如果 RecyclerView 在 LinearLayout 中,AppBarLayout 在更新到设计库 22.2.1 后不会滚动

AppBarLayout doesn't scroll after update to design library 22.2.1, if RecyclerView is inside LinearLayout

将设计库更新到 v22.2.1 后,我的 activity 布局将不再滚动。它在更新之前工作正常。布局如下所示:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    style="@style/layout.content"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:fitsSystemWindows="true"
            app:layout_scrollFlags="scroll|enterAlways"/>
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        style="@style/layout.content.root"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <include layout="@layout/progress_bar"/>

        <LinearLayout
            android:id="@+id/content"
            style="@style/layout.content.root">

            <include layout="@layout/layout_search_cities"/>

            <android.support.v7.widget.RecyclerView
                android:id="@+id/recycler_view"
                style="@style/layout.match"
                android:scrollbars="vertical"/>
        </LinearLayout>
    </FrameLayout>
</android.support.design.widget.CoordinatorLayout>

我唯一能弄清楚的是,如果我将 recyclerView 的父级从 LinearLayout 更改为 FrameLayout,一切正常:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    style="@style/layout.content"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:fitsSystemWindows="true"
            app:layout_scrollFlags="scroll|enterAlways"/>
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        style="@style/layout.content.root"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <include layout="@layout/progress_bar"/>

        <FrameLayout
            android:id="@+id/content"
            style="@style/layout.content.root">

            <include layout="@layout/layout_search_cities"/>

            <android.support.v7.widget.RecyclerView
                android:id="@+id/recycler_view"
                style="@style/layout.match"
                android:layout_marginTop="?attr/actionBarSize"
                android:scrollbars="vertical"/>
        </FrameLayout>
    </FrameLayout>
</android.support.design.widget.CoordinatorLayout>

我错过了什么?

原来这是v22.2.1的问题;我通过推进到设计库 v23.0.0 来修复它。