Recycleview滚动到Nestedscrollview内部不起作用的位置 [英] Recycleview scroll to a position not working inside Nestedscrollview

问题描述

我已经在嵌套滚动视图中实现了recycleview.但是将视图循环滚动到位置方法无效.

I have implemented a recycleview inside a nested scroll view. But recycle view scroll to position methods are not working.

下面是我的示例代码

  <?xml version="1.0" encoding="utf-8"?>
  <android.support.v4.widget.NestedScrollView 
    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="wrap_content"
    android:paddingBottom="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

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


  <android.support.v7.widget.RecyclerView
      android:id="@+id/list_view"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

 </LinearLayout>

</android.support.v4.widget.NestedScrollView>

下面是滚动方法

RecyclerView.SmoothScroller smoothScroller = new LinearSmoothScroller(this) {
                @Override
                protected int getVerticalSnapPreference() {
                    return LinearSmoothScroller.SNAP_TO_START;
                }
            };
            smoothScroller.setTargetPosition(pos);
            recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);

推荐答案

这是我解决此问题的方式

This is how I resolve this issue

首先获取需要使用以下方法滚动的回收视图位置

first get recycle view position that need to scroll using below method

final float y = recyclerView.getChildAt(selectedItem.getPos()).getY();

然后将嵌套的滚动视图滚动到该位置
nestedScrollingView.post(new Runnable(){@Override公共无效run(){nestedScrollingView.fling(0);nestedScrollingView.smoothScrollTo(0，(int)y);}});

Then scroll nested scroll view to that position
nestedScrollingView.post(new Runnable() { @Override public void run() { nestedScrollingView.fling(0); nestedScrollingView.smoothScrollTo(0, (int) y); } });

别忘了在nestedscrollview上添加 android:fillViewport ="true"

Don't forget to add android:fillViewport="true" on nestedscrollview

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