Android工具栏collapseMode问题

我有一个问题是“带有标题文本的工具栏”在CollapsingToolbarLayout中向上滚动时不折叠.

我尝试了一些调整,使用app：layout_collapseMode =“none”作为我的android.support.v7.widget.Toolbar中的属性,但它不起作用.也许我的布局有问题.

以下是我想要实现的目标.

但是当我滚动到顶部时,工具栏也会折叠,并且tabBar也会向内滚动,并变得不可见.以下就是我现在所拥有的.

这是我的布局代码

<android.support.design.widget.CoordinatorLayout xmlns:android="http://scheR_262_11845@as.android.com/apk/res/android"
    xmlns:app="http://scheR_262_11845@as.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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



        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:contentScrim="?attr/colorPriMary"
            app:layout_scrollFlags="scroll|enterAlways">

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="250dp"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.7">

                <ImageView
                    android:id="@+id/BACkdrop"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:scaleType="centerCrop" />

                <View
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:BACkground="#20000000" />

            </FrameLayout>

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="none"
                >
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Application title"
                    android:textColor="#fff"
                    android:textSize="18sp" />
            </android.support.v7.widget.Toolbar>




        </android.support.design.widget.CollapsingToolbarLayout>



        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll|enterAlways">

            <android.support.design.widget.TabLayout
                android:id="@+id/detail_tabs"
                android:layout_width="match_parent"
                android:layout_height="60dp"
                app:layout_collapseMode="pin"

                android:BACkground="#00000000"
                app:tabSELEctedTextColor="#3498db"
                app:tabTextColor="#000" />
            />

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:BACkground="#333"
        app:layouT_Behavior="@String/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

依赖

dependencies {
    compile fileTree(dir: 'libs',include: ['*.jar'])
    compile "com.android.support:appcompat-v7:22.2.1"
    compile "com.android.support:support-Annotations:22.2.1"
    compile "com.android.support:design:22.2.1"
    compile 'com.android.support:recyclerview-v7:22.2.1'
    compile 'com.android.support:cardview-v7:22.2.1'

}

<android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:contentScrim="?attr/colorPriMary" >

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="250dp"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.7" >

            <ImageView
                android:id="@+id/BACkdrop"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop" />

            <View
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:BACkground="#20000000" />
        </FrameLayout>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Application title"
                android:textColor="#fff"
                android:textSize="18sp" />
        </android.support.v7.widget.Toolbar>

    </android.support.design.widget.CollapsingToolbarLayout>