问题
I am using Android Studio 3.0.1. Whenever I drag button or do any other activity on my Activity Screen it gives me the following error
Missing Constraints in ConstraintLayout"
I need a permanent fix for this issue. Please help me.
回答1:
See in the pallete just above your design you will see a wand type tool, when you will hover over it it will show infer constraint , just click on it and your problem will be solved
回答2:
Go to the text view in your .xml file hover the cursor to the Error part(Red Underline) and Press (Alt + Enter) it will show you to automatically add the missing things select that and it will be resolved
来源：https://stackoverflow.com/questions/47778506/getting-error-missing-constraints-in-constraintlayout