When I put RecyclerView inside NestedScrollView then onBindViewHolder is calling for all row like say I have list which has size of 30 then onBindViewHolder is called for all 30 rows at one time even without scrolling
RecyclerView list;
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
list.setLayoutManager(layoutManager);
layoutManager.setAutoMeasureEnabled(true);
list.setNestedScrollingEnabled(false);
list.addItemDecoration(new VerticalSpaceItemDecoration(5));
list.setAdapter(adapter);
my xml is
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:scrollbars="none"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/grey">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_views"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/info"
android:layout_marginBottom="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:textAlignment="center"
android:visibility="visible"
/>
but if I remove NestedScrollView it's working properly.
I'm going to assume that since your are using appbar_scrolling_view_behavior you are trying to do something with AppBarLayout.
If so, you can use RecyclerView as a direct child of CoordinatorLayout and have support for AppBarLayout scrolling without nesting RecyclerView inside of NestedScrollView.
Try this: RecyclerView inside CoordinatorLayout (with AppBarLayout and CollapsingToolbarLayout):
<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.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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="#55FF00FF"
app:layout_collapseMode="none"/>
</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>
And in your Activity or CustomView:
RecyclerView list;
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
list.setLayoutManager(layoutManager);
list.addItemDecoration(new VerticalSpaceItemDecoration(5));
list.setAdapter(adapter);
But you set android:layout_height for NestedScrollView to wrap_content - here, it's zero by default (because there no content for him at the moment of the declaration). Next, for RecyclerView you set android:layout_height to match_parent - which is at the moment is 0. Thus, all your items have 0 height.
Thus, you have such situation.
Solution: use solution above from #dkarmazi https://stackoverflow.com/a/37558761/3546306 or try to change parameter android:layout_height values.
It's right.Because you are using a ScrollView.ScrollView is not recyclable like RecyclerView or ListView.It will show all view contains these out of screen in one time.You should use a other layout instead.
I faced the same issue. After a bit of research fount the solution.
You need to make sure your recyclerview height is fixed by setting it to MATCH_PARENT. Or if its in a contraint layout then set height to 0dp and set the required height constrains.
Then set recyclerview.setHasFixedSize to true.
The onBindViewHolder will start getting called after this.
Related
I have a row that has a recyclerview inside another recyclerview, like this image
I need the inner recyclerview to be able to scroll it, I have tried this (this is inside a ConstrainLayout)
<androidx.core.widget.NestedScrollView
android:id="#+id/nested_scroll"
android:layout_width="match_parent"
android:layout_height="150dp"
android:fillViewport="true"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_order_items"
android:layout_width="match_parent"
android:layout_height="0dp" />
</androidx.core.widget.NestedScrollView>
And
rv_order_items.isNestedScrollingEnabled = true
But I cant scroll inside the inner recyclerview, any suggestion?
Please add whole code of your layout in this post so I will get idea about constraintlayout.
Otherwise this is solution if you want full screen to scroll...
Please set android:layout_height="match_parent" of NestedScrollView
<androidx.core.widget.NestedScrollView
android:id="#+id/nested_scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
I'm making an app, which contains a recyclerView with some items in it. The app uses a BottomNavigationView, and three other fragments to show some content.
Now, one of those fragments contains just a RecyclerView and isn't scrolling.
I already tried some things, like changing the height of the RecyclerView from match_parent to wrap_content, wrapping it with a LinearLayout, using a NestedScrollView or regular ScrollView, adding app:layout_behavior and even android:scrollbars. Nothing worked though.
The XML file of the layout with the list which isn't scrolling in it:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="55dp">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_users"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
I set the ConstrainedLayout below as the parent of the other Fragment, this also contains the BottomNavigationView (this is generated by Android Studio when I created the project btw):
<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:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="0dp"
android:layout_marginStart="0dp"
android:background="#color/colorPrimary"
app:itemIconTint="#drawable/bottom_nav_selector"
app:itemTextColor="#drawable/bottom_nav_selector"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/navigation" />
</android.support.constraint.ConstraintLayout>
Finally, this is inside the Fragment's class, where I set the RecyclerView:
adapter = new UserListAdapter(list, getContext(), getLayoutInflater(), container);
RecyclerView recyclerView = v.findViewById(R.id.rv_users);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(adapter);
I hope one of you guys can help me!
Have you enough data to list on recycler for scrolling?
I am using the following layout, but unable to get the RecyclerView to scroll(it is not visible on the screen when using this layout, scrolling stops till the NestedScrollView).
I can scroll up to the NestedScrollView and the CollapsingToolbar to collapse, if I remove the entire NestedScrollView then I get the RecyclerView to scroll.
If I keep the linear layout without the NestedScrollView, only the RecyclerView scrolls, the rest of the layout is fixed.
I have also added app:layout_behavior="#string/appbar_scrolling_view_behavior" to the RecyclerView, and have kept the RecyclerView out of the NestedScrollView.
If I add the RecyclerView inside the NestedScrollView, the RecyclerView does not appear.
<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"
tools:context="com.example.MainFragment">
<!-- android.support.design.widget.AppBarLayout here
with a android.support.design.widget.CollapsingToolbarLayout
-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<!-- more layout code here -->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/large_text"/>
</RelativeLayout>
<View
android:id="#+id/separator"
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/colorAccent" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerViewListOfData"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:listitem="#layout/recycler_view"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</LinearLayout>
Ok, if you want to add RecyclerView inside NestedScrollView add this line into RecyclerView in xml file app:layoutManager="LinearLayoutManager".
Example
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/your_recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layoutManager="LinearLayoutManager"/>
</android.support.v4.widget.NestedScrollView>
Then in your SomeActivity.java file where you populate RecyclerView put this line recyclerView.setNestedScrollingEnabled(false); before you setting adapter to RecyclerView.
Example
RecyclerView recyclerView=(RecyclerView)findViewById(R.id.your_recyclerview);
recyclerView.setNestedScrollingEnabled(false);
recyclerView.setAdapter(yourAdapter);
I solved it by nesting RecyclerView inside the NestedScrollView and updating the support library for recyclerview
I was using com.android.support:recyclerview-v7:23.0.1
as of Android Support Library, revision 23.2.0 (February 2016)
(refer revision archive here)
Changes for v7 RecyclerView library:
RecyclerView now has an opt-in feature called AutoMeasure which allows RecyclerView.LayoutManager to easily wrap content or
handle various measurement specifications provided by the parent of
the RecyclerView. It supports all existing animation capabilities of
the RecyclerView.
If you have a custom RecyclerView.LayoutManager, call setAutoMeasureEnabled(true) to start using the new AutoMeasure API.
All built-in RecyclerView.LayoutManager objects enable auto-measure by
default.
RecyclerView.LayoutManager no longer ignores some RecyclerView.LayoutParams settings, such as MATCH_PARENT in the scroll
direction.
Note: These lifted restrictions may cause unexpected behavior in your
layouts. Make sure you specify the correct layout
parameters.
Using com.android.support:recyclerview-v7:23.4.0 solves the problem of nested recyclerview not appearing in nested scroll view
I have:
1.Coordinator layout
2.appbar layout (child of Coordinator layout)
3.Collapsing toolbar layout (child of app bar)
4.NestedScrollView (child of coordinator)
I want to put a grid view inside NestedScrollView so that user can scroll over the entire screen space.
My problem is that currently the gridview occupies a small portion of the NestedScrollView and not full space of NestedScrollView and scrolls inside that portion,like in this image:
As you can see my gridview height is limited upto only that highlighted portion in sky blue color, i want that to occupy the entire screen space below that image(which is my Collapsing toolbar).i tried different ways but nothing works out.
my xml file is:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:id="#+id/app_bar"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="196dp"
android:background="#3f51b5"
app:contentScrim="#color/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/imageview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/index"
app:layout_collapseMode="parallax" />
<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"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<GridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="1dp"
android:layout_marginRight="1dp"
android:id="#+id/gridView"
android:verticalSpacing="1dp"
android:horizontalSpacing="1dp"
android:numColumns="2"
android:stretchMode="columnWidth"/>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|bottom"
android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
GridView already has scrolling built in, so it conflicts with a NestedScrollView. You should be using a RecyclerView with a GridLayoutManager and appbar_scrolling_view_behavior layout behavior in place of the NestedScrollView.
well i had the same issue , the following worked for me.
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:fillViewport="true">
It is true, that GridView conflicts with the NestedScrollView and the correct solution would be to use the RecyclerView, but I needed a quick workaround with such setup and came across a solution using a custom class extending the GridView:
https://gist.github.com/jiahuang/2591977
Then you just have to replace your GridView with the custom class and set the parameter of NestedScrollView as in Apoorv's answer:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:fillViewport="true">
Apoorv Singh's answer helped me, but not fully. You can put a GridView inside a NestedScrollView, but only the 1st row will show up. You need to add the android:fillViewport="true" inside the NestedScrollView definition in order for everything to display properly.
But, when I scroll down, it doesn't scroll past the bottom of the screen. I have a grid with 10 rows, there are multiple rows not on screen, but I cannot scroll down to view them now.
Answer:
This worked for me now. Use RecyclerView with GridLayoutManager instead of GridView. As Recycler view is compatible with Collapsing toolbar as well. And when you use RecyclerView inside NestedScrollView, it works well. Everything sizes correctly, as well as scrolls correctly.
Inside NestedScrollView add this one line code
android:fillViewport="true"
I have to create vertical RecyclerView with nested horizontal RecyclerView in every item. Everything is within CoordinatorLayout. When I scroll by tapping outside nested RecyclerView toolbar hides, but when I scroll parent Recycler by tapping on nested one toolbar stays.
Any help would be appreciated.
Here is my xml layouts:
main_activity.xml:
<android.support.design.widget.CoordinatorLayout
...>
<FrameLayout
android:id="#+id/fragment_frame"
...
android:fitsSystemWindows="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.AppBarLayout
...
android:fitsSystemWindows="true"
android:id="#+id/appbar_layout">
<include layout="#layout/toolbar"/>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
Here is toolbar.xml :
<android.support.v7.widget.Toolbar
android:id="#+id/main_toolbar"
...
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|enterAlways">
<TextView .../>
</android.support.v7.widget.Toolbar>
fragment.xml:
<android.support.v7.widget.RecyclerView
...
android:scrollbars="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
And recycler_view_item.xml:
<RelativeLayout ...>
<TextView .../>
<!-- fixme(CullyCross) fix bug with hiding toolbar -->
<android.support.v7.widget.RecyclerView
...
android:scrollbars="horizontal"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</RelativeLayout>
Thanks,
Anton
As requested here is the solution I found good enough so far:
In my case I have a nestedScrollView with 4 RecyclerViews set to scroll horizontally inside. For each of those RecyclerViews I have done this programatically:
restaurantsRecylerView.setHasFixedSize(true);
restaurantsRecylerView.setNestedScrollingEnabled(false);
You probably don't want the fixedSize, not sure if it will make any difference, my list is always 25 so I can use that for performance. After having done this I can scroll without issues even when I touch on the recyclerViews
Hope it helps
Try with RecyclerView inside android.support.v4.widget.NestedScrollView.
<android.support.v4.widget.NestedScrollView
android:id="#+id/nScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Set other views of your Layout -->
</android.support.v4.widget.NestedScrollView>
Also try with different layout_scrollFlags in Toolbar and
RecylerView.setNestedScrollingEnabled(false); // set it true or false as per requirement
We can achieve this in XML
android:nestedScrollingEnabled="false"