How to implement RecyclerView with vertical and horizontal list using NestedScrollView in Android using Kotlin.

Last updated Jan 09, 2022

In this android example tutorial, we will see how to implement RecyclerView with vertical and horizontal list with NestedScrollView in Android using Kotlin.

Recyclerview: RecyclerView is a more advanced and adaptable version of the listview and gridview. It's a container for presenting
large amounts of data sets in a way that allows them to be browsed quickly while limiting the number of views. It has the ability to reuse its views.

What is NestedScrollView?
NestedScrollView is similar to ScrollView, except it may act as both a nested scrolling parent and child on both new and old Android versions. It is turned on by default. NestedScrollView is used when a scrolling view has to be nested inside another scrolling view.

Implementation of NestedScrollView on Recyclerview:

Step 1. Create a new Project in android studio.

Go to File > New > New Project > Empty Activity > Next > Enter Name > Select Language Kotlin > Finish.

Step 2. Add the RecyclerView dependency to build.gradle(app).

implementation 'androidx.recyclerview:recyclerview:1.2.1'

Step 3. Go to activity_main.xml file and add the following xml code:

<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Horizonatal View"
android:textSize="19sp"
android:textColor="@color/purple_700"></TextView>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/horizontal_rv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Vertical View"
android:layout_marginTop="10dp"
android:textSize="19sp"
android:textColor="@color/purple_700"></TextView>

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/vertical_rv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>

</LinearLayout>

Above xml code will show you given layout:

Android Recyclerview with Horizontal and vertical

Step 4. Create a new layout resource file and add the following code

app > res > layout > new > layout resource file > enter name (layout_items) > ok

Code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="200dp"
android:layout_height="200dp"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:padding="10dp">

<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:cardCornerRadius="19dp">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="centerCrop" />
</androidx.cardview.widget.CardView>

</LinearLayout>

Step 5. Create a new Kotlin class for model

app > java > package name > right-click > New > Kotlin class/file (RecyclerModel > enter name > OK

This file will hold the information of every item which you want to show in your RecyclerView.

Code:

class RecyclerModel(val image : Int) {

}

Step 6. Create a adapter class

app > java > package name > right-click > New > Kotlin class/file (RecyclerAdapter) > enter name > ok

This class contains some important functions to work with the RecyclerView these are as follows:

onCreateViewHolder(): This function sets the views to display the items.
onBindViewHolder(): This function is used to bind the list items to our widgets such as TextView, ImageView, etc.
getItemCount(): It returns the count of items present in the list.

Code:

class RecyclerAdapter(private val dataList: List) : RecyclerView.Adapter() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerAdapter.ViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.layout_items, parent, false)
return ViewHolder(view)
}

override fun onBindViewHolder(holder: RecyclerAdapter.ViewHolder, position: Int) {
val recyclerModel = dataList[position]

// Image set to the imageview widget
holder.imageView.setImageResource(recyclerModel.image)
}

override fun getItemCount(): Int {
return dataList.size
}
class ViewHolder(ItemView: View) : RecyclerView.ViewHolder(ItemView) {
val imageView: ImageView = itemView.findViewById(R.id.imageView)
}

}

Step 7. Go to MainActivity.kt file and add the following code

Initialize the both horizontal and vertical recyclerView widget below setContentView(R.layout.activity_main).

val horizontalRv = findViewById(R.id.horizontal_rv)
val verticalRv = findViewById(R.id.vertical_rv)

Create a ArrayList of type recyclerModel and insert the data:

// ArrayList of class RecyclerModel
val data = ArrayList()

// Inserting data in arrayList
data.add(RecyclerModel(R.drawable.image1))
data.add(RecyclerModel(R.drawable.image2))
data.add(RecyclerModel(R.drawable.image8))
data.add(RecyclerModel(R.drawable.image4))
data.add(RecyclerModel(R.drawable.image5))
data.add(RecyclerModel(R.drawable.image6))
data.add(RecyclerModel(R.drawable.image7))
data.add(RecyclerModel(R.drawable.image3))

// This will pass the ArrayList to our Adapter
val adapter = RecyclerAdapter(data)

   // For showing data list horizontally
horizontalRv.layoutManager = LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false)

// For showing data list vertically
verticalRv.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)

// Setting the Adapter with the horizontal and vertical recyclerview
horizontalRv.adapter = adapter
verticalRv.adapter = adapter

Code:

class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val horizontalRv = findViewById(R.id.horizontal_rv)
val verticalRv = findViewById(R.id.vertical_rv)

val data = ArrayList()
data.add(RecyclerModel(R.drawable.image1))
data.add(RecyclerModel(R.drawable.image2))
data.add(RecyclerModel(R.drawable.image8))
data.add(RecyclerModel(R.drawable.image4))
data.add(RecyclerModel(R.drawable.image5))
data.add(RecyclerModel(R.drawable.image6))
data.add(RecyclerModel(R.drawable.image7))
data.add(RecyclerModel(R.drawable.image3))

val adapter = RecyclerAdapter(data)

// For showing data list horizontally
horizontalRv.layoutManager = LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false)
horizontalRv.adapter = adapter

// For showing data list vertically
verticalRv.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
verticalRv.adapter = adapter

}
}

Step 8. Now run the app in your emulator, and get the following output.

Output:

Android Recyclerview with Horizontal and vertical 2

Android Recyclerview with Horizontal and vertical 3

Complete source code of NestedScrollView with Example:

activity_main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
android:padding="10dp"
tools:context=".MainActivity">

</LinearLayout>

MainActivity.kt file

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView

val adapter = RecyclerAdapter(data)

// For showing data list horizontally
horizontalRv.layoutManager = LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false)
horizontalRv.adapter = adapter

// For showing data list vertically
verticalRv.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
verticalRv.adapter = adapter

}
}

layout_items.xml file

</LinearLayout>

RecyclerModel.kt file

class RecyclerModel(val image : Int) {

}

RecyclerAdapter.kt file

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import androidx.recyclerview.widget.RecyclerView

override fun onBindViewHolder(holder: RecyclerAdapter.ViewHolder, position: Int) {
val recyclerModel = dataList[position]

// Image set to the imageview widget
holder.imageView.setImageResource(recyclerModel.image)
}

override fun getItemCount(): Int {
return dataList.size
}
class ViewHolder(ItemView: View) : RecyclerView.ViewHolder(ItemView) {
val imageView: ImageView = itemView.findViewById(R.id.imageView)
}

}

build.gradle(app) file

plugins {
id 'com.android.application'
id 'kotlin-android'
}

android {
compileSdk 31

defaultConfig {
applicationId "com.nishajain.nestedscrollviewkotlin"
minSdk 21
targetSdk 31
versionCode 1
versionName "1.0"

testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
}

dependencies {

implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'androidx.recyclerview:recyclerview:1.2.1'
}

Conclusion: In this article we have covered how to implement NestedScrollView on Recyclerview with Horizontal and Vertical List in Android Using Kotlin.

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