Dynamic ActionBar title from a Fragment using AndroidX Navigation

Question

I am using the new Navigation component from Android Jetpack.

The root Activity setup is quite simple:

override fun onCreate(savedInstanceState: Bund         


        

Answer 1

Until the issue will be fixed, simple listener is working to me:

/**
 * Temporary solution to dynamically change title of actionbar controlled by Navigation component
 * Should be removed as soon as the bug on Navigation will be fixed: (https://issuetracker.google.com/issues/80267266)
 */
interface TempToolbarTitleListener {
    fun updateTitle(title: String)
}

class MainActivity : AppCompatActivity(), TempToolbarTitleListener {

    ...

    override fun updateTitle(title: String) {
        binding.toolbar.title = title
    }
}

change title from fragment:

(activity as TempToolbarTitleListener).updateTitle("custom title")