NestedScrollView Having Constraint Layout not scrolling

Question

My xml is composed by one constraint layout. Inside this there are 2 buttons and 1 nested scroll view. Inside the ScrollView there are various elements including recycle view. I would like that the recycle view not scroll but scroll only the nested scroll view. I have disabled the scroll of recycle view in this mode (recyclerView.setNestedScrollingEnabled(false);) but the problem is that the nested scroll view not scrolling. Can you help me? I attach the code below.

The code start in this mode :

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

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

    <TextView
    android:id="@+id/azzera"
    android:layout_width="120dp"
    android:layout_height="40dp"
    android:layout_marginStart="40dp"
    android:layout_marginBottom="28dp"
    android:background="@drawable/rounded_4lati"
    android:backgroundTint="@color/azzurro"
    android:elevation="@dimen/dimen8"
    android:paddingTop="@dimen/dimen8"
    android:text="@string/azzera"
    android:textAlignment="center"
    android:textColor="#FFFFFF"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent" />

<TextView
    android:id="@+id/conferma"
    android:layout_width="120dp"
    android:layout_height="40dp"
    android:layout_marginEnd="16dp"
    android:layout_marginBottom="28dp"
    android:background="@drawable/rounded_4lati"
    android:backgroundTint="@color/azzurro"
    android:paddingTop="@dimen/dimen8"
    android:text="@string/conferma"
    android:textAlignment="center"
    android:textColor="#FFFFFF"
    android:elevation="@dimen/dimen8"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent" />

<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    >

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <View
            android:id="@+id/view1"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:background="@color/white"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <View
            android:id="@+id/view2"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:layout_marginTop="16dp"
            android:background="@color/white"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/view1" />

        <View
            android:id="@+id/view3"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:layout_marginTop="16dp"
            android:background="@color/white"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/view2" />

        <TextView
            android:id="@+id/mostraPreferiti"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="8dp"
            android:text="@string/mostraPreferiti"
            android:textColor="@color/black"
            android:textSize="18sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/view3" />

        <TextView
            android:id="@+id/creditiEcm"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="10dp"
            android:text="@string/creditiECM"
            android:textColor="@color/black"
            android:textSize="18sp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/view1" />

        <EditText
            android:id="@+id/editText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:inputType="number"
            android:hint="@string/zero"
            android:text="@string/editText"
            android:textStyle="bold"
            app:layout_constraintStart_toEndOf="@+id/creditiEcm"
            app:layout_constraintTop_toTopOf="@+id/view1"
            android:autofillHints="" />

        <Button
            android:id="@+id/buttonMeno"
            android:layout_width="36dp"
            android:layout_height="36dp"
            android:layout_marginTop="6dp"
            android:layout_marginEnd="16dp"
            android:background="@drawable/ic_remove_circle_azzurro_24dp"
            android:gravity="center"
            android:textAlignment="gravity"
            android:textColor="@color/azzurro"
            android:textSize="24sp"
            app:layout_constraintEnd_toStartOf="@+id/buttonPiu"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/buttonPiu"
            android:layout_width="36dp"
            android:layout_height="36dp"
            android:layout_marginTop="6dp"
            android:layout_marginEnd="32dp"
            android:background="@drawable/ic_add_circle_azzurro_24dp"
            android:gravity="center"
            android:textAlignment="gravity"
            android:textColor="@color/azzurro"
            android:textSize="24sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/mostraCorsiPassati"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="8dp"
            android:text="@string/mostraCorsiPassati"
            android:textColor="@color/black"
            android:textSize="18sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/view2"
            app:layout_constraintTop_toTopOf="@+id/view2" />


        <Switch
            android:id="@+id/switch_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="32dp"
            android:theme="@style/SwitchTheme"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@+id/view2" />

        <Switch
            android:id="@+id/switch_button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="32dp"
            android:theme="@style/SwitchTheme"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@+id/view3" />

        <android.support.v7.widget.AppCompatTextView
            android:id="@+id/professioni"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="90dp"
            android:layout_marginEnd="8dp"
            android:text="@string/professione2"
            android:textColor="@color/black"
            android:textSize="18sp"
            android:textStyle="bold"
            app:fontFamily="@font/sanfrancisco"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/mostraCorsiPassati" />


        <SearchView
            android:id="@+id/searchBar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:background="#fff"
            android:elevation="2dp"
            app:layout_constraintHorizontal_bias="0.557"
            app:layout_constraintLeft_toRightOf="parent"
            app:layout_constraintRight_toLeftOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/professioni"
            app:queryHint="Cerca..">

        </SearchView>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/listProfessioni"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/searchBar"
            android:orientation="vertical"
            >


        </android.support.v7.widget.RecyclerView>



        <TextView
            android:id="@+id/professioniNonDisponibili"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="8dp"
            android:text="@string/professioniNonDisponibili"
            android:textAlignment="center"
            android:textColor="@color/gray"
            android:textSize="18sp"
            app:autoSizeMaxTextSize="@dimen/dimen20"
            app:autoSizeMinTextSize="@dimen/dimen12"
            app:autoSizeTextType="uniform"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="1.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/error" />

        <ImageView
            android:id="@+id/error"
            android:layout_width="@dimen/dimen80"
            android:layout_height="@dimen/dimen80"
            android:layout_marginStart="8dp"
            android:layout_marginTop="32dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="8dp"
            android:background="@drawable/ic_error_outline_gray_24dp"
            android:contentDescription="@string/TODO"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/searchBar"
            app:layout_constraintVertical_bias="0.105" />


        <ProgressBar
            android:id="@+id/progress"
            android:layout_width="60dp"
            android:layout_height="60dp"

            android:layout_marginStart="8dp"
            android:layout_marginTop="24dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="8dp"
            android:alpha="1"
            android:minWidth="80dp"
            android:minHeight="80dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/searchBar"
            app:layout_constraintVertical_bias="0.168" />

    </android.support.constraint.ConstraintLayout>


</android.support.v4.widget.NestedScrollView>

Answer 1

As i answered in comments

For Someone other facing same problem. This might help.

For some reasons ScrollView doesn't scroll when having ConstraintLayout inside it.

For Workaround we can use LinearLayout or RelativeLayoutinstead of ConstraintLayout inside ScrollView. OR

As OP does put the ConstraintLayout inside Linear or Relative Layout does the trick.

Answer 2

According to Ali Ahmed's answer, a ScrollView doesn't scroll if you have a ConstraintLayout inside it. Well that's not true. I have been using ConstraintLayout inside ScrollView and everything works perfectly fine. Well the problem with the code that you posted is that you are using 0dpas the layout_height of your RecyclerView. 0dp means match_parent. You should be using wrap_content as your layout_height. So that the RecyclerView expands its height according to the elements in it. Doing so will make your code work fine.