So I have been playing around with MotionLayout to get certain animations to work, but I had an issue with barriers when converting the ConstraintLayout to the MotionLayout. I have a barrier that references two header views on the top of the parent layout and a ViewGroup that constrains the top of the ViewGroup to the bottom of the barrier; however, when I convert the ConstraintLayout to the new MotionLayout, the barrier does not work anymore. My ViewGroup gets constrained to the top of the parent instead of the bottom of the barrier. I assume this is because the library is still in alpha, but I'm hoping someone has some sort of workaround on that.
Edit:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.motion.MotionLayout
usual stuff here
app:layoutDescription="@xml/scene">
<CustomHeaderView
android:id="@+id/first_header"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:visibility="gone"
app:attachedRecyclerView="@+id/some_recycler_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<SecondCustomHeaderView
android:id="@+id/second_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible"
app:attachedRecyclerView="@+id/some_recycler_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<android.support.constraint.Barrier
android:id="@+id/barrier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="bottom"
app:constraint_referenced_ids="first_header,second_header"
tools:layout_editor_absoluteY="241dp" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/some_swipe_container"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@id/barrier"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<android.support.v4.widget.NestedScrollView
android:id="@+id/nested_scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/some_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants"
android:nestedScrollingEnabled="false" />
</android.support.v4.widget.NestedScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.constraint.motion.MotionLayout>
Thanks!