How to get Toolbar from fragment?

Question

I have ActionBarActivity with NavigationDrawer and use support_v7 Toolbar as ActionBar. In one of my fragments toolbar has custom view. In other fragments Toolbar should show title.

How get Toolbar instance for customizing from fragments? I can get ActionBar with getActivity().getActionBar(), but if I call setTitle() for this instance ActionBar it do nothing.

UPD:

In my case

((ActionBarActivity) getActivity()).getSupportActionBar().setTitle();

(as MrEngineer13 said) don't work at first fragment creation because I call it from onHiddenChanged(). Now I add more one to onCreateView() and it works fine.

Clownery

fragments do not have actionbars/toolbars activities do – Arissa

(MainAcivity)this.getActivity()).getToolbar(); will be the right answer!! for getting the Toolbar in fragment!! – Collectivism

Answer 1

You need to cast your activity from getActivity() to AppCompatActivity first. Here's an example:

((AppCompatActivity) getActivity()).getSupportActionBar().setTitle();

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

In Kotlin:

(activity as AppCompatActivity).supportActionBar?.title = "My Title"

Casuistry

getting 'supportActionBar' and 'toolbar' is same thing? – Ku

@Ku not sure – Silhouette

If i add this, its changing the title.. But if i go back to the parent activity, how to change the title again ? I mean i have a nav drawer. Side drawer has some fragments and main activity has its own title. When i set title of main activity, it works and in fragment, the way you mentioned worked perfect. But how should i change the title of the activity on going back? – Sverige

Answer 2

In case fragments should have custom view of ToolBar you can implement ToolBar for each fragment separately.

add ToolBar into fragment_layout:

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimaryDark"/>

find it in fragment:

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment, container, false);
        Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);

        //set toolbar appearance
        toolbar.setBackground(R.color.material_blue_grey_800);

        //for crate home button
        AppCompatActivity activity = (AppCompatActivity) getActivity();
        activity.setSupportActionBar(toolbar);
        activity.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

menu listener could be created two ways: override onOptionsItemSelected in your fragment:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()){
        case android.R.id.home:
            getActivity().onBackPressed();
    }
    return super.onOptionsItemSelected(item);
}

or set listener for toolbar when create it in onCreateView():

toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem menuItem) {
                return false;
            }
        });

Gamber

I just want confirm this the right way to do? if we load different fragment with toolbar in viewpager+ Tablayout or Pagertabstripe it will effect the app performance while swiping? – Collectivism

@Collectivism I have a drawer design with each fragment implementing the toolbar (and thus having a toolbar in it's layout file) and the above code worked great for me. – Dessalines

Thanks! Worked like HEYUL!! :) Btw, better to override parent Activity's onOptionsItemSelected() instead of Fragment's, to avoid code repetition. – Hadley

@ChadMx no, why he even wrote about adding toolbar in xml and so on. Author asked how to get toolbar programmatically from fragment . So https://mcmap.net/q/181785/-how-to-get-toolbar-from-fragment this is the best/right answer and it's short – Samuele

Answer 3

You have two choices to get Toolbar in fragment

First one

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

and second one

Toolbar toolbar = ((MainActivity) getActivity()).mToolbar;

Persimmon

But is this the right way .. bcoz we have getSupportedActionBar also ? – Inclusion

If you are using a one-activity-to-many-fragments model, the first example simply gets you a reference to the main toolbar so you can manipulate it from your fragment. It is also, I believe, the best option. – Tekla

Answer 4

toolbar = (Toolbar) getView().findViewById(R.id.toolbar);
AppCompatActivity activity = (AppCompatActivity) getActivity();
activity.setSupportActionBar(toolbar);

Culverin

Answer 5

From your Fragment: ( get Toolbar from fragment?)

// get toolbar
((MainAcivity)this.getActivity()).getToolbar();  // getToolbar will be method in Activity that returns Toolbar!!  don't use getSupportActionBar for getting toolbar!!
// get action bar
this.getActivity().getSupportActionBar();

this is very helpful when you are using spinner in Toolbar and call the spinner or custom views in Toolbar from a fragment!

From your Activity:

// get toolbar
this.getToolbar();
// get Action Bar
this.getSupportActionBar();

Collectivism

You have to have a method in your activity called getToolbar(), which is bad, because that is not how communication between activity and fragment should be done. – Estate

yes there is no other way for this!! many of the navigation drawer libs implement this style only !!! some times we need cast the activity because of AppCompatActivity (AppCompatActivity) getActivity() that is another pain point !!! all this stuffs totally kills the dev time :( – Collectivism

Answer 6

For Kotlin users (activity as AppCompatActivity).supportActionBar?.show()

Obstructionist

!! is completly avoidable with ? and it will save you a possible crash – Leanto

I believe this is better (activity as? AppCompatActivity)?.supportActionBar?.show() – Leanto

Answer 7

Maybe you have to try getActivity().getSupportActionBar().setTitle() if you are using support_v7.

Roberto

Answer 8

I did it by using these steps.

1. Set Title using below code in onCreateView of the main fragment.

((AppCompatActivity) getActivity()).getSupportActionBar().setTitle("Your title");

2. For swapping between fragments i'm using bottom navigation bar which is implemented on MainActivity (Parent Activity) of the fragment. Even if you are using any button or menu item then you can change the title from onSelectedItemClickListener, just like i did in my case.

   public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
       switch (menuItem.getItemId()){
           case R.id.menu_dashboard:
               getSupportActionBar().setTitle("Dashboard");
               fm.beginTransaction().hide(active).show(dashboardFragment).commit();
               active = dashboardFragment;
               return true;
           case R.id.menu_workshop:
               getSupportActionBar().setTitle("Workshops");
               fm.beginTransaction().hide(active).show(workshopFragment).commit();
               active = workshopFragment;
               return true;
        }
        return false;
   }
   

Remanence

Answer 9

In XML

 <androidx.appcompat.widget.Toolbar
  android:id="@+id/main_toolbar"
  android:layout_width="match_parent"
  android:layout_height="?attr/actionBarSize"
  app:layout_scrollFlags="scroll|enterAlways">
 </androidx.appcompat.widget.Toolbar>

Kotlin: In fragment.kt -> onCreateView()

setHasOptionsMenu(true)

val toolbar = view.findViewById<Toolbar>(R.id.main_toolbar)

(activity as? AppCompatActivity)?.setSupportActionBar(toolbar)

(activity as? AppCompatActivity)?.supportActionBar?.show()

-> onCreateOptionsMenu()

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

->onOptionsItemSelected()

   override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return when (item.itemId) {
             R.id.selected_id->{//to_do}
             else -> super.onOptionsItemSelected(item)
        }
    }

Izak

Answer 10

if you are using custom toolbar or ActionBar and you want to get reference of your toolbar/action bar from Fragments then you need to first get instance of your Main Activity from Fragment's onCreateView Method like below.

MainActivity activity = (MainActivity) getActivity();

then use activity for further implementation like below

ImageView vRightBtn = activity.toolbar.findViewById(R.id.toolbar_right_btn);

Before calling this, you need to initialize your custom toolbar in your MainActivity as below.

First set define your toolbar public like

public Toolbar toolbar;
public ActionBar actionBar;

and in onCreate() Method assign the custom toolbar id

toolbar = findViewById(R.id.custom_toolbar);
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();

That's It. It will work in Fragment.

Perfectible