MotionLayout 2.0.0-beta2 scene_03 XML parser error must be within a Constraint 26 about android-constraintlayoutexamples

[zhangqifan1]

<Transition
    motion:constraintSetStart="@+id/start"
    motion:constraintSetEnd="@+id/end"
    motion:motionInterpolator="linear"
    motion:duration="1000">
    <OnSwipe
        motion:touchAnchorId="@+id/iv"
        motion:touchAnchorSide="right"
        motion:dragDirection="dragRight" />
</Transition>

<ConstraintSet android:id="@+id/start">
    <Constraint
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        motion:layout_constraintBottom_toBottomOf="parent"
        motion:layout_constraintStart_toStartOf="parent"
        motion:layout_constraintTop_toTopOf="parent" />

    <CustomAttribute
        motion:attributeName="BackgroundColor"
        motion:customColorValue="#D81B60" />
</ConstraintSet>

<ConstraintSet android:id="@+id/end">
    <Constraint
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        motion:layout_constraintBottom_toBottomOf="parent"
        motion:layout_constraintEnd_toEndOf="parent"
        motion:layout_constraintTop_toTopOf="parent" />

    <CustomAttribute
        motion:attributeName="BackgroundColor"
        motion:customColorValue="#9999FF" />


</ConstraintSet>

[Moosphan]

@zhangqifan1 I think you had wrong usage in your MotionScene, you should put CustomAttribute inside the Constraint because of losing targetView binding.

[zhangqifan1]

<Transition
    motion:constraintSetStart="@+id/start"
    motion:constraintSetEnd="@+id/end"
    motion:duration="1000">

    <OnSwipe
        motion:touchAnchorId="@+id/iv"
        motion:touchAnchorSide="right"
        motion:dragDirection="dragRight" />
</Transition>

<ConstraintSet android:id="@+id/start">
    <Constraint
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        motion:layout_constraintBottom_toBottomOf="parent"
        motion:layout_constraintStart_toStartOf="parent"
        motion:layout_constraintTop_toTopOf="parent"

        motion:attributeName="BackgroundColor"
        motion:customColorValue="#D81B60" />
</ConstraintSet>

<ConstraintSet android:id="@+id/end">

    <Constraint
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        motion:layout_constraintBottom_toBottomOf="parent"
        motion:layout_constraintEnd_toEndOf="parent"
        motion:layout_constraintTop_toTopOf="parent"

        motion:attributeName="BackgroundColor"
        motion:customColorValue="#9999FF"
        />


</ConstraintSet>

No error,but it doesn't work..

[zhangqifan1]

I m so sorry. I didn't see it until today

<Constraint
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
motion:layout_constraintBottom_toBottomOf="parent"

        motion:layout_constraintStart_toStartOf="parent"
        motion:layout_constraintTop_toTopOf="parent" >

        <CustomAttribute
            motion:attributeName="BackgroundColor"
            motion:customColorValue="#D81B60"
            />
    </Constraint>
</ConstraintSet>