DynamicHorizontal ScrollView in Kotlin

Android ScrollView allows multiple views that are places within the parent view group to be scrolled. Scrolling in the android application can be done in two ways either Vertically or Horizontally. In this article, we will be discussing how to programmatically create a Horizontal ScrollView in Kotlin . Let’s start by first creating a project in Android Studio. To do so, follow these instructions:

• Click on File, then New and then New Project and give name whatever you like
• Then, select Kotlin language Support and click next button.
• Select minimum SDK, whatever you need.
• Select Empty activity and then click finish.

Modify activity_main.xml file

Here, we will use the RelativeLayout to get the Scroll View from the Kotlin file. 

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:id="@+id/layout"
            android:layout_centerInParent="true"/>

   </RelativeLayout>

Update the strings.xml file

XML

<resources>
    <string name="app_name">DynamicHorizontal ScrollView</string>
</resources>

Add Images

We need to add some images which can be used for scrolling purpose. So, we have to copy the images from our local computer path to app/res/drawable folder.

Create Horizontal ScrollView in MainActivity.kt file

Open app/src/main/java/yourPackageName/MainActivity.kt. In this file, we declare a variable horizontalScrollView to create the Horizontal ScrollView widget like this:

 val horizontalScrollView = HorizontalScrollView(this)
    //setting height and width
    val layoutParams = LinearLayout.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT, 
                        ViewGroup.LayoutParams.MATCH_PARENT)
    horizontalScrollView.layoutParams = layoutParams

then, add the widget in layout using this

   val linearLayout1 = findViewById(R.id.layout)
       linearLayout1?.addView(horizontalScrollView)

Java

package com.geeksforgeeks.myfirstkotlinapp

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.ViewGroup
import android.widget.HorizontalScrollView
import android.widget.ImageView
import android.widget.LinearLayout
import android.widget.RelativeLayout

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        val horizontalScrollView = HorizontalScrollView(this)
        //setting height and width
        val layoutParams = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT)
        horizontalScrollView.layoutParams = layoutParams

        val linearLayout = LinearLayout(this)
        //setting height and width
        val linearParams = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        linearLayout.layoutParams = linearParams

        //adding horizontal scroll view to the layout
        horizontalScrollView.addView(linearLayout)

        val image1 = ImageView(this)
        //setting height and width
        val params1 = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        image1.layoutParams = params1
        //accessing images that we downloaded and copied to
        // drawable folder and setting it to imageview
        image1.setImageResource(R.drawable.img1)
        linearLayout.addView(image1)

        val image2 = ImageView(this)
        //setting height and width
        val params2 = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        image2.layoutParams = params2
        //accessing images that we downloaded and copied to
        // drawable folder and setting it to imageview
        image2.setImageResource(R.drawable.img2)
        linearLayout.addView(image2)

        val image3 = ImageView(this)
        //setting height and width
        val params3 = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        image3.layoutParams = params3
        //accessing images that we downloaded and copied to
        // drawable folder and setting it to imageview
        image3.setImageResource(R.drawable.img3)
        linearLayout.addView(image3)

        val image4 = ImageView(this)
        //setting height and width
        val params4 = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        image4.layoutParams = params4
        //accessing images that we downloaded and copied to
        // drawable folder and setting it to imageview
        image4.setImageResource(R.drawable.img4)
        linearLayout.addView(image4)

        val image5 = ImageView(this)
        //setting height and width
        val params5 = LinearLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT)
        image5.layoutParams = params5
        //accessing images that we downloaded and copied to
        // drawable folder and setting it to imageview
        image5.setImageResource(R.drawable.img5)
        linearLayout.addView(image5)


        //accessing the relative layout where the scrollview will be active
        val linearLayout1 = findViewById<RelativeLayout>(R.id.layout)
        linearLayout1?.addView(horizontalScrollView)

    }
}

AndroidManifest.xml file

Java

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.geeksforgeeks.myfirstkotlinapp">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

Run as Emulator:

Here, is the video of scrolling horizontally in the android application.