Develop Reference

Two recycleviews in one activity scroll problem

I have created 2 recycleviews in one activity. One scrolls horizontally while other scrolls vertically. I can scroll correctly inside each RecyclerView but the page as a whole won't scroll i.e. top RecyclerView stays at the top always and bottom one stays at the bottom like both are fixed in position.
<ScrollView
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:orientation="vertical"
tools:context="com.shakeelnawaz.recipes.AllRecipesFragmet">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginStart="20dp"
android:layout_marginTop="20dp"
android:text="#string/trending_recipes"
android:textSize="18sp" />
<android.support.v7.widget.RecyclerView
android:id="#+id/horizontaltrendingrecycleview"
android:layout_width="match_parent"
android:layout_height="240dp"
android:layout_marginStart="15dp"
android:orientation="horizontal"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v7.widget.RecyclerView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="#string/all_recipes"
android:textSize="18sp" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycleView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</ScrollView>
I read this post "Scolling with multiple RecyclerViews in Layout" and set vertical recycleview's height programmatically. like this
LinearLayout.LayoutParams params = new
LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
// calculate height of RecyclerView based on child count
params.height=1150;
// set height of RecyclerView
recyclerView.setLayoutParams(params);
But the problem is that how I can calculate the height of RecyclerView based on child count?

Use NestedScrollView instead of ScrollView
and use this below line in your Fragment in Activity.
ViewCompat.setNestedScrollingEnabled(mYourRecycleView, false);
This will be work on all your Android API level.

Replace ScrollView with NestedScrollView
Then add: horizontaltrendingrecycleview.isNestedScrollingEnabled = false
Your XML should look 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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
tools:context="com.shakeelnawaz.recipes.AllRecipesFragmet">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginStart="20dp"
android:layout_marginTop="20dp"
android:text="#string/trending_recipes"
android:textSize="18sp" />
<android.support.v7.widget.RecyclerView
android:id="#+id/horizontaltrendingrecycleview"
android:layout_width="match_parent"
android:layout_height="240dp"
android:layout_marginStart="15dp"
android:orientation="horizontal"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="#string/all_recipes"
android:textSize="18sp" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycleView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>

Recyclerview with fixed height wont scroll inside nested scroll view

I have a RecyclerView with a fixed height inside a NestedScrollView with a few other layouts inside it. The recycler view won't scroll, but it scrolls fine if I set its height to wrap_content.
I cannot make the RecyclerView use wrap_content because there is an issue with EndlessRecyclerViewScrollListener that it keeps loading data from the server and pushing it into my Adapter even if the user has not scrolled down at all.
Most are suggesting to set nested scrolling to false, but if I disable nested scrolling, the NestedScrollView does not allow me to scroll my RecyclerView. But if I leave nested scrolling enabled, the scroll view does not scroll unless I start touching from outside the RecyclerView.
My layout code:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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/scoop_background"
tools:context=".module.scoop.timeline.ScoopTimelineFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="92dp">
<ImageView
android:id="#+id/ivTimelineBanner"
android:layout_width="match_parent"
android:layout_height="92dp"
android:layout_margin="0dp"
android:clickable="true"
android:padding="0dp"
android:scaleType="fitXY"
android:src="#drawable/banner_placeholder" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:orientation="vertical"
android:paddingLeft="92dp">
<TextView
android:id="#+id/tvGroupMembership"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="#dimen/text_content" />
<TextView
android:id="#+id/tvGroupName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="#dimen/text_header"
android:textStyle="bold" />
<TextView
android:id="#+id/tvGroupMemberCount"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="#dimen/text_content" />
</LinearLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="#null"
android:paddingStart="#dimen/divider_normal"
android:paddingEnd="#dimen/divider_normal"
android:src="#drawable/ic_chevron_right_white_24dp" />
</LinearLayout>
</FrameLayout>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipeRefreshLayoutTimeline"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.NestedScrollView
android:id="#+id/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:overScrollMode="never"
android:scrollbars="none">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="4dp">
<android.support.v7.widget.CardView
android:id="#+id/cvCreateScoop"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/divider_small"
android:layout_marginRight="#dimen/divider_small"
android:clickable="true"
android:focusable="true"
android:foreground="?attr/selectableItemBackground"
app:cardCornerRadius="8dp"
app:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="#dimen/divider_normal">
<ImageView
android:layout_width="32dp"
android:layout_height="32dp"
android:src="#drawable/svg_nav_create_scoop" />
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:paddingStart="#dimen/divider_normal"
android:text="What's on your mind?"
android:textSize="#dimen/text_content" />
<ImageView
android:layout_width="32dp"
android:layout_height="32dp"
android:padding="#dimen/divider_xsmall"
android:src="#drawable/svg_insert_image" />
</LinearLayout>
</android.support.v7.widget.CardView>
<RelativeLayout
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:overScrollMode="never"
android:nestedScrollingEnabled="false"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:paddingBottom="4dp">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
What do I have to modify so that the RecyclerView is scrollable, but the whole NestedScrollView also scrolls along with it, so that if the user is scrolling back up (swiping from top to bottom), the RecyclerView will scroll along with the NestedScrollView, which will bring the layouts above RecyclerView.
To visualize:
The layout I'm trying to achieve is similar to that of facebook's. When you scroll down, the timeline will scroll down, and the search bar with the messenger icon at the top is also scrolled so that it is hidden when scrolling down. When you scroll up, the timeline is being scrolled back up, and showing the search bar again.

I decided to do it differently because I wasn't able to solve it with this method. Instead, I used a CollapsingToolbar and put the other layouts inside it, then removing its background so it does not look like a toolbar, and it seamlessly does what I wanted to, just with a different implementation.

focusable not working in a recyclerview - why?

Hi i have a main recyclerview which is set to vertical and inside that recyclerview i have another recyclerview which is set to horizontal and inside horizontal recyclerview i have cardview with imageview and textview, i'm currently making my layout for android t.v so in order to work this code i have to add focus in my cardview so that user can easily navigate through the cards but the issue is if i'm adding
android:focusable="true"
in my cardview nothing works, my guess is because i have 2 recyclerviews that's why cardview is not receiving focus any idea how to fix it..
Here's my code
This is my main recyclerview
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerviewMainCarousels"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="afterDescendants"/>
This is my second recyclerview
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerviewCarousel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="beforeDescendants"/>
And this is my cardview
<androidx.cardview.widget.CardView
android:id="#+id/bollyAlbumCardView"
android:foreground="?android:attr/selectableItemBackground"
app:cardBackgroundColor="#android:color/transparent"
app:cardElevation="0dp"
app:contentPadding="3dp"
app:cardUseCompatPadding="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:focusableInTouchMode="true">
<LinearLayout
android:padding="0dp"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_gravity="center_horizontal"
android:layout_width="180dp"
android:layout_height="180dp">
<com.hirazo.utilities.HZImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="ContentDescription"
android:scaleType="fitXY" />
<ImageView
android:id="#+id/playIcon"
android:visibility="gone"
android:layout_centerInParent="true"
android:src="#drawable/icon_play_new"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
<TextView
android:textSize="12sp"
android:id="#+id/title"
android:paddingTop="8dp"
android:maxLines="2"
android:ellipsize="marquee"
android:layout_width="match_parent"
android:layout_height="45dp"
android:textColor="#fff" />
</LinearLayout>
</androidx.cardview.widget.CardView>

You have to add this line of code somewhere (Adapter?)
textView.setSelected(true);

Recyclerview within a Scrollview dont coordinate

I have this activity design, which shows a card view inside a scrollView, But under that cardview I need to put a listview or recyclerview. The problem is that I need the scroll of that list to coordinate with the main scroll. Osea that when lower in the content the cardview will disappear and the list of the recyclerview or listview will be crossed.
I need all the content to respond to the main scroll to show up and disappear after titlebar, Which should I change or redesign?
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
app:cardElevation="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/post_coordinator"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/post_bg"
android:layout_width="match_parent"
android:layout_height="150dp"
android:scaleType="fitXY"
android:src="#drawable/default_profile" />
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:fabSize="normal"
android:src="#drawable/ic_hot_black"
app:layout_anchorGravity="bottom"
android:layout_marginLeft="16dp"
app:layout_anchor="#id/post_bg"
android:tint="#FFF"
/>
<com.mikhaellopez.circularimageview.CircularImageView
android:layout_width="100dp"
android:layout_height="100dp"
app:layout_anchor="#id/post_bg"
app:layout_anchorGravity="center_horizontal|bottom"
android:src="#drawable/profile"
app:civ_border_color="#FFF"
app:civ_border_width="3dp"
/>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:fabSize="normal"
android:src="#drawable/ic_hot_black"
app:layout_anchorGravity="bottom|end"
android:layout_marginRight="16dp"
app:layout_anchor="#id/post_bg"
android:tint="#FFF"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_marginTop="205dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingBottom="50dp"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Prepare your Anus Cersei Lanister, You Gonna Die"
android:textAppearance="#style/Base.TextAppearance.AppCompat.Large"
android:textColor="#2d2d2d"
android:textAlignment="center"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAlignment="center"
android:text="#string/emilia"
android:textColor="#color/secondary_text"
android:layout_marginTop="10dp"
/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
</android.support.v7.widget.CardView>
<ListView
android:id="#+id/post_comments"
android:layout_marginTop="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
</ListView>
</LinearLayout>
</ScrollView>

Add your recyclerview inside NestedScrollview.
Also add recyclerview.setNestedScrollingEnabled(false);

Use android:fillViewport="true" to your ScrollView. ListView that located inside ScrollView works properly.
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">

I'd recommend putting the CardView inside the RecyclerView as a header, and then you don't need the top ScrollView, the card and the list items would all be scrollable within the RecyclerView.
There are many ways to add a header to a RecyclerView, see here:
Is there an addHeaderView equivalent for RecyclerView?

Layout not showing under listview within ScrollView

I have a layout with 1 layout inside of it which is all inside a ScrollView. I am trying to get the whole screen to scroll with the content inside of the listview then the textviews underneath that listview. I get the whole listview to populate and show correctly but the bottom layout with all the textviews do not show up.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/app_bar"
layout="#layout/app_bar" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:layout_below="#id/app_bar">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp">
<ImageView
android:id="#+id/bannerReceiptLogo"
android:layout_width="170dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp"
android:background="#drawable/img_logo_receipt_cub" />
<TextView
android:id="#+id/bannerAddressHeader"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_below="#id/bannerReceiptLogo"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:text="#string/storeHeader"
android:textAlignment="center"
android:textSize="18sp" />
<ListView
android:id="#+id/fullEReceiptListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/bannerAddressHeader"
android:layout_marginTop="10dp"
android:scrollbars="none"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_below="#id/fullEReceiptListView"
android:layout_weight="1">
<View
android:id="#+id/totalDivider"
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#color/colorGrey"
/>
<TextView
android:id="#+id/txtSubTotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SUBTOTAL"
android:textSize="20sp"
android:layout_below="#+id/totalDivider"/>
<TextView
android:id="#+id/txtSubTotalFinal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="$13.58"
android:layout_alignParentRight="true"
android:textSize="20dp"
android:layout_below="#+id/totalDivider"/>
<TextView
android:id="#+id/txtTaxText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TAX"
android:textSize="20sp"
android:layout_below="#+id/txtSubTotal"/>
<TextView
android:id="#+id/txtTaxTotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="$0.80"
android:layout_alignParentRight="true"
android:textSize="20dp"
android:layout_below="#+id/txtSubTotalFinal"/>
<TextView
android:id="#+id/txtCompleteTotal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TOTAL"
android:textSize="20sp"
android:layout_below="#+id/txtTaxText"/>
<TextView
android:id="#+id/txtCompleteTotalNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="$14.38"
android:layout_alignParentRight="true"
android:textSize="20dp"
android:layout_below="#+id/txtTaxText"/>
</RelativeLayout>
</RelativeLayout>
</ScrollView>
</RelativeLayout>

Do not put ListView inside ScrollView. ListView is a widget that is already scrollable. See NestedScrollView from Support library.

If you set the ListView height to wrap_content the height will have the height to comport all items. That way, the below content will be pushed away.
However Android don't have a great support for nested scrolls, it's considered a bad practice. This way, your ListView will not have the native scroll feature, and will need some hack to work as expected.
A better workaround is use the NestedScrollView, so you scroll may work (maybe you will need put your ListView inside another parent to control the height)

change ListView's layout_height to wrap_content