Handling back button in Android Navigation Component

Question

I\'d like to know how properly handle system back button action using Navigation Controller. In my app I have two fragments (for ex. fragment1 and fragment2) and I have an a

Answer 1

In 2.1.0-alpha06

If you want to handle backpress only in current fragment

requireActivity().onBackPressedDispatcher.addCallback(this@LoginFragment) {
    // handle back event
}

For whole Activity

requireActivity().onBackPressedDispatcher.addCallback() {
    // handle back event
}