隐藏滚动设计支持库上的工具栏

Question

How to hide toolbar on scroll in recyclerview, which is located in fragment in viewpager, if using new design support library?

<android.support.v4.widget.DrawerLayout 
    ... >
    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v4.view.ViewPager
            android:id="@+id/viewPager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                ...
                android:minHeight="?actionBarSize"
                app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:layout_scrollFlags="scroll|enterAlways" />

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

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

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

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        ... />
</android.support.v4.widget.DrawerLayout>

Answer 1

Your layout appears to be fine. You should however also add the behaviour inside your RecyclerView (I suppose it is in a Fragment that is later added to the ViewPager):

app:layout_behavior="@string/appbar_scrolling_view_behavior"

and most importantly and as stated by this other SO answer , don't forget to update your build tools to 22 and your gradle references to at least v 22.20 of both the component and the Design Support Library:

compile 'com.android.support:design:22.2.0'
compile 'com.android.support:recyclerview-v7:22.2.0'

Check out this for a complete tutorial.

Answer 2

There is a control already built into the library called CollapsingToolbarLayout . It is already designed to collapse on scroll, and will include Paralax, text, and fading effects (so you should use it).