如何使用RecyclerView显示沿滚动条移动的文本? [英] How to show text that moves along scrollbar using RecyclerView?

问题描述

我正在使用Recylerview，并且想要显示这样的列表 https://i.stack .imgur.com/kMh1q.png
我试图按如下所示在xml中启用fastScroll，但是它只能更改Recyclerview的缩略图和轨迹，并且无法按预期显示文本.

I'm using Recylerview and want to show list like this https://i.stack.imgur.com/kMh1q.png
I've tried to enable fastScroll in xml as below however it only can change thumb and track of Recyclerview and can't show the text as I expected.

 <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scrollbars="vertical"
            app:fastScrollEnabled="true"
            app:fastScrollHorizontalThumbDrawable="@drawable/thumb_drawable"
            app:fastScrollHorizontalTrackDrawable="@drawable/line_drawable"
            app:fastScrollVerticalThumbDrawable="@drawable/thumb_drawable"
            app:fastScrollVerticalTrackDrawable="@drawable/line_drawable"/>

我正在Recyclerview中寻找类似于fastScrollTextColor和fastScrollPreviewBackgroundRight的属性，以沿滚动条显示文本，如本例所示 http://androidopentutorials.com/android-listview-fastscroll/，但是RecyclerView似乎不支持这些内容
在该示例中，使用ListView代替，并且可以将这些属性声明为ListView的样式

I'm looking for attributes similar to fastScrollTextColor and fastScrollPreviewBackgroundRight in Recyclerview to shows text along scrollbar like in this example http://androidopentutorials.com/android-listview-fastscroll/ but it seem that RecyclerView doesn't support those
In that example uses ListView instead and these attributes can be declare in as styles of ListView

<style name="FastScrollStyle" parent="AppBaseTheme">
        <item name="android:fastScrollThumbDrawable">@drawable/fastscroll_thumb_holo</item>
        <item name="android:fastScrollOverlayPosition">atThumb</item>
        <item name="android:fastScrollTextColor">@color/apptheme_color</item>
        <item name="android:fastScrollTrackDrawable">@drawable/fastscroll_thumb_pressed_holo</item>
        <item name="android:fastScrollPreviewBackgroundRight">@drawable/bg_default_focused_holo_light</item>
    </style>

任何人都可以使用RecyclerView来帮助我吗?谢谢！

Anyone can help me do so with RecyclerView? Thanks!

推荐答案

github上有一个用于此目的的库: https://github.com/viethoa/recyclerview-alphabet-fast-scroller- android

There's a library on github made for this purpose: https://github.com/viethoa/recyclerview-alphabet-fast-scroller-android

我还找到了一个实现它的项目: https://github.com/codexpedia/android_fast_scroll_with_alphabet/tree/master/fast_scroll_with_alphabet2

And I also found a project implementing it: https://github.com/codexpedia/android_fast_scroll_with_alphabet/tree/master/fast_scroll_with_alphabet2

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