RecyclerView 未在 NestedScrollView 中滚动

RecyclerView not scrolling inside NestedScrollView

提问人:Akrit Khanna 提问时间:12/3/2020 更新时间:12/3/2020 访问量:172

问:

我正在设计一个复杂的 UI,它有一个 NestedScrollView 作为父级,其中有一个 RecyclerView。现在的问题是我无法滚动 RecyclerView 中的项目。

我尝试过的事情

  • 将 ScrollView 替换为 NestedScrollView
  • 启用 android:fillViewport=“true”
  • 禁用 RecyclerView 的 NestedScrolling
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".screens.StudentPreview">

    <androidx.cardview.widget.CardView
        android:id="@+id/toolbarCV"
        android:layout_width="match_parent"
        android:layout_height="130dp"
        android:translationY="-45dp"
        app:cardCornerRadius="30dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#1641A2">

            <ImageView
                android:id="@+id/menuIV"
                android:layout_width="23dp"
                android:layout_height="23dp"
                android:layout_gravity="center"
                android:layout_marginStart="24dp"
                android:layout_marginLeft="24dp"
                android:src="@drawable/ic_home"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.7" />

            <TextView
                android:id="@+id/featureName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_weight="1"
                android:fontFamily="@font/poppins_light"
                android:text="Student Preview"
                android:textColor="#fff"
                android:textSize="22sp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.75" />


        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>

    <androidx.core.widget.NestedScrollView
        android:id="@+id/studentPreviewNSV"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginTop="90dp"
        android:fillViewport="true"
        android:visibility="gone"
        app:layout_constraintTop_toTopOf="parent"
        tools:visibility="visible">

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

            <androidx.cardview.widget.CardView
                android:id="@+id/avatarCV"
                android:layout_width="60dp"
                android:layout_height="60dp"

                app:cardBackgroundColor="@color/colorPrimaryDark"
                app:cardCornerRadius="40dp"
                app:cardElevation="0dp"
                app:layout_constraintBottom_toBottomOf="@+id/studentDetailsCL"
                app:layout_constraintEnd_toStartOf="@+id/studentDetailsCL"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintHorizontal_chainStyle="packed"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="@+id/studentDetailsCL">

                <ImageView
                    android:id="@+id/avatarIV"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:scaleType="centerCrop"
                    android:visibility="gone"
                    tools:src="@drawable/avatar_sample" />

                <TextView
                    android:id="@+id/nameInitialTV"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:fontFamily="@font/montserrat"
                    android:textColor="#FFF"
                    android:textSize="24sp"
                    android:textStyle="bold"
                    android:visibility="gone"
                    tools:text="AK"
                    tools:visibility="visible" />

            </androidx.cardview.widget.CardView>


            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/studentDetailsCL"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="8dp"
                android:layout_marginLeft="8dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toEndOf="@+id/avatarCV"
                app:layout_constraintTop_toTopOf="parent">

                <TextView
                    android:id="@+id/studentNameTV"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:fontFamily="@font/montserrat"
                    android:textColor="#000"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    tools:text="Akrit Khanna" />

                <TextView
                    android:id="@+id/classNameTV"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:fontFamily="@font/montserrat"
                    android:textColor="#000"
                    android:textSize="15sp"
                    app:layout_constraintStart_toStartOf="@+id/studentNameTV"
                    app:layout_constraintTop_toBottomOf="@+id/studentNameTV"
                    tools:text="Class 8th A" />

                <TextView
                    android:id="@+id/lastLoggedTV"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="1dp"
                    android:fontFamily="@font/raleway"
                    android:textColor="#000"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    app:layout_constraintStart_toStartOf="@+id/classNameTV"
                    app:layout_constraintTop_toBottomOf="@+id/classNameTV"
                    tools:text="Last Logged: 30-01-2020" />


            </androidx.constraintlayout.widget.ConstraintLayout>


            <androidx.cardview.widget.CardView
                android:id="@+id/classEnrollCV"
                android:layout_width="0dp"
                android:layout_height="120dp"
                android:layout_marginStart="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginEnd="5dp"
                android:layout_marginRight="5dp"
                app:cardBackgroundColor="#F5F5F5"
                app:cardCornerRadius="18dp"
                app:cardElevation="3dp"
                app:layout_constraintEnd_toStartOf="@+id/courseEnrollCV"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintHorizontal_chainStyle="packed"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="@+id/detailsGL">

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

                    <TextView
                        android:id="@+id/classEnrollCountTV"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:fontFamily="@font/raleway"
                        android:textColor="#000"
                        android:textSize="22sp"
                        android:textStyle="bold"
                        app:layout_constraintBottom_toTopOf="@+id/classEnrollTVContainerFL"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        tools:text="1" />

                    <FrameLayout
                        android:id="@+id/classEnrollTVContainerFL"
                        android:layout_width="match_parent"
                        android:layout_height="60dp"
                        android:background="#D0D9EC"
                        app:layout_constraintBottom_toBottomOf="parent">

                        <TextView
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_gravity="center"
                            android:fontFamily="@font/raleway"
                            android:text="Classes Enrolled"
                            android:textColor="#1641A2"
                            android:textSize="18sp" />


                    </FrameLayout>
                </androidx.constraintlayout.widget.ConstraintLayout>

            </androidx.cardview.widget.CardView>

            <androidx.cardview.widget.CardView
                android:id="@+id/courseEnrollCV"
                android:layout_width="0dp"
                android:layout_height="120dp"
                android:layout_marginStart="5dp"
                android:layout_marginLeft="5dp"
                android:layout_marginEnd="8dp"
                android:layout_marginRight="8dp"
                app:cardBackgroundColor="#F5F5F5"
                app:cardCornerRadius="18dp"
                app:cardElevation="3dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toEndOf="@+id/classEnrollCV"
                app:layout_constraintTop_toTopOf="@+id/detailsGL">

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

                    <TextView
                        android:id="@+id/courseEnrollCountTV"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:fontFamily="@font/raleway"
                        android:textColor="#000"
                        android:textSize="22sp"
                        android:textStyle="bold"
                        app:layout_constraintBottom_toTopOf="@+id/courseEnrollTVContainerFL"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        tools:text="1" />

                    <FrameLayout
                        android:id="@+id/courseEnrollTVContainerFL"
                        android:layout_width="match_parent"
                        android:layout_height="60dp"
                        android:background="#D0D9EC"
                        app:layout_constraintBottom_toBottomOf="parent">

                        <TextView
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_gravity="center"
                            android:fontFamily="@font/raleway"
                            android:text="Courses Enrolled"
                            android:textColor="#1641A2"
                            android:textSize="18sp" />


                    </FrameLayout>
                </androidx.constraintlayout.widget.ConstraintLayout>


            </androidx.cardview.widget.CardView>

            <androidx.constraintlayout.widget.Guideline
                android:id="@+id/detailsGL"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_constraintGuide_begin="90dp" />


            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/reportCL"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:background="#F5F5F5"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/classEnrollCV">

                <Spinner
                    android:id="@+id/classOrTermSpinner"
                    style="@style/Base.Widget.AppCompat.Spinner.Underlined"
                    android:layout_width="0dp"
                    android:layout_height="50dp"
                    android:layout_marginStart="16dp"
                    android:layout_marginLeft="16dp"
                    android:layout_marginEnd="8dp"
                    android:layout_marginRight="8dp"
                    app:layout_constraintEnd_toStartOf="@+id/courseSpinner"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintHorizontal_chainStyle="packed"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                <Spinner
                    android:id="@+id/courseSpinner"
                    style="@style/Base.Widget.AppCompat.Spinner.Underlined"
                    android:layout_width="0dp"
                    android:layout_height="50dp"
                    android:layout_marginStart="8dp"
                    android:layout_marginLeft="8dp"
                    android:layout_marginEnd="16dp"
                    android:layout_marginRight="16dp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.5"
                    app:layout_constraintStart_toEndOf="@+id/classOrTermSpinner"
                    app:layout_constraintTop_toTopOf="parent" />


                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/reportRV"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/courseSpinner" />


            </androidx.constraintlayout.widget.ConstraintLayout>


        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.core.widget.NestedScrollView>


</androidx.constraintlayout.widget.ConstraintLayout>

enter image description here

java android kotlin android-recycler查看

评论

0赞 Alex Rmcf 12/3/2020
我认为您可以尝试将 RecylerView ConstraintLayout 移动得更高一级
0赞 Akrit Khanna 12/3/2020
还是同样的问题@AlexRmcf
0赞 Alex Rmcf 12/3/2020
对不起,错了。我的意思是,您的回收器视图假定位于嵌套滚动视图之外

答:

0赞 MehranB 12/3/2020 #1

使用 a 并将其添加到 RecyclerView:NestedScrolView

recyclerView.setNestedScrollingEnabled(false);
recyclerView.setHasFixedSize(false);

或者这样对 XML 进行:

android:nestedScrollingEnabled="false"

此外,向 recyclerView 添加方向可能会有所帮助:

android:orientation="vertical"

评论

0赞 Akrit Khanna 12/3/2020
我已经以编程方式完成了此操作。但它仍然不起作用。
0赞 MehranB 12/3/2020
可能无关紧要,但会向 recyclerView 和 test 添加方向。
0赞 MehranB 12/3/2020
也可以试试这个: recyclerView.setHasFixedSize(false);
0赞 MehranB 12/3/2020
如果这些都不起作用。也许这会: stackoverflow.com/a/38995399/10695663
0赞 Akrit Khanna 12/3/2020
尝试设置 recyclerView.setHasFixedSize(false);但还没有成功。
0赞 Mrudul Tora 12/3/2020 #2

将内部存在的所有视图包装成一个 .例如,NestedScrollViewRelativeLayout

    <androidx.core.widget.NestedScrollView
        android:id="@+id/studentPreviewNSV"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginTop="90dp"
        android:fillViewport="true"
        android:visibility="gone"
        app:layout_constraintTop_toTopOf="parent"
        tools:visibility="visible">

       <RelativeLayout
           android:layout_width="match_parent"
           android:layout_height="wrap_content">

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

                <!-- your remaining code -->

            </androidx.constraintlayout.widget.ConstraintLayout>
       </RelativeLayout>
   </androidx.core.widget.NestedScrollView>

评论

0赞 Akrit Khanna 12/3/2020
还是同样的问题。
0赞 Akrit Khanna 12/3/2020 #3

我设法通过添加android:layout_marginBottom=“100dp”解决了这个问题,我认为这是因为我将android:layout_marginTop=“90dp”给了我的NestedScrollView,并且由于RecyclerView假设所有项目在屏幕上都可见,因此无需滚动。(如果我错了,请纠正我)

     <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/reportRV"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/courseSpinner"
                    tools:listitem="@layout/report_list_layout"
                    android:orientation="vertical"
                    android:layout_marginBottom="100dp"/>