I am using the Android navigation component to show a DialogFragment. This also works fine, but now I want to have rounded corners on the dialog.
I've seen here that I could use the MaterialAlertDialogBuilder of the Material Design Components (which my app uses anyways), but as the navigation component displays the DialogFragment for me, I have no access to the DialogBuilder that the navigation component uses? Or is there any way to access it?
Navigation doesn't control what type of dialog is being created - that is the responsibility of the DialogFragment and specifically its onCreateDialog() method.
It is in onCreateDialog() that you'd use MaterialAlertDialogBuilder to create your dialog with rounded corners.