滚动视图中的 Android 列表视图 [英] Android list view inside a scroll view

问题描述

我有一个 android 布局，它有一个 scrollView，里面有许多元素.在 scrollView 的底部，我有一个 listView 然后由适配器填充.

I have an android layout which has a scrollView with a number of elements with in it. At the bottom of the scrollView I have a listView which is then populated by an adapter.

我遇到的问题是，android 从 scrollView 中排除了 listView，因为 scrollView 已经有一个可滚动的功能.我希望 listView 与内容一样长，并且主滚动视图可以滚动.

The problem that I am experiencing, is that android is excluding the listView from the scrollView as the scrollView already has a scroll-able function. I want the listView to be as long as the content is and for the master scroll view to be scroll-able.

我怎样才能实现这种行为?

How can I achieve this behavior?

这是我的主要布局:

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="2"
    android:fillViewport="true"
    android:gravity="top" >

    <LinearLayout
        android:id="@+id/foodItemActvity_linearLayout_fragments"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
    </LinearLayout>

</ScrollView>

然后我以编程方式将我的组件添加到带有 id 的线性布局:foodItemActvity_linearLayout_fragments.下面是加载到该线性布局中的视图之一.这是给我卷轴带来麻烦的那个.

I then programmatically add my components to the linearlayour with the id: foodItemActvity_linearLayout_fragments. Below is one of the views that is loaded into that linearlayout. This is the one giving me trouble with the scrolls.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <TextView
       android:id="@+id/fragment_dds_review_textView_label"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="Reviews:"
       android:textAppearance="?android:attr/textAppearanceMedium" />

   <ListView
       android:id="@+id/fragment_dds_review_listView"
       android:layout_width="match_parent"
       android:layout_height="wrap_content">
   </ListView>
</LinearLayout>

然后我的适配器填满了这个列表视图.

My adapter then fills up this list view.

这是当我单击主滚动视图时来自 android 层次结构查看器的图像:

Here is an image from the android hierarchy viewer when I click on the master scrollView:

如您所见，它不包括评论列表视图.

As you can see, it is excluding the reviews listView.

我应该能够向下滚动页面并看到 8 条评论，但它只显示了那 3 条，我可以滚动评论所在的小部分.我想要一个全局页面滚动

I should be able to scroll the page down and see 8 reviews, but instead it only shows me those 3, and I can scroll on the tiny part where the reviews are. I want a global page scroll

推荐答案

对于在 ScrollView 内滚动的任何子视图.ListView、RecyclerView 等任何东西.您只需将 ScrollView 替换为 androidx.core.widget.NestedScrollView 在您当前的 xml 中，然后魔术就会发生.

For any Child view to scroll inside a ScrollView. Anything like ListView, RecyclerView, etc. You just have to replace ScrollView with androidx.core.widget.NestedScrollView in your current xml and then magic happens.

下面是一个示例 xml 代码:

Below is a sample xml code :

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

    <androidx.appcompat.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="16dp"
        android:paddingBottom="20dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Recycler View inside a Scroll View"
            android:textColor="@color/black"
            android:textSize="@dimen/_20sp"
            android:textStyle="bold" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="Below is a Recycler View as an example."
            android:textSize="16sp" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            app:layout_constraintTop_toBottomOf="@id/et_damaged_qty" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="This textview automatically goes below the Recycler View."
            android:textSize="16sp" />
    </androidx.appcompat.widget.LinearLayoutCompat>
</androidx.core.widget.NestedScrollView>

现在，您可以摆脱为解决嵌套滚动而采取的所有丑陋技巧.

这篇关于滚动视图中的 Android 列表视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！