Question 126787 in Android Studio Question posted in
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Android Studio – How can I add click event to onBackPressed in Fragment?

I want to add on-click listener to onBackPressed() button. How can I do that?

fun onBackPressed(it: View) {

        val title = binding.edittexttitle.text
        val notes = binding.edittextnote.text

        val d = Date()
        val s: CharSequence = DateFormat.format("MMMM d, yyyy ", d.time)

        Log.e("@@@@@", "createNotes: $s")

    }
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2

Answers


  1. 0

    You can override handleOnBackPressed.

    override fun handleOnBackPressed() {
            binding.yourbutton.setOnClickListener {
            //TODO
        }
}
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  2. 0

    To override onBackPressed in fragment call onBackPressedDispatcher of the activity and add a callback to it. In callback put whatever code you want to be get executed on the back button press.

    requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner) {
    
    val title = binding.edittexttitle.text
    val notes = binding.edittextnote.text

    val d = Date()
    val s: CharSequence = DateFormat.format("MMMM d, yyyy ", d.time)

    Log.e("@@@@@", "createNotes: $s")
}

    Afterwards if you want the back button to work as it normally does, just disable callback using isEnabled = false and then call requireActivity().onBackPressed(), inside callback lambda.

    requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner) {
    // Your code
    isEnabled = false
    requireActivity().onBackPressed()
}
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