Develop Reference

Unable to scroll RecyclerView with Child items

I have a RecyclerView where in each item i can add X child items, when a parent item is added my RecyclerView scrolls to bottom but the issue is that when lot of child items are added to the last element it's not scrolling to last child (obviously as i'm doing scrollToPosition of last RecyclerView item).
So how should i perform the scrolling in the way that it scrolls to even last child not only the parent item?
Here a gif of how it looks like.
XML
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:stackFromEnd="true"
android:paddingBottom="45dp"
tools:listitem="#layout/comanda_list" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fabInvia"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:backgroundTint="#00C853"
app:layout_anchor="#+id/bottomSheet"
app:borderWidth="0dp"
app:layout_anchorGravity="top|center"
app:srcCompat="#drawable/ic_baseline_send"
android:contentDescription="#string/verifica_gp" />
<include layout="#layout/bottom_sheet_pterm" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Code where i add a child item in my Adapter
public void addChild(int position, Varianti variante) {
comandeList.get(position).setVariant(variante);
notifyItemChanged(position);
}
onBindViewHolder where the child items are rendered
#Override
public void onBindViewHolder(#NonNull final ExampleViewHolder holder, final int position) {
final Comanda item = comandeList.get(position);
...
List<Varianti> variants = item.getVarianti();
if (variants != null && variants.size() > 0) {
for (Varianti v : variants) {
View vView = mInflater.inflate(R.layout.varianti_layout, holder.variantsContainer, false);
TextView nameTV = vView.findViewById(R.id.variant_name);
if (v.getState().equals("K") || v.getState().equals("KK")) {
nameTV.setTypeface(null, Typeface.BOLD);
}
if (!item.getState().equals("S")) {
nameTV.setTextColor(Color.parseColor("#FFFFFF"));
}
nameTV.setText(v.getDescrizione());
nameTV.setBackground(v.getDrawable());
holder.variantsContainer.addView(vView);
}
}
...
}
In activity after adding new item / child item
adapterComanda.addVariante(position, variante);
recyclerComanda.scrollToPosition(adapterComanda.getItemCount() - 1);
BottomSheet
<LinearLayout 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/bottomSheet"
android:background="#FFFFFF"
android:layout_width="match_parent"
android:layout_height="450dp"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
app:behavior_hideable="false"
android:elevation="5dp"
app:behavior_peekHeight="60dp"
android:orientation="vertical">
... (different LinearLayouts)
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:gravity="bottom"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerViewTasti"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="50dp"
android:paddingTop="3dp"
android:paddingBottom="3dp"
tools:listitem="#layout/tasto_list"
app:spanCount="4"
android:scrollbars="vertical"
app:layoutManager="androidx.recyclerview.widget.GridLayoutManager" />
</LinearLayout>
</LinearLayout>

The issue with your code is it is Scrolling to the bottom, but the recycler view is going below the <include layout="#layout/bottom_sheet_pterm" />
Try setting a layout_anchor
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:paddingBottom="45dp"
app:layout_anchor="#+id/fabInvia"
app:stackFromEnd="true" />
Or use a constraintlayout which constraints bottom to top of fabInvia.

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>

Dealing With RecyclerView, NestedScrollView, and CardView

I'm going to achieve this UI in my App:
Well, Some ways that I tried before:
1. Using CollapsingToolbarLayout
I put my CardView insid of CollapsingToolbarLayout and put them all in AppBarLAyout.
<android.support.design.widget.CoordinatorLayout
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:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed" >
<CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<!-- My Views Goes there -->
</CardView
<android.support.v7.widget.Toolbar
android:id="#+id/flexible.example.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#null"
app:layout_collapseMode="pin"
style="#style/ToolBarWithNavigationBack"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<RecyclerView
app:layout_behavior="#string/appbar_scrolling_view_behavior"
></RecyclerView>
</android.support.design.widget.CoordinatorLayout>
P.S: I removed unrelated codes, don't mention me
This Way works correctly but!!! When CardView height goes taller than screen height, it's content igonered by AppBarLayout and does not show to user
2. Using NestedScrollView
I put CardView and RecyclerView inside NestedScrollView. But the problem is When User Reached To end of RecyclerView and then scroll back to top, fling goes laggy and buggy and stop some where ans user have to scroll more and more to get to top!
<android.support.v4.widget.NestedScrollView
android:id="#+id/nested_scrollbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="fill_vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:scrollbars="none" >
<LinearLayout
android:id="#+id/nested_scrollbar_linear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<android.support.v7.widget.CardView
android:id="#+id/flexible.example.cardview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardBackgroundColor="#color/post_card_backgroind"
app:cardCornerRadius="0dp"
app:cardElevation="0dp">
</android.support.v7.widget.CardView>
<android.support.v7.widget.RecyclerView
android:id="#+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/four"
android:layout_marginEnd="#dimen/four"
android:layout_marginLeft="#dimen/four"
android:layout_marginRight="#dimen/four"
android:layout_marginStart="#dimen/four"
android:layout_marginTop="#dimen/four"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
How can fix this issue?!
I don't want use adapters that make header for recyclerview, I got performance related issue from some of them.
Answer
Put RecyclerView inside NestedScrollView as you can see in 2 and apply .setNestedScrollingEnabled and set it to false

You should use getItemViewType. It is easy and won't create any performance overhead. Change the code in your Adapter like this:
public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
class CardViewHolder extends RecyclerView.ViewHolder {
...
}
class ItemViewHolder extends RecyclerView.ViewHolder {
...
}
#Override
public int getItemViewType(int position) {
if (position == 0) {
return 0; // Card Type
} else {
return 1; // Item Type
};
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case 0:
// Card Type
return new CardViewHolder(...);
case 1:
// Item Type
return new ItemViewHolder(...);
}
}
// Optional
// If your data list does not contain CardView data
// You may need to add extra count in adapter
#Override
public final int getItemCount() {
// Add one count for CardView data
return list.size() + 1;
}
#Override
public T getItem(int position) {
// As the position is change because of CardView at position 0
// So you may have to decrement the corresponding index
return list.get(position - 1);
}
}
UPDATE 1
If you don't want to update the adapter, you can use
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CardView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!-- Views Goes there -->
</CardView>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
// This is the key
android:nestedScrollingEnabled="false"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
android:nestedScrollingEnabled is available in API Level 21 through xml.
For lower APIs use java method i.e. recyclerView.setNestedScrollingEnabled(false); or ViewCompat.setNestedScrollingEnabled(recyclerView, false);
NOTE (12-12-2016)
When using nested scroll. Be aware of the known issue of RecyclerView not recycling views as asked here and here (apparent reason answered by Arpit Ratan and me respectively). So I'll suggest to go with the first solution i.e. using getItemViewType. For more details, see complete and better answers like this or this.
UPDATE 2
You can use setFullSpan. If the orientation of your StaggeredGridLayoutManager is vertical, you can use the following code to span it's width to full screen:
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (position == 0) {
StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) viewHolder.itemView.getLayoutParams();
layoutParams.setFullSpan(true);
}
}

the problem in 2.using
But the problem is When User Reached To end of RecyclerView and then scroll back to top
it can be deal by add android:descendantFocusability="blocksDescendants in the first layout under the NestedScrollView like this:
<android.support.v4.widget.NestedScrollView
android:id="#+id/nested_scrollbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="fill_vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:scrollbars="none" >
<LinearLayout
android:id="#+id/nested_scrollbar_linear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants" >
it work for me. NestedScrollView scrolls to top on Recyclerview resized

Recyclerview inside scrollview- How to scroll whole content?

I am having Recyclerview inside Scrollview
<Scrollview
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:id="#+id/layoutStaticContent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
//Static content.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp">
.
.
<LinearLayout>
//Dynamic content(newsfeed)
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</ScrollView>
Now while scrolling, layoutStaticContent stays fix on the top & recyclerview content scrolls independently in the bottom part.
How to scroll the whole content i.e (layoutStaticContent + recyclerview content) such that there is only 1 scrollview?
I also tried replacing scrollview with Nestedscrollview but no success.

Use the android.support.v4.widget.NestedScrollView then inside both layout
NestedScrollView

Put the LinearLayout which contains both the static and dynamic data inside of a NestedScrollView and it'll work like a charm.
Here is the code you need:
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/layoutStaticContent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
//Static content.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp">
.
.
<LinearLayout>
//Dynamic content(newsfeed)
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
I hope it helps!

One possible way around this is only use RecyclerView with the static content as header to your Recyclerview.
Then the layout would simply be:
//Dynamic content(newsfeed)
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
There will be a list_item_header.xml layout for your static content:
//Static content.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp">
.
.
<LinearLayout>
And you'll have to change your recyclerview adapter to contain:
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
#Override
public int getItemCount()
{
int itemCount = super.getItemCount();
if (mIsHeaderPresent)
{
itemCount += 1;
}
return itemCount;
}
#Override
public int getItemViewType(int position)
{
if (mIsHeaderPresent && position == 0)
{
return TYPE_HEADER;
}
return TYPE_ITEM;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
if (viewType == TYPE_HEADER)
{
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_header, parent, false);
ViewHolderHeader viewHolder = new ViewHolderHeader(itemView);
return viewHolder;
} else if (viewType == TYPE_ITEM)
{
return getItemViewHolder(parent);
}
throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder passedViewHolder)
{
if (mIsHeaderPresent && passedViewHolder instanceof ViewHolderHeader)
{
onBindHeaderViewHolder((ViewHolderHeader) passedViewHolder);
} else
{
onBindItemViewHolder(passedViewHolder);
}
}

if you want to scroll all data i think you have to use CoordinatorLayout. in CoordinatorLayout you use appbar layout and CollapsingToolbarLayout where you can put your static content. because its a wrong approach in android to use a scroll able container in to another scroll able container. you can use coordinater layout like this.
<?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"
android:fitsSystemWindows="true"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="?attr/colorPrimary"
android:fitsSystemWindows="true"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
//Static content.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp">
.
.
<LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>

After a lot of searching and trying, I found the solution:
1. Set the height for the RecyclerView inside the ScrollView:
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
...
<android.support.v7.widget.RecyclerView
android:id="#+id/myPostsRecyclerView"
android:layout_width="match_parent"
**android:layout_height="550dp"**
android:layout_below="#+id/textView7"
android:background="#drawable/background"
android:padding="5dp"
**android:visibility="gone"**
tools:listitem="#layout/item_send" />
</RelativeLayout>
</ScrollView>
2. In the adapter , where you set the data list :
public void setData(List<Post> posts) {
this.posts.clear();
this.posts.addAll(posts);
notifyDataSetChanged();
if (posts.size() < 1)
activity.recyclerView.setVisibility(View.GONE);
else {
activity.recyclerView.setVisibility(View.VISIBLE);
ViewGroup.LayoutParams params=activity.recyclerView.getLayoutParams();
params.height=ViewGroup.LayoutParams.WRAP_CONTENT;
activity.recyclerView.setLayoutParams(params);
}
}

How can we scroll parent layout while scrolling recyclerview android

Please help me with the following situation.
I am developing an application where in one page I have a Linearlayout with a background image and RecyclerView with list of names.What I need is when i scroll up the RecyclerView I need the LinearLayout above also to move up so that the list in the recyclerView does not go under the LinearLayout above and when I scroll down the RecyclerView I need the LinearLayout above to scroll down so that we could see the image fully.
What i have done already is I used the setOnScrollListener of recyclerview and in the onScrolled() function I am getting the scrolling down and scrolling up event.But now i am stuck how to proceed further.
Below is the layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<include layout="#layout/toolbar"
android:id="#+id/toolbar" />
<android.support.v7.widget.CardView
android:id="#+id/cardview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/toolbar"
android:layout_margin="8dp"
card_view:cardBackgroundColor="#android:color/white"
card_view:cardCornerRadius="8dp">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/scrollview"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="5"
android:orientation="vertical">
<LinearLayout
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:background="#drawable/hydeparkmap"
android:layout_weight="3" ></LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:scrollbars="vertical" />
</LinearLayout>
</ScrollView>
</android.support.v7.widget.CardView>
</RelativeLayout>
Here is the code, i used in corresponding java class:
#InjectView(R.id.scrollview)
ScrollView scrollview;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shoplist);
ButterKnife.inject(this);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setTitle("ShopList");
scrollview.setVerticalScrollBarEnabled(true);
lm=new LinearLayoutManager(ShopListActivity.this);
recyclerView.setLayoutManager(lm);
firstVisibleInListview = lm.findFirstVisibleItemPosition();
adapter = new RecyclerViewAdapter(ShopListActivity.this, getData());
recyclerView.setAdapter(adapter);
recyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(ShopListActivity.this, new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
Intent intent1 = new Intent(ShopListActivity.this, ShopProductListActivity.class);
intent1.putExtra("position", String.valueOf(position));
intent1.putExtra("shopname", it.get(position).getTitle());
intent1.putExtra("shopimage", String.valueOf(it.get(position).getImgIcon()));
intent1.putExtra("subcategory", subcategory);
startActivity(intent1);
}
})
);
recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int currentFirstVisible = lm.findFirstVisibleItemPosition();
if(currentFirstVisible > firstVisibleInListview){
Toast.makeText(getBaseContext(),"Scrolled up ",Toast.LENGTH_SHORT).show();
scrollview.fullScroll(ScrollView.FOCUS_UP);
}
else
Toast.makeText(getBaseContext(),"Scrolled down ",Toast.LENGTH_SHORT).show();
firstVisibleInListview = currentFirstVisible;
}
});
}

so if I understand your question completely, you some View that should scroll with
RcyclerView.
if so in this situation you should delete your ScrollView cause RecyclerView have that within itself. what I write here is step by step guide to put a header( not sticky) in top of your RecyclerView so they would scroll together:
1- first you need to create a layout containing your header in my case i had an image for header so it looked like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#mipmap/winter"/>
</LinearLayout>
let's call this header_layout
2- you need to implement another method of RecyclerAdapter called getItemViewType it's output would be in as second parameter onCreateViewHolder(ViewGroup parent,int viewType) here you inflate the layout for each kind of view you need( for me these two look like this) :
#Override
public int getItemViewType(int position){
if(position == 0){
return 0;
} else {
return 1;
}
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
if(viewType==1){
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.report_row_layout, parent, false);
} else {
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.report_header_layout, parent, false);
}
return new MyViewHolder(itemView);
}
note that my first position (header) differs and other are the same you could have multiple views for multiple positions.
3- you should change your onBindViewHolder if needed in my case I needed to make it do nothing for my first position
4- remove your ScrollView and implement the layouts in positions and your main layout should look like this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<include layout="#layout/toolbar"
android:id="#+id/toolbar" />
<android.support.v7.widget.CardView
android:id="#+id/cardview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/toolbar"
android:layout_margin="8dp"
card_view:cardBackgroundColor="#android:color/white"
card_view:cardCornerRadius="8dp">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v7.widget.CardView>
</RelativeLayout>
I don't know what your CardView is doing but delete it if you think it's not needed. if you need you can make your header a LinearLayout or anything else.
hope this helps.