Resources$NotFoundException: Unable to find resource ID #0xffffffff using NestedScrollView with Motionlayout

Question

When using a NestedScrollView in combination with Motionlayout, I get the above written error. The strange thing here is, that this error ONLY HAPPENS, when the Nestedscrollview has some items in it (Constraintlayout or textview, button, edittext etc) AND when I try to move the NestedScrollView up.

Using a ScrollView solves this problem, but then the scrolling doesn't work...

BaseXML (for MotionLayout)

<layout 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">

    <data>
        <variable
            name="product"
            type="com.example.app.framework.datasource.models.product.Product" />
    </data>

    <androidx.constraintlayout.motion.widget.MotionLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layoutDescription="@xml/shop_item_content_scene"
        app:showPaths="true"
        tools:context=".framework.ui.view.fragments.shop.ShopItemFragment">

        <com.google.android.material.appbar.MaterialToolbar
            android:id="@+id/shop_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Light"
            app:menu="@menu/shop_item_toolbar"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <ImageView
            android:id="@+id/product_image"
            android:layout_width="0dp"
            android:layout_height="142dp"
            android:layout_marginStart="72dp"
            android:layout_marginTop="@dimen/standard8dpMargin"
            android:layout_marginEnd="72dp"
            android:adjustViewBounds="true"
            android:background="@color/color_white"
            android:contentDescription="@null"
            android:fitsSystemWindows="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/shop_toolbar"
            tools:src="@drawable/ic_example_logo" />

        <com.google.android.material.textview.MaterialTextView
            android:id="@+id/product_name"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/big16dpMargin"
            android:layout_marginBottom="12dp"
            android:ellipsize="end"
            android:fontFamily="sans-serif-medium"
            android:maxLines="2"
            android:text="@{product.name}"
            android:textAlignment="textStart"
            android:textColor="@color/color_text_dark"
            android:textSize="@dimen/textHeadlineNormal1"
            app:layout_constraintBottom_toTopOf="@id/scrollview_shop"
            app:layout_constraintEnd_toEndOf="@id/barrier"
            app:layout_constraintStart_toStartOf="@id/margin_left"
            app:layout_constraintTop_toBottomOf="@+id/product_image"
            tools:text="This is a long text to test ellipsize" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_shop"
            style="@style/Widget.MaterialComponents.Button.Icon"
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:layout_marginEnd="16dp"
            android:backgroundTint="@color/color_btn_blue"
            android:insetLeft="0dp"
            android:insetTop="0dp"
            android:insetRight="0dp"
            android:insetBottom="0dp"
            android:padding="0dp"
            app:icon="@drawable/ic_shopping_cart_filled"
            app:iconGravity="textStart"
            app:iconPadding="0dp"
            app:layout_constraintBottom_toTopOf="@id/scrollview_shop"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@id/scrollview_shop"
            app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlay.example.Button.Circle" />

        <include
            android:id="@+id/scrollview_shop"
            layout="@layout/shop_item_scroll"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:prod="@{product}"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/product_name" />

        <androidx.constraintlayout.widget.Barrier
            android:id="@+id/barrier"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:barrierDirection="left"
            app:constraint_referenced_ids="btn_shop" />

        <androidx.constraintlayout.widget.Guideline
            android:id="@+id/margin_left"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="@dimen/big16dpMargin" />


    </androidx.constraintlayout.motion.widget.MotionLayout>
</layout>

NestedScrollViewXML

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>
        <variable
            name="prod"
            type="com.example.app.framework.datasource.models.product.Product" />
    </data>

    <androidx.core.widget.NestedScrollView
        android:id="@+id/scrollable"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:background="@color/color_shop_item_background">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/product_article_number"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/standard8dpMargin"
                android:text="FISCH123"
                android:textAlignment="textStart"
                android:textColor="@color/color_text_gray"
                android:textDirection="locale"
                android:textSize="@dimen/textDescriptionNormal2"
                android:textStyle="normal"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                tools:text="PRICE" />

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/tv_mwst_disclaimer"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/standard8dpMargin"
                android:text="SEIFE123"
                android:textAlignment="textStart"
                android:textColor="@color/color_text_mwst"
                android:textDirection="locale"
                android:textSize="@dimen/textDescriptionNormal4"
                android:textStyle="italic"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/product_article_number"
                tools:text="PRICE" />
        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.core.widget.NestedScrollView>
</layout>

ContentScence XML

<?xml version="1.0" encoding="utf-8"?>
<MotionScene xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:motion="http://schemas.android.com/tools">

    <Transition
        app:constraintSetEnd="@id/collapsed"
        app:constraintSetStart="@id/expanded">

        <OnSwipe
            motion:dragDirection="dragUp"
            app:onTouchUp="stop"
            motion:touchAnchorId="@id/scrollview_shop"
            motion:touchAnchorSide="top" />

        <KeyFrameSet>
            <KeyAttribute
                app:motionTarget="@id/product_image"
                app:framePosition="40"
                android:alpha="0.0" />
        </KeyFrameSet>
    </Transition>

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

    <ConstraintSet android:id="@+id/collapsed">
        <Constraint
            android:id="@id/product_image"
            android:layout_height="?attr/actionBarSize"
            android:layout_marginStart="56dp"
            android:layout_marginEnd="56dp"
            android:alpha="0.0"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Constraint
            android:id="@id/product_name"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="56dp"
            android:layout_marginEnd="@dimen/standard8dpMargin"
            android:scaleX="0.925"
            android:scaleY="0.925"
            app:layout_constraintBottom_toBottomOf="@id/shop_toolbar"
            app:layout_constraintTop_toTopOf="@id/shop_toolbar"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="@id/barrier" />

        <Constraint
            android:id="@id/btn_shop"
            android:layout_marginEnd="@dimen/big16dpMargin"
            android:layout_width="56dp"
            android:layout_height="56dp"
            app:layout_constraintBottom_toBottomOf="@id/shop_toolbar"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/product_name" />
    </ConstraintSet>

</MotionScene>

Fragment

class ShopItemFragment : Fragment(R.layout.fragment_shop_item) {
    private val productArgs by navArgs<ShopItemFragmentArgs>()

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return FragmentShopItemBinding.inflate(inflater, container, false).apply {
            product = productArgs.product
        }.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        initToolbar()
    }

    private fun initToolbar() = with(shop_toolbar) {
        setupWithNavController(findNavController(), AppBarConfiguration(findNavController().graph))
    }
}

Stacktrace

E/com.example.ap: No package ID ff found for ID 0xffffffff.
E/InputEventReceiver: Exception dispatching input event.
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.app, PID: 17221
    android.content.res.Resources$NotFoundException: Unable to find resource ID #0xffffffff
        at android.content.res.ResourcesImpl.getResourceName(ResourcesImpl.java:276)
        at android.content.res.Resources.getResourceName(Resources.java:2064)
        at androidx.constraintlayout.motion.widget.MotionLayout.getAnchorDpDt(MotionLayout.java:3572)
        at androidx.constraintlayout.motion.widget.TouchResponse.scrollMove(TouchResponse.java:373)
        at androidx.constraintlayout.motion.widget.MotionScene.processScrollMove(MotionScene.java:1347)
        at androidx.constraintlayout.motion.widget.MotionLayout.onNestedPreScroll(MotionLayout.java:2500)
        at androidx.core.view.ViewParentCompat.onNestedPreScroll(ViewParentCompat.java:386)
        at androidx.core.view.NestedScrollingChildHelper.dispatchNestedPreScroll(NestedScrollingChildHelper.java:322)
        at androidx.core.widget.NestedScrollView.dispatchNestedPreScroll(NestedScrollView.java:254)
        at androidx.core.widget.NestedScrollView.onTouchEvent(NestedScrollView.java:888)
        at android.view.View.dispatchTouchEvent(View.java:13415)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3054)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2741)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3060)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2755)
        at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:465)
        at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1849)
        at android.app.Activity.dispatchTouchEvent(Activity.java:3993)
        at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
        at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:423)
        at android.view.View.dispatchPointerEvent(View.java:13674)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5482)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5285)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4841)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4807)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4947)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4815)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5004)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4841)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4807)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4815)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7505)
        at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7474)
        at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7435)
        at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7630)
        at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:188)
        at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
        at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:178)
        at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7581)
        at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7654)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
        at android.view.Choreographer.doCallbacks(Choreographer.java:790)
        at android.view.Choreographer.doFrame(Choreographer.java:718)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

Pictures (with ScrollView, but Scrolling doesn't work)

• Expanded

• Collapsed

Answer 1

Okay, I've solved my issue. There were two problems: My colors and my layout id's.

First I've deleted every custom black and white color and used @android:color/white and @android:color/black. Second, I've given EVERY layout (constraintlayout, my motionlayout, textview etc) a CUSTOM ID.

The scrolling behavior now works, the only problem I have is, that I get W/MotionLayout: WARNING could not find view id -1 and that scrolling is really laggy. Will open another question for this error.