How to add pull to refresh in Coordinator layout - android

I have an AppBar and RecyclerView in CoordiantorLayout. SwipeToRefresh has to be fullscreen but RecyclerView not scrolling down then.
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="128dp"/>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
How to add fullscreen pull to refresh in Coordinator layout without a library.


You can disable swipe refresh layout when AppBar isn't fully expanded and enable it if it is fully expanded.
vAppBar.addOnOffsetChangedListener(AppBarLayout.OnOffsetChangedListener { _, verticalOffset ->
vSwipeRefresh.isEnabled = verticalOffset == 0
})


I add swipetorefresh top level like answer above. And I fix my scroll up issue with code below. Thanks to mohammadReza :)
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener(){
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
int topRowVerticalPosition =
(recyclerView == null || recyclerView.getChildCount() == 0) ? 0 : recyclerView.getChildAt(0).getTop();
swipeRefreshLayout.setEnabled(topRowVerticalPosition >= 0);
}
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
}
});


try to set SwipeRefreshLayout as root parent like this :
<?xml version="1.0" encoding="utf-8"?>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout 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">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="128dp" />
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

Related

Recyclerview scrolling doesn't work in fragment that in nested scroll view

First off all : I worked before with recycler views and on scroll Listener and everything was great but this first time to use coordinator layout and use fragment in nested scroll view so i think the problem related to design
here's my summary on scroll code
categoryRecyclerView?.addOnScrollListener(object : RecyclerView.OnScrollListener() {
override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
super.onScrolled(recyclerView, dx, dy)
Log.e("scrolling","scroll")
if (dy > 0) {
Log.e("scrolling","vertical")
So when i scroll i didn't see ("scrolling","vertical") in my logcat but i only see ("scrolling","scroll") just one time no matter i scroll or not
here's my activity 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"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#color/layoutBackground">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/nestedScroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<FrameLayout
android:padding="8dp"
android:id="#+id/fragmentContainer"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_gravity="bottom"
android:background="#color/colorPrimary"
android:padding="8dp"
app:layout_behavior="#string/hide_bottom_view_on_scroll_behavior"
app:itemIconTint="#drawable/navigation_item_selector"
app:itemTextColor="#android:color/white"
app:menu="#menu/navigation_menu" />
</android.support.design.widget.CoordinatorLayout>
and here's my fragment xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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:background="#color/layoutBackground"
tools:context=".fragments.AllItemsFragment">
<android.support.v7.widget.RecyclerView
android:id="#+id/categoryRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:listitem="#layout/entertainment_recycler_view_item" />
<ProgressBar
android:id="#+id/loadingCategoryList"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
in onActivtyCreated in fragment i set
scrollView.isNestedScrollingEnabled = false
and in init recyclerview code i set recyclerview to
categoryRecyclerView?.isNestedScrollingEnabled = false
categoryRecyclerView?.setHasFixedSize(false);

Set
categoryRecyclerView?.isNestedScrollingEnabled = true
And instead of using recyclerview.addOnScrollListener(), use nestedScrollView.setOnScrollChangeListener().
nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
#Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX,
int oldScrollY) {
LinearLayoutManager layoutManager = (LinearLayoutManager) questionRecyclerView.getLayoutManager();
if (layoutManager != null) {
int visibleItemCount = layoutManager.getChildCount();
int totalItemCount = layoutManager.getItemCount();
int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
if (!questionAdapter.isLoading()) {
if (visibleItemCount +firstVisibleItemPosition >= totalItemCount
&& firstVisibleItemPosition >= 0
&& totalItemCount >= PAGE_SIZE) {
// loadMore();
}
}
}
}
}});

Hide and show custom view on scroll inside a SwipeRefreshLayout

I'm trying to implement hide/show SearchView on scroll feature inside a SwipeRefreshLayout.
I want to show SearchView when user scroll to the bottom and hide - when scroll to top.
Also i want to keep swipe refresh behaviour.
Tried many examples, but haven't seen close results.
My xml:
<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="#layout/loading_bar"/>
<include layout="#layout/network_error"/>
<include layout="#layout/empty_materials_coinlist"/>
<RelativeLayout
android:id="#+id/coinlist_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/coinlist_item_bg">
<RelativeLayout
android:id="#+id/custom_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="exitUntilCollapsed">
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="toolbar_title"
android:textColor="#color/toolbar_text_color"
android:textSize="18sp"
android:typeface="sans"
android:layout_gravity="center" />
</RelativeLayout>
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/custom_toolbar">
<android.widget.SearchView
android:id="#+id/sv_coin"
android:layout_width="match_parent"
android:layout_height="40dp"
android:iconifiedByDefault="false"
app:layout_scrollFlags="scroll|enterAlways|snap"/>
<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">
<android.support.v7.widget.RecyclerView
android:id="#+id/currenciesRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/coinlist_item_bg"
android:scrollbars="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.design.widget.CoordinatorLayout>
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>

Try this
myRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
}
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
if (dy > 0) {
//check for scroll down
int itemPosition = linearLayoutManager.findFirstCompletelyVisibleItemPosition();
if(itemPosition==list.size()){// your last item your recyclerview
// hide your SearchView here
}
} else {
//check for scroll up
int itemPosition = linearLayoutManager.findLastCompletelyVisibleItemPosition();
if(itemPosition==0){
// show your SearchView here
}
}
}
});

How to get an Item of Recyclerview when scroll stopped?

I have a Recyclerview inside Scrollview, I want to store item details of Recyclerview where scroll stopped.
I have a xml like,
<ScrollView
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:background="#color/White">
<RelativeLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/tile_view_pager"
android:layout_width="match_parent"
android:layout_height="200dp"
android:visibility="gone"
android:layout_marginRight="2dp"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/news_feed_recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</RelativeLayout>
I have added ScrollListener for recyclerview. But As I'm using parent Scrollview for the activity, recyclerview's ScrollListener is not getting called.
I tried changing parent scrollview to NestedScrollView then recyclerview is scrolling as a one item at once but i want scroll to be freely. Like scrolling our contacts.
Issue : When I scroll, Parent ScrollView getting scrolled and I don't have any control on my recyclerview. So It's difficult to figure out which item of recyclerview is visible once scroll stopped.
Basically I want to code without changing my XML.

I want to store item details of Recyclerview where scroll stopped.
When scroll stops, scroll state transitions into idle state. However, idle state is the state before and after scroll. Therefore you are looking for a transition into idle state after settling state.
Do it like this:
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
boolean scrolled;
int[] displayedPositions;
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (newState == RecyclerView.SCROLL_STATE_SETTLING) {
scrolled = true;
} else if (newState == RecyclerView.SCROLL_STATE_IDLE && scrolled) {
scrolled = false;
int[] into = new int[//number of spans];
displayedPositions = ((StaggeredGridLayoutManager) recyclerView.getLayoutManager()).findFirstCompletelyVisibleItemPositions(into)
}
}
}

private int overallXScrol = 0;
//...
mRecyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
overallXScroll = overallXScroll + dx;
Log.i("check","overall->" + overallXScroll);
}
});

try NestedScrollView instead scrollview like below
<android.support.v4.widget.NestedScrollView
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:background="#color/White">
<RelativeLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/tile_view_pager"
android:layout_width="match_parent"
android:layout_height="200dp"
android:visibility="gone"
android:layout_marginRight="2dp"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/news_feed_recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</RelativeLayout>

I found the solution. Just we need to change layout. I'm using CoordinatorLayout as a parent view. And Now I'm able to use onScrollListener of recyclerview.
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/White">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="#+id/tile_view_pager"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginEnd="2dp"
android:visibility="gone"/>
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/news_feed_recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>

RecyclerView's height not adjusted when the AppBarLayout is expanded

The code for initializing the RecyclerView
private void initRecyclerView() {
layoutManager = new GridLayoutManager(this, spanCount);
mRecyclerRV.setLayoutManager(layoutManager);
mRecyclerRV.addItemDecoration(new GridSpacingItemDecoration(spanCount, (int) (TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, spaceInDp, getResources().getDisplayMetrics()) + 1), false));
mRecyclerRV.setNestedScrollingEnabled(false);
mRecyclerRV.setAdapter(mAdapter);
mRecyclerRV.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (!recyclerView.canScrollVertically(-1)
&& RecyclerView.SCROLL_STATE_SETTLING == newState
&& mScrollVerticalDirection
&& mIsAppBarCollapsed) {
mAppBarLayout.setExpanded(true);
}
}
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
mScrollVerticalDirection = (dy < 0);
}
});
mRecyclerRV.postDelayed(new Runnable() {
#Override
public void run() {
RecyclerView.ViewHolder holder = mRecyclerRV.findViewHolderForAdapterPosition(1);
if (null != holder) {
holder.itemView.performClick();
}
}
}, 1000);
}
The layout file is here, and uses CoordinatorLayout
<?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/activity_local_album_coordinator"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:background="#color/colorPageBg">
<android.support.design.widget.AppBarLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/activity_local_album_appbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/border_bottom_bg"
android:theme="#style/Wemeet.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/activity_local_album_collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="#dimen/dp2"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<android.support.v7.widget.Toolbar
android:id="#+id/local_album_toolbar"
style="#style/WemeetTitlebar"
android:layout_marginStart="-10dp"
android:titleTextColor="#color/colorText33"
app:layout_scrollFlags="scroll"
android:theme="#style/Wemeet.Toolbar">
<TextView
android:id="#+id/comm_toolbar_title"
style="#style/WemeetTitlebar.Title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:text="相机胶卷"
android:gravity="center"
android:singleLine="true" />
</android.support.v7.widget.Toolbar>
<LinearLayout
android:layout_gravity="center_horizontal"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_marginTop="#dimen/dp48"
android:layout_height="350dp"
app:layout_scrollFlags="scroll">
<View
android:layout_width="match_parent"
android:layout_height="1px"
android:background="#color/colorDivider"
android:id="#+id/fg_top_border" />
<com.weiguan.wemeet.basecomm.ui.widget.WemeetVideoView
android:visibility="gone"
android:layout_gravity="center"
android:id="#+id/activity_local_album_preview_video"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</com.weiguan.wemeet.basecomm.ui.widget.WemeetVideoView>
<ImageView
android:id="#+id/activity_local_album_preview_iv"
android:layout_gravity="center_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitCenter" />
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/activity_local_album_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v7.widget.RecyclerView>
</android.support.design.widget.CoordinatorLayout>
When the AppBarLayout is collapsed the RecyclerView scroll happens correctly.
But when the AppBarLayout is expanded, the height of the RecyclerView does not adjust and the scrolling appears abnormal

No ways to get it. But resize the recycler view when the app bar is expand or gonna collapse.

Android Floating Action Button doesn't get fixed at the bottom

I have a fragment which renders a recycleview with an floating action button. The problem is that when the list is empty, the fab keeps on the right top, when the list has few items, the fab keeps below the list but not at the bottom, and it only keeps totally at the bottom when the list fill the screen with items. Could somebody help me please? Bellow is my code:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.app.juninho.financeapp.activity.FuncionarioActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/funcionario_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/btn_add_func"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right|end"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
android:src="#drawable/ic_menu_send"
app:layout_behavior="com.app.juninho.financeapp.utils.ScrollAwareFABBehavior" />
</android.support.design.widget.CoordinatorLayout>
if the list is empty, fab keeps at the top, which is wrong:
if the list has a few items, fab doesn't keep totally at the bottom:
Here is the correct way, fab is at the bottom:
Using RelativeLayout it seems to work, but its too at the right/bottom corner:

The problem is your FAB attribute: app:layout_behavior="com.app.juninho.financeapp.utils.ScrollAwareFABBehavior".
#. You don't need to add this with your FAB. Just remove this attribute and add attribute app:layout_anchor="#id/funcionario_recycler_view" and app:layout_anchorGravity="bottom|right|end" to FAB to anchor it with RecyclerView.
Update your layout as below:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.app.juninho.financeapp.activity.FuncionarioActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/funcionario_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/btn_add_func"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right|end"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
android:src="#drawable/ic_menu_send"
app:layout_anchor="#id/funcionario_recycler_view"
app:layout_anchorGravity="bottom|right|end" />
</android.support.design.widget.CoordinatorLayout>
#. If you want to hide/show FAB when scrolling RecyclerView, then you can do it pragmatically in your java code as below:
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.funcionario_recycler_view);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.btn_add_func);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener()
{
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy)
{
if (dy > 0 ||dy<0 && fab.isShown())
{
fab.hide();
}
}
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState)
{
if (newState == RecyclerView.SCROLL_STATE_IDLE)
{
fab.show();
}
super.onScrollStateChanged(recyclerView, newState);
}
});
Hope this will help~

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