ScrollView/NestedScrollView中的RecyclerView无法正确滚动 [英] RecyclerView inside a ScrollView/NestedScrollView does not scroll properly

问题描述

我有一个布局，该布局具有一个 CardView 和一个与其关联的 FloatingActionButton .在 CardView (这是 RecyclerView )下方有一个答复列表.有时 CardViews'的高度大于屏幕的高度，所以我对 CardView 使用了 layout_height ="wrap_content" 并包装了整个 ScrollView 中的> LinearLayout .

但是，这会导致在滚动 RecyclerView 的项目时出现问题(因为它是 ScrollView 内部的滚动视图).正如某些

解决方案

在布局中有多个滚动视图(例如RecyclerView + ScrollView)时，以及在recyclerView中滚动时，recyclerView会与父级Scrollview一起滚动.这会在RecyclerView中引起抖动.您可以通过以下方法避免这种抖动.

您可以添加
android:nestedScrollingEnabled ="false"到 XML 或
recyclerView.setNestedScrollingEnabled(false);到 Java 中的RecyclerView.

I have a layout which has a CardView and a FloatingActionButton associated with it. There is a list of replies below the CardView (which is a RecyclerView). Sometimes the CardViews' height is greater than the screen, so I have used layout_height="wrap_content" for the CardView and wrapped the whole LinearLayout inside a ScrollView.

However, this causes a problem(since it is a scrolling view inside a ScrollView) while scrolling the items of the RecyclerView. As suggested in some of the questions and answers posted, I have used both the NestedScrollView and the android:nestedScrollingEnabled="true" tag but the scrolling in the RecyclerView is still bad.

Here is my Layout file -

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    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="com.example.forum.reply.ReplyActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <android.support.v7.widget.Toolbar
            android:id="@+id/reply_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?attr/colorPrimary"
            android:minHeight="?attr/actionBarSize"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:titleTextColor="@android:color/white"/>

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:nestedScrollingEnabled="true"
            android:fillViewport="true">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="8dp"
                android:orientation="vertical">

                <android.support.v7.widget.CardView
                    android:id="@+id/topic_card"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:paddingBottom="@dimen/card_margin"
                    android:paddingLeft="@dimen/card_margin"
                    android:paddingRight="@dimen/card_margin"
                    android:paddingTop="@dimen/card_margin">

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:paddingEnd="@dimen/card_margin"
                        android:paddingStart="@dimen/card_margin">

                        <android.support.v7.widget.AppCompatTextView
                            android:id="@+id/topic_title"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:layout_marginBottom="8dp"
                            android:layout_marginTop="8dp"
                            android:textAppearance="@style/TextAppearance.AppCompat.Title"/>

                        <android.support.v7.widget.AppCompatTextView
                            android:id="@+id/topic_content"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:textAppearance="@style/TextAppearance.AppCompat.Body1"/>
                    </LinearLayout>
                </android.support.v7.widget.CardView>

                <ProgressBar
                    android:id="@+id/reply_progressbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:indeterminate="true"
                    android:visibility="visible"/>

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/list_of_replies"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="invisible"/>
            </LinearLayout>
        </ScrollView>
    </LinearLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/reply_to_topic"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:clickable="true"
        android:src="@drawable/ic_reply_white_24dp"
        app:layout_anchor="@id/topic_card"
        app:layout_anchorGravity="bottom|right|end"/>

</android.support.design.widget.CoordinatorLayout>

Here are some images -

解决方案

When you have multiple scrolling Views in your layout (eg. RecyclerView + ScrollView) and when you scroll while in your recyclerView, the recyclerView scrolls with the parent Scrollview. this causes jitters in RecyclerView. You can avoid this jitter by the following.

You can add
android:nestedScrollingEnabled="false" to your RecyclerView in XML or
recyclerView.setNestedScrollingEnabled(false); to your RecyclerView in Java.

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