Let's assume that we have the following layout:
<?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:id="@+id/main_content"
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.SearchView
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:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
In this layout, if I drag the SearchView upward, it will collapse and disappear. But I wonder how I can attach this dragging effect to my RecyclerView. Means I like to collapse the SearchView whenever I scroll RecyclerView items upward, but expand SearchView when I scroll RecylcerView items downward. Do I need to create a custom behavior for SearchView or it is possible to create this effect by available behaviors?
Best Regards
Use a collapsing toolbar layout and wrap up the searchView inside it... and also wrap up the recyclerView with a nestedScrollView and add the app:layout_behavior="@string/appbar_scrolling_view_behavior"/> to the nested scroll view instead
Dont forget to add scrollFlags and content_scrim to your collapsing toolbar layout..
The collapsing toolbar layout should be inside the appBarLayout
For reference check this out