ScrollView

In Android, a ScrollView is a view group that is used to make vertically scrollable views. A scroll view contains a single direct child only. In order to place multiple views in the scroll view, one needs to make a view group(like LinearLayout) as a direct child and then we can define many views inside it. A ScrollView supports Vertical scrolling only, so in order to create a horizontally scrollable view, HorizontalScrollView is used. 

Here is example :

Step 1: Create a new project

1. Click on File, then New => New Project.

2. Choose “Empty Activity” for the project template.

3. Select language as Kotlin.

4. Select the minimum SDK as per your need.

Step 2: Modify strings.xml 

Add some strings inside the strings.xml file to display those strings in the app.

<resources>

    <string name="app_name">gfgapp_scrollview</string>

    <string name="scrolltext">Kotlin is a statically typed,

                 general-purpose programming language developed

                 by JetBrains, that has built world-class IDEs 

                 like IntelliJ IDEA, PhpStorm, Appcode, etc.

                 It was first introduced by JetBrains in 2011 

                 and a new language for the JVM. Kotlin is 

                 object-oriented language, and a “better language” 

                 than Java, but still be fully interoperable

                 with Java code. Kotlin is sponsored by Google, 

                 announced as one of the official languages for 

                 Android Development in 2017. 

                 Advantages of Kotlin language:

                 Easy to learn – Basic is almost similar to java.

                 If anybody worked in java then easily understand

                 in no time. Kotlin is multi-platform – Kotlin is

                 supported by all IDEs of java so you can write 

                 your program and execute them on any machine

                 which supports JVM. It’s much safer than Java.

                </string>

</resources>

Step 3: Modify activity_main.xml 

Add the ScrollView and inside the ScrollView add a TextView to display the strings that are taken in the strings.xml file.

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.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:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <ScrollView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        tools:layout_editor_absoluteX="0dp"

        tools:layout_editor_absoluteY="-127dp">

        <TextView

            android:id="@+id/scrolltext"

            style="@style/AppTheme"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:text="@string/scrolltext"

            android:textColor="@color/green"/>

    </ScrollView>

</androidx.constraintlayout.widget.ConstraintLayout>

As already mentioned above, Scrollview can only contain one direct child. In this case, the child is textview. On noticing this textview you will realize that the text added inside textview is mentioned as @string/scrolltext which refers to a string resource inside the strings.xml file.

Step 4: MainActivity file in the Android Application

import android.os.Bundle;

import androidx.activity.EdgeToEdge;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.graphics.Insets;

import androidx.core.view.ViewCompat;

import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

}