Android Custom Layout在具有设计模式的布局xml文件中遇到问题

Question

I extend ConstraintLayout class for special purpose.

and I use this class in layout xml file.

not problem show layout.xml with text mode.

but try show layout.xml with Design mode, android studio show me this message.

I already try 'Refresh', 'rebuild', 'clean build'.

but still show 'Missing classes'.

how can I fix this problem?

Answer 1

The problem is that you are referencing to a class that doesn't exist or is not where you are referencing to.

You can either fix the path by

• Copying the class to the correct folder.

• Fixing the path by clicking on Fix build path

• Or, click on Create Class and copy everything you had in previous class into the new one.

I think the 3rd option will be the easiest for you.