Toast - Android Studio - Kotlin

In this example, we will display a toast message by clicking on a Button. See the following example:

Step.1
MainActivity.kt
Add the following code in the MainActivity.kt class.
package com.study.kotlinkatta

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

class MainActivity : AppCompatActivity() {

    lateinit var btn_clcik_to_toast: Button

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

        btn_clcik_to_toast =findViewById(R.id.btn_clcik_to_toast)

        btn_clcik_to_toast.setOnClickListener {
            Toast.makeText(applicationContext,"This is a Toast.",Toast.LENGTH_SHORT).show()
        }

    }
}

Step.2

activity_main.xml

Add the following code in the activity_main.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">

    <Button
        android:id="@+id/btn_clcik_to_toast"
        android:background="@color/colorAccent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="20dp"
        android:text="Click To Toast"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Output: