setPrimaryNavigationFragment

Set a currently active fragment in this FragmentManager as the primary navigation fragment.

The primary navigation fragment's child FragmentManager will be called first to process delegated navigation actions such as popBackStack if no ID or transaction name is provided to pop to. Navigation operations outside of the fragment system may choose to delegate those actions to the primary navigation fragment as returned by getPrimaryNavigationFragment.

The fragment provided must currently be added to the FragmentManager to be set as a primary navigation fragment, or previously added as part of this transaction.

Parameters