CodePudding user response:

You don't have a reference FLoatingActionButton classes or libraries

CodePudding user response:

FloatingActionButton does not exist, it's bag without reference or error

CodePudding user response:

reference 1st floor usecf response:

you don't have a reference FLoatingActionButton class or the library files

How can I refer to

CodePudding user response:

Add the compile 'com. Android. Support: design: 25.3.1' android studio synchronization, will download this library

CodePudding user response:

Is in gradle the dependencies? How do I or wrong

CodePudding user response:

Is in gradle the dependencies? I was wrong