TextView in Kotlin

Android TextView is simply a view that are used to display the text to the user and optionally allow us to modify or edit it. First of all, open Kotlin project in Android Studio. Following steps are used to create

Steps to Implement TextView

Steps by Step implementation for creating an application which contains TextView in Kotlin and pop-up toast when clicked on the text.

Step 1: Create a new Kotlin Android Application

To create a new project in Android Studio follow these steps:

• Click on File, then New, and then New Project, and give a name whatever you like.
• Choose “Empty Activity” for the project template.
• Then, select Kotlin language Support and click the next button.
• Select minimum SDK(According to the application need).

Step 2: Modification in activity_main.xml file

Open activity_main.xml file and create a TextView using id textView.

activity_main.xml:

<?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:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/text_view_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="40sp"
        android:text="GeeksForGeeks"
        android:textColor="#008000"
        android:textSize="40dp"
        android:textStyle="bold" />
</LinearLayout>

Design UI:

Step 3: Modification in MainActivity.kt file

Open MainActivity.kt file and get the reference of TextView defined in the layout file.

// finding the textView
val textView: TextView = findViewById(R.id.text_view_id)

Setting the on click listener to the button

textView.setOnClickListener{
Toast.makeText(this, "COMPUTER SCIENCE PORTAL", Toast.LENGTH_SHORT).show()
}

MainActivity.kt:

package org.geeksforgeeks.demo

import android.os.Bundle
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

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

        // Accessing our TextView from the layout
        val textView: TextView = findViewById(R.id.text_view_id)

        // Set an onClickListener to show a Toast message
        textView.setOnClickListener {
            Toast.makeText(this, "COMPUTER SCIENCE PORTAL", Toast.LENGTH_SHORT).show()
        }
    }
}

Output:

Different attributes of TextView Widgets