Programming Tutorials

Android Kotlin - How to implement CheckBox checked change listener This code demonstrates how to implement a listener for a checkbox's checked state change in an Android application written in Kotlin. The code consists of two parts: the MainActivity.kt file which handles the logic and the activity_main.xml file which defines the user interface elements. Breakdown of the Code: 1. MainActivity.kt: This file defines the MainActivity class which extends AppCompatActivity . The onCreate method is responsible for initializing the activity. Inside onCreate : The layout for the activity is inflated using setContentView(R.layout.activity_main) . An anonymous listener is assigned to the checkBox using setOnCheckedChangeListener . This listener is triggered whenever the checkbox's checked state changes. The listener takes two arguments: buttonView (which is the checkbox itself) and isChecked (a boolean indicating the current checked state). Inside the listener: If the chec...