我RecyclerView和项目已match_parent宽度，但其结果是：

 ＆LT;查看    类=android.support.v7.widget.RecyclerView    机器人：layout_width =match_parent 

和项目：

 ＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android的xmlns：工具=htt​​p://schemas.android.com/tool​​s的xmlns：FAB =htt​​p://schemas.android.com/apk/res-auto机器人：ID =@ + ID / ll_itm机器人：方向=横向机器人：layout_width =match_parent 

全：

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android的xmlns：工具=htt​​p://schemas.android.com/tool​​s的xmlns：FAB =htt​​p://schemas.android.com/apk/res-auto机器人：ID =@ + ID / ll_itm机器人：方向=横向机器人：layout_width =match_parent机器人：layout_height =WRAP_CONTENT机器人：weightSum =100机器人：重力=右＆GT;＆LT;按钮    机器人：layout_width =0dp    机器人：layout_weight =15    机器人：layout_height =FILL_PARENT    机器人：文字=ملاحظات    机器人：ID =@ + ID /键/＆GT;＆LT;的LinearLayout    机器人：layout_width =0dp    机器人：layout_height =FILL_PARENT    机器人：layout_weight =20    机器人：比重=中心    ＆GT;    ＆LT;的LinearLayout        机器人：layout_width =WRAP_CONTENT        机器人：layout_height =WRAP_CONTENT        机器人：方向=横向        ＆GT;        ＆LT; com.getbase.floatingactionbutton.FloatingActionButton            机器人：layout_width =FILL_PARENT            机器人：layout_height =FILL_PARENT            晶圆厂：fab_plusIconColor =＃ff56ff83            FAB：fab_colorNormal =@彩色/ d_red            FAB：fab_color pressed =＃ff5c86ff            FAB：fab_size =迷你            FAB：fab_icon =@绘制/ ic_remove_white            机器人：ID =@ + ID / fab_rmv/＆GT;        ＆LT; esfandune.ir.elmikarbordiardakan.other.CustomTxtView            机器人：layout_weight =25            机器人：layout_width =0dp            机器人：layout_height =FILL_PARENT            机器人：textAppearance =机器人：ATTR / textAppearanceLarge            机器人：文字=0            机器人：重力=右| center_vertical            机器人：ID =@ + ID / txt_takhir_itm/＆GT;        ＆LT; com.getbase.floatingactionbutton.FloatingActionButton            机器人：layout_width =FILL_PARENT            机器人：layout_height =FILL_PARENT            FAB：fab_plusIconColor =@彩色/ colorprimarylight            FAB：fab_colorNormal =@彩色/ colorprimarydark            FAB：fab_color pressed =@彩色/ colorprimary            FAB：fab_size =迷你            FAB：fab_icon =@绘制/ ic_add_white            机器人：ID =@ + ID / fab_add/＆GT;    ＆LT; / LinearLayout中＆GT;＆LT; / LinearLayout中＆GT;    ＆LT;微调        机器人：layout_width =0dp        机器人：layout_height =FILL_PARENT        机器人：layout_weight =10        机器人：ID =@ + ID / sp_nomre_itm        机器人：项=@阵列/度/＆GT;＆LT;的LinearLayout    机器人：layout_width =0dp    机器人：layout_height =FILL_PARENT    机器人：layout_weight =10    机器人：比重=中心    ＆GT;    ＆LT;！ -  LinearLayout中baraye INE科nameshod晶圆厂RO重量behosh爸爸 - ＆GT;    ＆LT; com.getbase.floatingactionbutton.FloatingActionButton        机器人：layout_width =FILL_PARENT        机器人：layout_height =FILL_PARENT        晶圆厂：fab_plusIconColor =＃ff56ff83        FAB：fab_colorNormal =@彩色/ d_green        FAB：fab_color pressed =@彩色/ d_orange        晶圆厂：fab_size =正常        FAB：fab_icon =@绘制/ ic_done_white        机器人：ID =@ + ID / fab_hazr/＆GT;＆LT; / LinearLayout中＆GT;＆LT; esfandune.ir.elmikarbordiardakan.other.CustomTxtView    机器人：layout_weight =5    机器人：layout_width =0dp    机器人：layout_height =FILL_PARENT    机器人：textAppearance =机器人：ATTR / textAppearanceLarge    机器人：文字=100    机器人：重力=右| center_vertical    机器人：ID =@ + ID / txt_ghybtNumber_itm/＆GT;＆LT; esfandune.ir.elmikarbordiardakan.other.CustomTxtView        机器人：layout_weight =30        机器人：layout_width =0dp        机器人：layout_height =FILL_PARENT        机器人：textAppearance =机器人：ATTR / textAppearanceLarge        机器人：文字=عباسعلیملاحسینیاردکانی        机器人：重力=右| center_vertical        机器人：ID =@ + ID / txt_title_itm    机器人：layout_marginRight =10dp    /＆GT;＆LT;查看    机器人：layout_width =0dp    机器人：layout_height =FILL_PARENT    机器人：layout_weight =10    类=de.hdodenhof.circleimageview.CircleImageView    机器人：ID =@ + ID /视图    机器人：SRC =@绘制/ mmrdf   /＆GT;＆LT; / LinearLayout中＆GT; 

解决方案

在您的适配器你在哪里膨胀的 onCreateViewHolder 的项目，是膨胀通话空？

如果因此将其更改为父这是在 onCreateViewHolder 函数签名的第一个参数。

 查看rootView = LayoutInflator.from（上下文）.inflate（R.layout.itemLayout，父母，假）; 

如果你需要的第二个参数是空然后当你在充气获取视图参考，请执行以下操作

 查看rootView = LayoutInflator.from（上下文）.inflate（R.layout.itemLayout，空，假）;RecyclerView.LayoutParams LP =新RecyclerView.LayoutParams（ViewGroup.LayoutParams.MATCH_PARENT，ViewGroup.LayoutParams.WRAP_CONTENT）;rootView.setLayoutParams（LP）;RecyclerViewHolder持有人=新RecyclerViewHolder（rootView）;回到持有人; 

My RecyclerView and item has match_parent width but the result is :

    <view
    class="android.support.v7.widget.RecyclerView"
    android:layout_width="match_parent"

and items:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:id="@+id/ll_itm"
android:orientation="horizontal"
android:layout_width="match_parent"

full:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:id="@+id/ll_itm"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="100"
android:gravity="right"
>


<Button
    android:layout_width="0dp"
    android:layout_weight="15"
    android:layout_height="fill_parent"
    android:text="ملاحظات"
    android:id="@+id/button" />

<LinearLayout
    android:layout_width="0dp"
    android:layout_height="fill_parent"
    android:layout_weight="20"
    android:gravity="center"
    >
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >

        <com.getbase.floatingactionbutton.FloatingActionButton
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            fab:fab_plusIconColor="#ff56ff83"
            fab:fab_colorNormal="@color/d_red"
            fab:fab_colorPressed="#ff5c86ff"
            fab:fab_size="mini"
            fab:fab_icon="@drawable/ic_remove_white"
            android:id="@+id/fab_rmv" />
        <esfandune.ir.elmikarbordiardakan.other.CustomTxtView
            android:layout_weight="25"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="0"
            android:gravity="right|center_vertical"
            android:id="@+id/txt_takhir_itm" />
        <com.getbase.floatingactionbutton.FloatingActionButton
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            fab:fab_plusIconColor="@color/colorprimarylight"
            fab:fab_colorNormal="@color/colorprimarydark"
            fab:fab_colorPressed="@color/colorprimary"
            fab:fab_size="mini"
            fab:fab_icon="@drawable/ic_add_white"
            android:id="@+id/fab_add" />

    </LinearLayout>
</LinearLayout>
    <Spinner
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="10"
        android:id="@+id/sp_nomre_itm"

        android:entries="@array/degrees"/>


<LinearLayout
    android:layout_width="0dp"
    android:layout_height="fill_parent"
    android:layout_weight="10"
    android:gravity="center"
    >
    <!--LinearLayout baraye ine ke nameshod fab ro weight behosh dad-->
    <com.getbase.floatingactionbutton.FloatingActionButton
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        fab:fab_plusIconColor="#ff56ff83"
        fab:fab_colorNormal="@color/d_green"
        fab:fab_colorPressed="@color/d_orange"
        fab:fab_size="normal"
        fab:fab_icon="@drawable/ic_done_white"
        android:id="@+id/fab_hazr" />



</LinearLayout>
<esfandune.ir.elmikarbordiardakan.other.CustomTxtView
    android:layout_weight="5"
    android:layout_width="0dp"
    android:layout_height="fill_parent"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="100"
    android:gravity="right|center_vertical"
    android:id="@+id/txt_ghybtNumber_itm" />

<esfandune.ir.elmikarbordiardakan.other.CustomTxtView
        android:layout_weight="30"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="عباسعلی ملاحسینی اردکانی"
        android:gravity="right|center_vertical"
        android:id="@+id/txt_title_itm"
    android:layout_marginRight="10dp"
    />

<view
    android:layout_width="0dp"
    android:layout_height="fill_parent"
    android:layout_weight="10"
    class="de.hdodenhof.circleimageview.CircleImageView"
    android:id="@+id/view"
    android:src="@drawable/mmrdf"
   />
</LinearLayout>

In your adapter where you are inflating the item in onCreateViewHolder, is the second parameter of the inflate call null?.

If so change it to parent which is the first parameter in the onCreateViewHolder function signature.

View rootView = LayoutInflator.from(context).inflate(R.layout.itemLayout, parent, false);

If you need the second parameter to be null then when you get the view reference on inflating, do the following

View rootView = LayoutInflator.from(context).inflate(R.layout.itemLayout, null, false);
RecyclerView.LayoutParams lp = new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
rootView.setLayoutParams(lp);
RecyclerViewHolder holder = new RecyclerViewHolder(rootView);
return holder;