androidx.constraintlayout.widget.constraintlayout don't have chains that you can drag

Question

I'm using androidx.constraintlayout.widget.ConstraintLayout in my layout and it does not show the chains, also I can't drag any widgets. I just type the constraints that I want to use.

<androidx.constraintlayout.widget.ConstraintLayout     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="112dp"/> 

here's a sample screen shot for androidx constraintLayout: androidx.constraintlayout.widget.ConstraintLayout

but when I tried switching back to : android.support.constraint.ConstraintLayout it i can see it

<android.support.constraint.ConstraintLayout     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="112dp"/> 

here's a sample screen shot for support constraintLayout: android.support.constraint.ConstraintLayout

is this a bug or something?

edit:

my current solution is to switch from:

implementation 'androidx.constraintlayout:constraintlayout:1.1.2' 

to

implementation 'com.android.support.constraint:constraint-layout:1.1.2' 

but this does not solve my problem cause I don't want to use support.

Answer 1

I had the same problem until I realized that I should use the Canary version to solve it. after installing Canary version beside stable version, open the project and now you can use this implementation:

implementation 'androidx.constraintlayout:constraintlayout:1.1.2' 

instead of

implementation 'com.android.support.constraint:constraint-layout:1.1.2' 

Keep in mind that you may need to do the following:

• clean project
• rebuild
• invalidate caches/restart

My problem solved with this method.