Doesn't work with Constraint Layout

[easycheese]

I even set it up with a regular RelativeLayout and converted it. Nothing works in Constraint Layout

RelativeLayout version:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.companionfree.kdmgenerator.main.MainActivity">

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<com.turingtechnologies.materialscrollbar.DragScrollBar
    android:id="@+id/dragScrollBar"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    app:msb_recyclerView="@id/recycler"
    android:layout_alignParentEnd="true"
    android:layout_alignParentRight="true"
    app:msb_lightOnTouch="true"
    app:msb_handleColor="@color/colorAccent"
    app:msb_barColor="@color/colorAccent"
    />

<TextView
    android:id="@+id/empty_message"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:text="@string/no_data_found"
    android:textSize="20sp"
    tools:visibility="visible"
    android:layout_centerInParent="true"
    android:visibility="gone" />

<android.support.design.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintBottom_toBottomOf="parent">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_add_white_24dp" />
</android.support.design.widget.CoordinatorLayout>

ConstraintLayout

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.companionfree.kdmgenerator.main.MainActivity" android:id="@+id/relativeLayout">

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintStart_toStartOf="parent"/>

<com.turingtechnologies.materialscrollbar.DragScrollBar
    android:id="@+id/dragScrollBar"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    app:msb_recyclerView="@id/recycler"
    app:msb_lightOnTouch="true"
    app:msb_handleColor="@color/colorAccent"
    app:msb_barColor="@color/colorAccent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintRight_toRightOf="parent"/>

<TextView
    android:id="@+id/empty_message"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:text="@string/no_data_found"
    android:textSize="20sp"
    tools:visibility="visible"
    android:visibility="gone"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"/>

<android.support.design.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_add_white_24dp" />
</android.support.design.widget.CoordinatorLayout>

</android.support.constraint.ConstraintLayout>

[GolubRoman]

The same issue too(

[Hartie95]

I have this issue too. To let it the scroolbar show up when using a contraint layout I'm set the following in the XML Definition of the scrollbar:

android:layout_width="wrap_content"
app:layout_constrainedWidth="true"
app:layout_constraintEnd_toEndOf="parent"

But with only this the indicator will be on the left side of the screen so I set an id to the indicator view and added a contraint for it in the linkToScrollBar method if the parent is a contraint layout:

if( msb.getParent() instanceof ConstraintLayout) {
            ConstraintLayout constraintLayout = (ConstraintLayout) msb.getParent();
            ConstraintSet constraintSet = new ConstraintSet();
            constraintSet.clone(constraintLayout);
            constraintSet.connect(getId(), ConstraintSet.END, materialScrollBar.getId(), ConstraintSet.START,size/2);
            constraintSet.applyTo(constraintLayout);
        }

This is probably just a workaround, but it works for me