Unable to hide the Toolbar + Recycler View

Question

i Created a Tool bar without using Collapsing Toolbar. I need to hide the toolbar on scrolling up the Recycler view.i followed link for scrolling/hiding toolbar

http://android-developers.blogspot.com/2015/05/android-design-support-library.html

Here is my xml

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

<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:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_scrollFlags="scroll|exitUntilCollapsed" />
</android.support.design.widget.AppBarLayout>

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" /></android.support.design.widget.CoordinatorLayout>

Here is my output I am Not sure where its going wrong. I did every thing correctly . But on scrolling the recycler view the Toolbar stays at the same position. Its not hiding.

Your help is much appreciated.

Answer 1

There are known issues with using using wrap_content for your Toolbar. Instead, use a fixed height:

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    app:layout_scrollFlags="scroll|enterAlways" />

You'll note I use scroll|enterAlways - exitUntilCollapsed only makes sense when you are using a CollapsingToolbarLayout (or any layout that has a different layout_height and minHeight).

Answer 2

Also make sure build.gradle has at least buildToolsVersion "22.0.1" and

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