constraintlayout: 1.1.3'
This ah, ok, but not 1.1.2