I have an outer CoordinatorLayout that has, as AppBar, the Toolbar and a TabLayout bar and, as content, a ViewPager with appbar_scrolling_view_behavior:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:id="#+id/main_content"
android:layout_width="match_parent" android:layout_height="match_parent"
tools:context=".MainActivity" >
<android.support.design.widget.AppBarLayout android:id="#+id/appbar"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar android:id="#+id/toolbar"
android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary" app:popupTheme="#style/AppTheme.PopupOverlay"
app:layout_scrollFlags="scroll|enterAlways|snap">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout android:id="#+id/tabs"
android:layout_width="match_parent" android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager android:id="#+id/container"
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"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
When a tab is selected, the ViewPager is updated with a FrameLayout containing another CoordinatorLayout.
This one should display a collapsable Google Map fragment on top of a RecyclerView (showing a vertical list of items).
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:id="#+id/nearby_content"
android:layout_width="match_parent" android:layout_height="match_parent"
tools:context=".MainActivity" >
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways">
<fragment
android:id="#+id/mapFragment"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="300dp"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_overlapTop="184dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
</FrameLayout>
The expected behavior is that when the user touches inside the map, the map itself should receive the gesture and therefore pan the view.
While if the user scrolls upwards starting the gesture from inside the visible part of the list, the list (RecyclerView) should slide over the collapsing Map, until the AppBar is reached. At that point further scrolling up should slide only the list.
The problem arises when the gesture is not too much slow: part of the scrolling (roughly the equivalent of the TabLayout height) is consumed by the RecyclerView before it reaches the AppBar.
Also, after scrolling all the way up the list, scrolling down first expands the map and then slides the list (leaving the first part of the list hidden), when it should do the viceversa.
Before scrolling up
After scrolling all the way up and down a bit
I'm not very sure about the answer but you can try adding android:nestedScrollingEnabled="false" inside your recycler view:
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_overlapTop="184dp"
android:nestedScrollingEnabled="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
Hope it helps.
Related
I have a detail activity that show the details of a game in my app. The layout is composed mainly by a CollapsingToolbarLayout with the game cover and a NestedScrollView containing the details. The layout is like this:
And scrolled like this:
The XML files for the layout are:
<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:id="#+id/game_detail_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".activities.GameDetailActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<ImageView
android:id="#+id/toolbar_cover"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="#string/game_cover"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax" />
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/scrim" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</net.opacapp.multilinecollapsingtoolbar.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_game_detail" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end"
app:srcCompat="#drawable/ic_favorite_border_black_24dp" />
</android.support.design.widget.CoordinatorLayout>
And the content_game_detail is:
<android.support.v4.widget.NestedScrollView 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:id="#+id/game_detail_scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".activities.GameDetailActivity"
tools:showIn="#layout/activity_game_detail">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- There are 11 TextViews here for all the info -->
<android.support.v7.widget.RecyclerView
android:id="#+id/videos_recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/simple_margin"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/videos_lable" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
The problem is: when the summary is very long and there are videos to add items to the RecyclerView, the layout start a little scrolled below the expanded toolbar like this:
I need to scroll the view back down to see the top of the information. Testing, I narrowed down the problem to the RecyclerView. When I remove it, this problem doesn't happen. It seems that when the items are added to the RecyclerView, the layout scroll itself up to compensate, but I couldn't found why this happens (instead of just expand the view down) nor how to solve it. Does anyone have any idea?
I am trying to implement pull to refresh but I'm having an issue with SwipeRefreshLayout not wrapping the child view's height. In the view preview and in a live build it appears to have 0 height.
The layout as as follows:
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:elevation="0dp">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
app:layout_collapseMode="pin">
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include layout="#layout/child_layout" />
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
I have also tried making the SwipeRefreshLayout the parent of the AppBarLayout without any success as well as putting a singular LinearLayout inside of the SwipeRefreshLayout. The only thing that seems to prevent the height of the swipe layout from being 0 is to set it statically but I want it to be dynamic based upon the height of the child view.
Is there something I'm missing here? It seems like there may be a bug with SwipeRefreshLayout because replacing it with a LinearLayout that also wraps the content works as expected.
The problem is your SwipeRefreshLayout is inside the Toolbar and AppBarLayout. You must wrap AppBarLayout with another layout and put SwipeRefreshLayout below the AppBarLayout. An example is at the below.
<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"
xmlns:tools="http://schemas.android.com/tools"
android:fitsSystemWindows="true"
tools:context="com.vsahin.moneycim.View.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="250dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
android:fitsSystemWindows="true"
app:expanded="false">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
android:background="#drawable/gradient_background">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.SwipeRefreshLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.design.widget.CoordinatorLayout>
if your SwipeRefreshLayout height is wrapping the content of your child_layout, then your child_layoutheight should be set to match_parent OR both SwipeRefreshLayout and child_layout height should be set to match_parent as shown in the Android Documentation
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/swiperefresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Child View-->
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
SwipeRefreshLayout is a transparent View, so best solution to set it match_parent it will not conflict with other Views and don't include View or Layout within it, keep it clean
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:elevation="0dp">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
app:layout_collapseMode="pin">
<include layout="#layout/child_layout" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
SwipeRefreshLayout has to be in top to overlay other layers and be clickable
I have a simple layout that is a CoordinatorLayout containing a Toolbar in an AppBarLayout and a RecyclerView. To allow for a progress bar while content is loaded into the RecyclerView I've wrapped it in a FrameLayout alongside a ProgressBar which I've included from another file. When the content is loading the ProgressBar is set to VISIBLE and when it's finished it's set to GONE, showing the RecyclerView. I'd like to use a ScrollingViewBehavior so that when I scroll my RecyclerView the Toolbar is hidden. I've tried adding it to the FrameLayout and the RecyclerView and neither seems to work.
What do I have to do to get the behavior I am looking for? Do I need to make a new ViewGroup or something like that in order to show/hide the ProgressBar and define a new Behavior for that, or is there something simpler?
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ToolbarTheme"
android:background="?attr/colorPrimary"/>
</android.support.design.widget.AppBarLayout>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
android:id="#+id/recycler_view" />
<include layout="#layout/progress_circle" />
</FrameLayout>
<include layout="#layout/floating_action_button"/>
</android.support.design.widget.CoordinatorLayout>
I have almost the same setup you do, but I've included two progress bars. One appears when the activity is loaded, and covers the whole thing. The second one appears on a swipe refresh and only replaces the RecyclerView (well, actually the RecyclerView's parent SwipeRefreshLayout).
<RelativeLayout
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:focusableInTouchMode="true">
<include layout="#layout/loading_progress"/>
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinator_layout"
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:fitsSystemWindows="false">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:fitsSystemWindows="false"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="false"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_landing_page"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/loading_progress"/>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="#dimen/landing_page_top_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.design.widget.CoordinatorLayout>
</RelativeLayout>
And my progress bar is just:
<ProgressBar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/loading_progress"
style="#android:style/Widget.ProgressBar.Inverse"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
When it's time to show the progress bar I set it to View.VISIBLE and the SwipeRefreshLayout (or the CoordinatorLayout for when the Activity is loaded) to View.GONE. Then reverse the VISIBLE and GONE when the data is loaded.
I have a ViewPager within a CoordinatorLayout:
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="fill_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
It's a little faint in the picture, but the blue box is after the toolbar.
It puts the ViewPager after the ToolBar and TabBar, but the height extends too much. I want the height to fill the parent.
If I remove the layout behavior it works, but I don't know how much the marginTop should be (there's the ActionBar's height + TabBar's height).
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_marginTop="150dp"
/>
I want to have the ViewPager be after the toolbar and extend to the end of the device.
This is the entire XML:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainView">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="fill_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"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
The behavior is because of your current configuration of the app:layout_scrollFlags. If you don't android to push the ViewPager down set it to an empty String app:layout_scrollFlags="". You can change its behavior afterwards if you need/have/want to.
you should wrap the AppBarLayout and the ViewPager in the CoordinatorLayour and add app:layout_behavior="#string/appbar_scrolling_view_behavior" to the ViewPager. That line does the trick. Avoid that the content of your ViewPager goes behind the Toolbar/TabLayout
I have CollapsingToolbarLayout which depends on scrolling of RecyclerView in Fragment in ViewPager. The problem is that ViewPager is too high and out of bounds of CoordinatorLayout, independently whether it has "match_parent" or "wrap_content" layout_height. Thus ViewPager scrolls even if RecyclerView has only few items.
And other problem is that I can not make static elements in fragments in ViewPager. I want make FAB floating over the RecyclerView, but the FAB is located under the bottom bound of the screen until I will scroll it up.
Here some code
Main Layout:
<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:fitsSystemWindows="true"
android:background="#android:color/white">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/viewPager"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="122dp"
android:fitsSystemWindows="true"
android:id="#+id/collapsingToolbar"
app:expandedTitleMarginStart="56dp"
app:layout_scrollFlags="scroll|enterAlways">
<android.support.v7.widget.Toolbar
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
android:id="#+id/toolbar"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_gravity="bottom"
android:id="#+id/tabLayout"
android:background="#color/default_green"
app:tabIndicatorColor="#color/white"/>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
Fragment:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="#+id/recyclerView"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/bookMark"
android:fitsSystemWindows="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_shape3x"
android:layout_gravity="end|bottom"
app:fabSize="normal"
app:backgroundTint="#color/default_green"
android:layout_margin="16dp"
app:elevation="4sp"
app:borderWidth="0dp"
android:contentDescription=""/>
</android.support.design.widget.CoordinatorLayout>
I managed to solve this proplem in such way. First of all I blocked AppBarLayout from scrolling like explained here.
And then I placed FAB directly to the CoordinatorLayout and lincked it's hidding to the ViewPager scrolls like here.
Also I wanted an EditText floating over the one of the fragments, which are inside ViewPager. I placed it inside CoordinatorLayout and made it sliding up and down, when ViewPager scrolls.