CoordinaterLayout下方的两个RecyclerView

Question

我正在CoordinaterLayout下面的RelativeLayout中插入两个RecyclerView。

这是我的密码。

<?xml version="1.0" encoding="utf-8"?>
    <android.support.design.widget.CoordinatorLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true">
    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="350dp"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginBottom="30dp"
        app:expandedTitleMarginEnd="50dp"
        app:expandedTitleMarginStart="30dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:contentDescription="@null"
        android:fitsSystemWindows="true"
        android:scaleType="centerCrop"
        app:layout_collapseMode="parallax"/>    
    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        app:layout_collapseMode="pin"/>
    </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout> 
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">
    <include
        android:id="@+id/details"
        layout="@layout/adapter_details"/>      
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/details"/>   
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/recycler_view"/> 
    </RelativeLayout>               
    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        app:layout_anchor="@+id/appbar"
        app:layout_anchorGravity="bottom|right|end"/>   
    </android.support.design.widget.CoordinatorLayout>

当我执行应用程序时，第二个RecyclerView，recycler_view2，不会出现。为什么？我该怎么解决？

Answer 1

You can try 
   <android.support.v4.widget.NestedScrollView
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="vertical">
   <ScrollView
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <LinearLayout
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/details"/>   
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/recycler_view"/> 
  </LinearLayout>
         </ScrollView>
     </android.support.v4.widget.NestedScrollView>