AppBarLayout and CollapsingToolbarLayout not able to contain Button?

Question

I am working with this following Repository here:

CheeseSquare Repo via Chris Banes

Overall it is good repository but lacks complex layout schemes. I want to achieve something like this:

Where the "DO SOMETHING" button is contained inside AppBarLayout and nested inside CollapsingToolbarLayout, and it collapses as you scroll up. That is my original thought, but it doesn't seem to give me the behavior I am looking for.

This is what my XML Layout looks like:

<android.support.design.widget.CoordinatorLayout>

<android.support.design.widget.AppBarLayout>

    <android.support.design.widget.CollapsingToolbarLayout>

        <ImageView />

        <android.support.v7.widget.Toolbar />

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

    <Button/>

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

<android.support.v4.widget.NestedScrollView>

    <LinearLayout>

        <android.support.v7.widget.CardView>
            <LinearLayout>
                <TextView/>
            </LinearLayout>
        </android.support.v7.widget.CardView>

    </LinearLayout>

</android.support.v4.widget.NestedScrollView>

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

How would I go about accomplishing something like that?

Answer 1

I was able to solve this issue by implementing the following:

<android.support.design.widget.CoordinatorLayout>

    <android.support.design.widget.AppBarLayout>

    <android.support.design.widget.CollapsingToolbarLayout
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                app:layout_collapseMode="parallax"/>

            <android.support.v7.widget.Toolbar />

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

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

    <LinearLayout
        app:layout_behavior="@string/appbar_scrolling_view_behavior" >

        <!-- BUTTON INSERTED HERE -->
        <Button />
        <android.support.design.widget.TabLayout />
        <android.support.v4.view.ViewPager />

    </LinearLayout>

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