DrawerLayout与RecyclerView冲突？ RecyclerView填充整个屏幕

Question

我用AndroidStudio.But附带的DrawerLayout创建了一个活动。当我使用RecyclerView时，RecyclerView填满了整个屏幕......？

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:fitsSystemWindows="true" 
tools:openDrawer="start"> 
    <include 
     layout="@layout/app_bar_main" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 
    <android.support.design.widget.NavigationView 
     android:id="@+id/nav_view" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:fitsSystemWindows="true" 
     app:headerLayout="@layout/nav_header_main" 
     app:menu="@menu/activity_main_drawer" /> 
    <android.support.v7.widget.RecyclerView 
     android:layout_marginTop="20dp" 
     android:id="@+id/titleList" 
     android:layout_width="match_parent" 
     android:layout_height="80dp"/> 
</android.support.v4.widget.DrawerLayout> 

The Button on the left top can't be used.Guess it was coverd by RecyclerView

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Answer 1

你的布局需要像这样进行结构化：

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