Saving changes on Back key on Android 5 how to deal with cases that need confirmation?

1. How do you handle the back button in Kotlin?
2. How to implement back button in Android Studio?

How do you handle the back button in Kotlin?

Create action bar variable and call function getSupportActionBar() in the java/kotlin file. Show back button using actionBar. setDisplayHomeAsUpEnabled(true) this will enable the back button.

How to implement back button in Android Studio?

There are two simple steps to create a back button in the title bar: First, make the application icon clickable using the following code in the activity whose title bar you want to have a back button in: ActionBar actionBar = getActionBar(); actionBar. setDisplayHomeAsUpEnabled(true);