Home » Android » android – How to get Toolbar from fragment?

android – How to get Toolbar from fragment?

Posted by: admin March 11, 2020 Leave a comment

Questions:

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.

How to&Answers:

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"

Answer:

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;
            }
        });

Answer:

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;

Answer:

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

Answer:

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

Answer:

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

Answer:

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();

Answer:

You can create a method for this on your Activity class:

public void setToolbarTitle(String title) {
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle(title);
}

And you can use like this:

setToolbarTitle("Hello World");

Answer:

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");

  1. 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;
    }
    

Answer:

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)
        }
    }

Answer:

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.