How to set toolbar title from fragment using Navigation UI Component

Question

I have an activity with a toolbar from a default layout in Android Studio and I can easily change the title in the toolbar through the following method:

    Bundle bundle = new Bundle();
    bundle.putString("toolbarTitle", "A new title");

    NavHostFragment
        .findNavController(this)
        .navigate(R.id.action_navigation_conversation_to_placeholder, bundle);

Where safe args is already implemented for toolbarTitle in the navigation menu layout.

However now I am trying to change the title from the fragment that is opened via the method above, for example;

MyActivity ->opens-> MyFragment
MyFragment changes title

I do know how to update it without using Navigation UI Components, but I want to use them if it is possible.

Other similar questions are only related to the example I already provided above for when a new fragment is being opened or by suggesting the use of the typical method that does not make use of the Navigation UI Components, none cover this specific scenario.

So you're trying to change the toolbar title when you navigate to the new destination? Is this a fixed title that is always the same for that destination or something more dynamic? — ianhanniballake, Aug 17 '20 at 01:15
It's a dynamic title that is to be set from the fragment that is opened, otherwise I would've just set the label directly in the navigation menu layout — Shadow, Aug 17 '20 at 01:16
An example that can clarify the above is a title made out of a list of users currently in a chat (fragment) and those users can leave or join, thus changing the title when that happens. — Shadow, Aug 17 '20 at 01:26

score 4 · Answer 1 · answered Mar 12 '21 at 16:17

You can change the the title by accesing the supportActionBar from the activity:

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    (requireActivity() as AppCompatActivity).supportActionBar?.title = "Your Title"
}

score 0 · Accepted Answer · answered Aug 26 '20 at 17:37

0

It seems like this is not possible with the only way to achieve this by doing it directly without using the Navigation Architecture Components.

answered Aug 26 '20 at 17:37

Shadow

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How to set toolbar title from fragment using Navigation UI Component

2 Answers2