java.lang.IllegalStateException：RecyclerView在片段没有布局管理 [英] java.lang.IllegalStateException: RecyclerView has no LayoutManager in Fragment

问题描述

我是在不断变化的活动变成一个片段的过程中，一旦得到了下面的错误，因为我夸大了RecyclerView。

  @覆盖
公共查看onCreateView（LayoutInflater充气，
          ViewGroup中的容器，包savedInstanceState）{

    ----＆GT;查看rootView = inflater.inflate（R.layout.layout_containing_recyclerview，
                    集装箱，假）;
 

  

java.lang.IllegalStateException：RecyclerView没有布局管理

在我改变了我的活动，以一个片段的充气去就好了。

一些进一步的研究表明的删除我所有的子元素的从recyclerview布局帮助解决问题。不过，我不明白为什么这会改变什么，以及为什么它的工作的工作与活动之前。

和

 ＆LT; android.support.v7.widget.RecyclerView的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    的xmlns：工具=htt​​p://schemas.android.com/tool​​s
    机器人：ID =@ + ID / my_recycler_view
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：可点击=真
    机器人：滚动条=垂直＆GT;

＆LT; /android.support.v7.widget.RecyclerView>
 

不工作

 ＆LT; android.support.v7.widget.RecyclerView的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    的xmlns：工具=htt​​p://schemas.android.com/tool​​s
    机器人：ID =@ + ID / my_recycler_view
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：可点击=真
    机器人：滚动条=垂直＆GT;


＆LT;查看
    机器人：ID =@ + ID / randomview
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_gravity =中心/＆GT;

＆LT; /android.support.v7.widget.RecyclerView>
 

什么我很想念在这里？

解决方案

我最终只是膨胀的意见之后是这样的：

  @覆盖
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
    查看rootView = inflater.inflate（R.layout.fragment_catalog_viewer，集装箱，假）;
    recyclerView =（RecyclerView）rootView.findViewById（R.id.my_recycler_view）;
    getLayoutInflater（savedInstanceState）.inflate（R.layout.catalog_child，集装箱）;
    返回rootView;
}
 

I was in the process of changing an Activity into a Fragment and got the following error as soon as I inflated the RecyclerView.

@Override
public View onCreateView(LayoutInflater inflater, 
          ViewGroup container, Bundle savedInstanceState) {

    ----> View rootView = inflater.inflate(R.layout.layout_containing_recyclerview, 
                    container, false); 

java.lang.IllegalStateException: RecyclerView has no LayoutManager

Before I changed my Activity to a Fragment the inflate went just fine.

Some further research showed that removing all my child elements from the recyclerview layout helped solve the problem. However I do not understand why that would change anything and why it did work work with an activity before.

WORKS

<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/my_recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"   
    android:scrollbars="vertical" >    

</android.support.v7.widget.RecyclerView>

DOES NOT WORK

<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/my_recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"   
    android:scrollbars="vertical" >    


<View
    android:id="@+id/randomview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center" />

</android.support.v7.widget.RecyclerView>

Anything I am missing here?

解决方案

I ended up just inflating the views afterwards like this:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {      
    View rootView = inflater.inflate(R.layout.fragment_catalog_viewer, container, false);
    recyclerView = (RecyclerView)rootView.findViewById(R.id.my_recycler_view);
    getLayoutInflater(savedInstanceState).inflate(R.layout.catalog_child, container);        
    return rootView;
}

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