NestedScrollView 具有约束布局不滚动

NestedScrollView Having Constraint Layout not scrolling

我的xml是由一个约束布局组成的。这里面有 2 个按钮和 1 个嵌套的滚动视图。在 ScrollView 中有各种元素,包括回收视图。我希望回收视图不滚动,而只滚动嵌套的滚动视图。我在这种模式下禁用了回收视图的滚动 (recyclerView.setNestedScrollingEnabled(false);) 但问题是嵌套滚动视图不滚动。你能帮助我吗? 我附上下面的代码。

代码以这种模式开始:

<?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>

正如我在评论中回答的那样

对于其他面临同样问题的人。这可能会有所帮助。

由于某些原因,ScrollView 在其中包含 ConstraintLayout 时不会滚动。

对于解决方法,我们可以使用 LinearLayoutRelativeLayout 而不是 ScrollView 中的 ConstraintLayout。或者

正如 OP 确实将 ConstraintLayout 放在 Linear or Relative Layout 中一样。

根据 Ali Ahmed 的回答,如果里面有 ConstraintLayoutScrollView 不会滚动。那不是真的。我一直在 ScrollView 中使用 ConstraintLayout 并且一切正常。那么您发布的代码的问题是您使用 0dp 作为 RecyclerViewlayout_height0dp 表示 match_parent。您应该使用 wrap_content 作为您的 layout_height。这样 RecyclerView 就可以根据其中的元素扩展它的高度。这样做会使您的代码正常工作。