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CardView 内的 NestedScrollView 不滚动

[英]NestedScrollView inside CardView not scrolling

 原文  2021-03-13 18:05:41  4   1    android/ android-layout/ android-constraintlayout

问题描述

In my cardview layout I've placed one Constraint Layout in which's NestedScrollView that isn't scrolling.在我的卡片视图布局中，我放置了一个不滚动的 NestedScrollView 约束布局。 I've searched Stack Overflow, nothing works.我搜索了堆栈溢出，没有任何效果。 This cardView layout is later placed in RecyclerView, if that matters.这个 cardView 布局稍后会放在 RecyclerView 中，如果这很重要的话。 Below I launch also blueprint of layout.下面我还推出了布局蓝图。 Only part of it is shown in recycler view, where user click's Floating Action Button view is expanding.只有一部分显示在回收器视图中，用户单击的浮动操作按钮视图正在展开。 Where's problem?哪里有问题？

<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_margin="10dp"
    android:layout_height="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/main_cardview"
        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_toTopOf="parent">



        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/entire_card_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="@+id/main_cardview">

            <!--This is a ConstraintLayout for the fixed portion
                of the CardView. The elements
                that lie within the fixed portion of the CardView
                can be constrained to this layout.-->

            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/fixed_container"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:background="@color/teal_700"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0">

                <com.google.android.material.floatingactionbutton.FloatingActionButton
                    android:id="@+id/fab_expand"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:background="#FFFFFF"
                    android:backgroundTint="@color/white"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintHorizontal_bias="0.954"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintVertical_bias="0.888"
                    app:srcCompat="@drawable/ic_baseline_expand_more_24" />
            </androidx.constraintlayout.widget.ConstraintLayout>

            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/hidden_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:visibility="gone"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintTop_toBottomOf="@id/fixed_container"
                tools:visibility="visible">

                <androidx.core.widget.NestedScrollView
                    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_constraintHorizontal_bias="0.0"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="parent">

                    <com.google.android.material.textview.MaterialTextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/lorem_ipsum_long" />


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

        </androidx.constraintlayout.widget.ConstraintLayout>


    </androidx.cardview.widget.CardView>


</androidx.constraintlayout.widget.ConstraintLayout>

Blueprint of layout:布局蓝图： 在此处输入图像描述

1 个解决方案

解决方案1
 1 已采纳  2021-03-15 13:19:07

应用程序 your code is working fine.你的代码工作正常。 modified a little bit.稍微修改了一下。 please check it.请检查一下。

<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_margin="10dp"
android:layout_height="wrap_content">

<androidx.cardview.widget.CardView
    android:id="@+id/main_cardview"
    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_toTopOf="parent">



    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/entire_card_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="@+id/main_cardview">

        <!--This is a ConstraintLayout for the fixed portion
            of the CardView. The elements
            that lie within the fixed portion of the CardView
            can be constrained to this layout.-->

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/fixed_container"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:background="@color/teal_700"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0">

            <com.google.android.material.floatingactionbutton.FloatingActionButton
                android:id="@+id/fab_expand"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="16dp"
                android:background="#FFFFFF"
                android:backgroundTint="@color/white"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.954"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.888"
                app:srcCompat="@drawable/ic_launcher_foreground"
                android:layout_marginRight="16dp"
                tools:ignore="VectorDrawableCompat" />
        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/hidden_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toBottomOf="@id/fixed_container"
            tools:visibility="visible">

            <androidx.core.widget.NestedScrollView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fillViewport="true"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="parent">
                    <com.google.android.material.textview.MaterialTextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:text="@string/lorem_ipsum_long"
                        android:layout_marginBottom="16dp"/>


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

    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.cardview.widget.CardView>


</androidx.constraintlayout.widget.ConstraintLayout>

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