handle onback pressed in fragemnt 2021 kotlin

To handle the onBackPressed event in a Kotlin fragment, you can follow these steps:

1. Override the onBackPressed() method in your fragment class by extending the Fragment class and implementing the OnBackPressedCallback interface.

class MyFragment : Fragment() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        requireActivity().onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
            override fun handleOnBackPressed() {
                // Handle the back press event here
            }
        })
    }

    // Rest of your fragment code
}

1. Inside the handleOnBackPressed() method, you can add the code to handle the back press event. For example, if you want to navigate to a previous fragment or perform some other action, you can do it here.

override fun handleOnBackPressed() {
    // Handle the back press event here
    // For example, navigate to a previous fragment
    requireActivity().supportFragmentManager.popBackStack()
}

1. If you want to disable the default behavior of the back button (e.g., closing the fragment or the activity), you can set the constructor parameter of OnBackPressedCallback to false.

requireActivity().onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(false) {
    // ...
})

By following these steps, you can handle the onBackPressed event in a Kotlin fragment and perform the desired action when the back button is pressed within the fragment.