ScrollView内的RecyclerView，未显示某些项目 [英] RecyclerView inside ScrollView, some items are not shown

问题描述

我在ScrollView中有一个这样的RecyclerView:

I had a RecyclerView in ScrollView like this:

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!--other stuff-->

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

        <android.support.v7.widget.RecyclerView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="gone"/>

    </LinearLayout>

    <!--other stuff-->

</ScrollView>

RecyclerView的项是RelativeLayout，其中有一个EditText和其他视图.该RelativeLayout和EditText的layout_height均为wrap_content.用户可以输入EditText而不受长度/线的限制，从而使每个项目的高度都不同.

And the RecyclerView's item is a RelativeLayout, inside of which there is an EditText and other views. The layout_height of that RelativeLayout and EditText is both wrap_content. User can input into that EditText without any limit of length/lines so that each item's height is different.

然后我发现Adapter中的getItemCount()返回真实值，但是onBindViewHolder()被调用错误的时间(少于应该的时间)，因此不足以显示所有项目.

Then I found that getItemCount() in Adapter returns true value but onBindViewHolder() is called of wrong times(less than it should be), thus not enough to show all items.

我发现只有当我写recyclerView.setNestedScrollingEnabled(false)时，这种情况才会发生.但我无法删除此行.因为如果这样做，RecyclerView将无法平滑滚动，并且与ScrollView和ScrollView本身内部的其他视图不协调.

I found that this will happen only if I wrote recyclerView.setNestedScrollingEnabled(false). But I cannot remove this line. Because if I did so, the RecyclerView won't scroll smoothly and is not harmonious with other views inside ScrollView and ScrollView itself.

这在6.0上发生，但在4.1上没有发生.

This occurs on 6.0 but not on 4.1.

我在以下页面上与Google进行了交流: https://code. google.com/p/android/issues/detail?id=213914 ，他告诉我这是RecyclerView的错误修复.您可以访问该页面，以便更好地理解问题和我的目标(这里有一个小的示例项目来显示问题).我什至现在都不同意他的观点，我想解决这个问题.请帮忙，谢谢您.

I communicated with Google at this page: https://code.google.com/p/android/issues/detail?id=213914 and he told me this is a bug fix for RecyclerView. You can visit that page so that you can understand the question and my goal better(There is a small sample project to show the problem there). I don't agree with him even now and I want to solve the problem. Please help, thank you in advance.

推荐答案

我自己找到了解决方案:用NestedScrollView替换ScrollView并保留recyclerView.setNestedScrollingEnabled(false).我不知道这是否是NestedScrollView的目的，但它可以工作.

I found the solution myself: replace ScrollView with NestedScrollView and keep recyclerView.setNestedScrollingEnabled(false). I don't know if this is what NestedScrollView is made for but it works.

注意:

1. NestedScrollView不是ScrollView的子级，而是FrameLayout的子级.
2. 此解决方案还会通过自模拟adjustResize带来一些错误.

1. NestedScrollView is not a child of ScrollView but of FrameLayout.
2. This solution will also bring some bugs with self-simulated adjustResize.

这篇关于ScrollView内的RecyclerView，未显示某些项目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！