Set up toolbar as actionbar in fragment

Question

I want to set up my toolbar as an actionbar, but since your toolbar is a layoutelement it has to be in your layout. Now my layout is in my fragment.

I added the toolbar in my layout and I call it within my fragment:

//Toolbar
Toolbar toolbar = (Toolbar) getActivity().findViewById(R.id.toolbar);

It works because I can set the title and so on but now I want it to react as a actionbar because I want to have this actually. setDisplayHomeAsUpEnabled(true)

To do that I have to change the toolbar to an actionbar:

setSupportActionBar(toolbar);

That doesn't work in my fragment ...

Can anybody help me to get my toolbar to work as an actionbar in a fragment.

score 68 · Accepted Answer · answered Sep 30 '15 at 04:52

68

Now ActionBarActivity is deprecated so You need to cast your activity from getActivity() to AppCompatActivity first. Here's an example:

((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle();

The reason you have to cast it is because getActivity() returns a FragmentActivity and you need an AppCompatActivity

answered Sep 30 '15 at 04:52

Pratik Butani

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For some reason this is not initializing the toolbar in fragment – Akira Lynn Aug 14 '18 at 14:00

score 32 · Answer 2 · answered Jan 27 '16 at 07:36

32

try:

 ((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);

answered Jan 27 '16 at 07:36

notdrone

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what about one activity app ? – Acauã Pitta Apr 18 '20 at 23:50

score 18 · Answer 3 · edited Jan 17 '16 at 03:10

18

ActionBar is an Activity property. If you want to set a toolbar from a given fragment as the ActionBar of the owning Activity, then get the Activity that owns the fragment (Fragment.getActivity()) and set its ActionBar property.

Then juse use the same setDisplayHomeAsUpEnabled method you mentioned to begin with on the ActionBar after setting your toolbar as the ActionBar to get the back / up button.

You will obviously have to manage this carefully if your app has multiple fragments within that Activity.

edited Jan 17 '16 at 03:10

Jorgesys

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answered Nov 20 '14 at 01:34

dominicoder

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I just want to use up navigation so I think that's why I need an actionbar made of my toolbar. How do I set that ActionBar property can you give me and example please? – Laurenswuyts Nov 20 '14 at 01:39
Why not just put your toolbar in your main activity and that way youll be able to use the setSupportActionBar method – Developer Paul Nov 20 '14 at 01:53
Because I use fragments and I set my layout in my fragments and not in my activities. So my activity cant detect the toolbar in my fragment because the fragment is loaded after the activity looks for the toolbar – Laurenswuyts Nov 20 '14 at 02:05
Just use the same setDisplayHomeAsUpEnabled method you mentioned to begin with on the ActionBar after setting your toolbar as the ActionBar (just tried it, works fine). Updated answer as well. – dominicoder Nov 20 '14 at 02:53

score 7 · Answer 4 · edited Jun 07 '15 at 08:28

7

Use

((ActionBarActivity) getActivity()).getSupportActionBar().setSubtitle("Your Title");

edited Jun 07 '15 at 08:28

bummi

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answered Jun 07 '15 at 08:15

Ravi

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This is returning a NullPointerException. – Machado Sep 24 '15 at 20:40
8

you need to set before you get. (that rhymes) – notdrone Jul 11 '16 at 07:47

score 2 · Answer 5 · answered Jul 31 '18 at 19:25

If you use Kotlin, try this:

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, state: Bundle?): View? { 
        (activity as AppCompatActivity).setSupportActionBar(your_toolbar)
        setHasOptionsMenu(true)

        return inflater.inflate(R.layout.your_layout, container, false)
}


override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
        inflater?.inflate(R.menu.your_menu, menu)
}

score 0 · Answer 6 · edited Aug 23 '18 at 01:15

0

Lets say the Activity holding the fragment is MainActivity.

Do

MainActivity main = (MainActivity)getActivity();
//You can access all public variable and methods of MainActivity.
//simply call 
main.setSupportActionBar(toolbar)
main.getSupportActionBar.setTitle("title");

edited Aug 23 '18 at 01:15

Amit Phaltankar

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answered Aug 22 '18 at 22:45

Micheal Mavericks

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java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead. – Acauã Pitta Apr 18 '20 at 23:52

Set up toolbar as actionbar in fragment

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