Ich habe Schwierigkeiten, die Symbolleiste wie in den folgenden Abbildungen zu implementieren:

Ich konnte jedoch nicht die schwebende Aktionsschaltfläche hinzufügen, wie auf dem Bild gezeigt. Ich verwende die Googles-Design-Support-Bibliothek. Irgendwelche Ideen

Mein aktueller XML-Code:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.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/imgBackdrop"
                    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"
                style="@style/Widget.PinList.ActionBar.Transparent"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin" />

        </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/tabs"
                style="@style/PinListTabLayout"
                android:layout_width="match_parent"
                android:layout_height="60dp"
                app:layout_collapseMode="pin" />

        </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="@color/background"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>