Android CoordinatorLayout+CollapsingToolbarLayout

Question

如题，xml代码如下：
<?xml version="1.0" encoding="utf-8"?>
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true" >

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="256dp"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" >

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapse_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|enterAlways|exitUntilCollapsed"
        android:fitsSystemWindows="true"
        app:contentScrim="@color/bar_bg_color" >

        <ImageView
            android:id="@+id/header"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.8"
            android:background="@drawable/goods4_4"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            app:layout_collapseMode="pin"
            android:gravity="top"
            android:minHeight="45dp"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:titleMarginTop="15dp" />
    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:orientation="vertical" >

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        app:tabGravity="fill"
        app:tabMode="fixed" 
        />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

<!--
<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" >

    <android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/black" />
</android.support.v4.widget.NestedScrollView>
-->

现在遇到个问题，AppBarlayout下面的布局如果换成NestedScrollView,滑动正常，但是如上面代码，换成LinearLayout，就不能正常滑动，app:layout_behavior="@string/appbar_scrolling_view_behavior"不生效一样，网上看到的deme是没问题的

Answer 1

app:layout_behavior="@string/appbar_scrolling_view_behavior" 貌似只适合带有滑动的控件，除布局，无滑动好像是不起作用的