分类布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="match_parent"
    tools:context="zhangyanran20181022.bwie.com.zhoukaosan.mvp.view.MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/zrv"
        android:layout_width="100dp"
        android:layout_height="match_parent" />

    <ExpandableListView
        android:id="@+id/yev"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

child_item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/img_child"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_gravity="center"/>
    
    <TextView
        android:id="@+id/tv_child"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="名字"/>
</LinearLayout>

youhai_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/youhao_re"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</LinearLayout>

you_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/you_you"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="名字"
        android:layout_gravity="center"/>
</LinearLayout>

zuo_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/zuo_mz"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="名字"
        android:layout_gravity="center"/>
</LinearLayout>