DrawerLayout抽屉布局item点击事件失效原因之一

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最近使用抽屉布局

DrawerLayout出现一个问题如下 代码描述 点击事件失效

<?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">
    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:menu="@menu/activity_main_drawer" />

    <include
        android:id="@+id/include1"
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <include
        android:id="@+id/include2"
        layout="@layout/chfd_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="invisible"
        />
</android.support.v4.widget.DrawerLayout>

后来通过了解

DrawerLayout了解到 

DrawerLayout布局子布局摆放有明确规定先后顺序

修改后为 

<?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
        android:id="@+id/include1"
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:menu="@menu/activity_main_drawer" />
    <include
        android:id="@+id/include2"
        layout="@layout/chfd_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="invisible"
        />
</android.support.v4.widget.DrawerLayout>

点击事件就有反应了