Kotlin double tab exit button

private var doubleBackToExitPressedOnce = false
override fun onBackPressed() {
        if (doubleBackToExitPressedOnce) {
            super.onBackPressed()
            return
        }

        this.doubleBackToExitPressedOnce = true
        Toast.makeText(this, "Please click BACK again to exit", Toast.LENGTH_SHORT).show()

        Handler().postDelayed(Runnable { doubleBackToExitPressedOnce = false }, 2000)
    }

Source: stackoverflow.com

Similar codes

2 votes119 views1 answer
Arraylist vs mutablelist kotlin
Kotlin
2 votes105 views2 answers
How to throw exception in kotlin
Kotlin
4 votes124 views2 answers
Kotlin convert string to arraylist
Kotlin
2 votes111 views1 answer
Run breaker kotlin
Kotlin
2 votes122 views1 answer
Android garbage collection
Kotlin
0 vote105 views1 answer
Convert boolean to int kotlin
Kotlin
0 vote113 views1 answer
Kotlin codeforces template
Kotlin
4 votes122 views2 answers
Kotlin create empty list
Kotlin
0 vote109 views1 answer
Kotlin optional test
Kotlin
0 vote111 views2 answers
Kotlin read file
Kotlin