Develop Reference

Add View at top of recycler view

In my android application, there is a slideshow at top of page and below it, there is a recycler view, my problem is how to add the slideshow above recycler view in a way that slideshow can be scrolled with recycler view. I tried adding a scroll view as a parent but it seems that recycler lost the recycling power.
<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:background="#ececec">
<android.support.v4.view.ViewPager
android:id="#+id/ChefFragmentViewPager"
android:layout_width="match_parent"
android:layout_height="220dp"
android:layout_alignParentTop="true" />
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ChefFragmentViewPager"
android:background="#ececec"
android:scrollbars="none" />
</RelativeLayout>

Try using NestedScrollView instead of ScrollView and also set recyclerView.setNestedScrollingEnabled(false); programmatically.

Try this code and let me know if it helped you or not:
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<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:background="#ececec">
<android.support.v4.view.ViewPager
android:id="#+id/ChefFragmentViewPager"
android:layout_width="match_parent"
android:layout_height="220dp"
android:layout_alignParentTop="true" />
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/ChefFragmentViewPager"
android:background="#ececec"
android:scrollbars="none" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>

How to make ScrollView scroll smoothly

I want to use RecycleView in ScrollView, but when I do so my scrolling view fixes the moment I stop scrolling. How to make it more smooth?
Here is my xml file used:
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"/>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fastScrollEnabled="true"
android:layout_marginTop="143dp"
android:scrollbars="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</ScrollView>

NestedScrollView could not scroll with match_parent height child

I implement NonSwipeableViewPager with a fragment has NestedScrollView like this, what I expect is that the scrollview can scroll up and show 2 textviews:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="match_parent"
layout="#layout/header" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="16dp"
android:src="#drawable/ic_up" />
</RelativeLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text 1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text 2" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
But it could not scroll, I tried many ways but still did not get any solution

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
This linearlayout should have android:layout_height="wrap_content".
Reason for that is that if the scrollview's child is the same size as the scrollview itself (both match_parent for height) it means that there is nothing to scroll through, since they are of same size and the scrollview will only be as high as the screen.
If the linearlayout has a height of wrap_content then the height is not related to the height of the screen and the scrollview will be able to scroll through it.
Just remember that a scrollview can only have 1 direct child, and that child needs android:layout_height="wrap_content"

In my case app:layout_behavior="#string/appbar_scrolling_view_behavior" this is working only if some one face problem will be try it and may be solve your problem too. you should add also android:fillViewport="true" but without this my code working.
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#drawable/subscription_background"
app:layout_behavior="#string/appbar_scrolling_view_behavior">

For me it worked when i added "android:layout_marginBottom="100dp"" for last child in androidx.core.widget.NestedScrollView

if you have used netedscrollview as follow you have to use
android:scrollbars="vertical"
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="#id/toolbar_updateUserDetails"
app:layout_constraintBottom_toBottomOf="parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:scrollbars="vertical"
>
</LinearLayout>
</androidx.core.widget.NestedScrollView>

You have to calculate your other child because last child binding on nestedScrollView. You add margin like child height. It is working.

How can I add horizontal, vertical RecyclerView inside a vertical scroll

I want to add vertical as well as horizontal RecyclerViews inside a vertical scrollview.
Is it possible to have multiple recycler views inside vertcal scrollview
what control I need to use.
Also RecyclerView nested in one ScrollView is not good practice so can anybody tell me whats right way to do it can I add RecyclerView inside another RecyclerView or I need to use horizontal and vertical scrollview only to achieve this.

You can do something like this for getting two RecyclerView nested in one ScrollView which is by the way not recommended.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/tools"
android:focusableInTouchMode="true"
android:padding="8dp"
android:background="#drawable/old_map"
android:layout_height="match_parent">
<ScrollView
android:layout_below="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:scrollbars="none">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="600dp">
<view
android:scrollbarSize="6dp"
android:id="#+id/recent_post"
class="android.support.v7.widget.RecyclerView"
android:layout_width="match_parent"
android:layout_height="400dp"
android:scrollbars="vertical" />
<view
android:scrollbarSize="6dp"
android:id="#+id/recent_post"
class="android.support.v7.widget.RecyclerView"
android:layout_width="match_parent"
android:layout_height="400dp"
android:scrollbars="horizontal" />
</RelativeLayout>
</ScrollView>
</RelativeLayout>

I don't namely know what kind of scrolling do you want but it is possible to use both scrolls at the same time:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<HorizontalScrollView
android:id="#+id/HorizontalScrollView02"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<!-- HERE YOUR CODE-->
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
</ScrollView>

RecyclerView can't scroll up when embed under RelativeView and SwipeToRefresh

I have the below layout.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/my_swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
It's basically having a recyclerView embedded in a SwipeToRefresh. This works well where I could scroll my recyclerView up and down. When reaching the top, and I pull down, the Refresh Happens.
Given I need to add an empty View dynamically, I have wrap the Empty View and RecyclerView under the RelativeLayout. This is as below.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/my_swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<include
android:id="#+id/my_empty_view"
layout="#layout/fragment_empty_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
</RelativeLayout>
</android.support.v4.widget.SwipeRefreshLayout>
By adding this RelativeLayout between the RecyclerView and SwipeToRefreshLayout, the RecyclerView can only scroll down. It can not scroll up anymore, as whenever I try to scroll up, the SwipeToRefresh take place instead.
Why is this a problem? Is there any way to solve the problem while retaining my layout?
Thanks!

A scrollable view must be embedded in a SwipeRefreshLayout immediately.So you can let the RelativeLayout be embedded in a ScrollView and the ScrollView is embedded in the SwipeRefreshLayout.
Like this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/my_swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<include
android:id="#+id/my_empty_view"
layout="#layout/fragment_empty_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
</RelativeLayout>
</ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>