Setting Custom ActionBar Title from Fragment

Question

In my Main FragmentActivity  I setup my custom ActionBar title like this       LayoutInflater inflator    LayoutInflater  this              getSystemService Context LAYOUT INFLATER SERVICE       View v   inflator inflate R layout custom titlebar  null        TextView tv    TextView  v findViewById R id title       Typeface tf   Typeface createFromAsset this getAssets                 fonts capsuula ttf        tv setTypeface tf       tv setText this getTitle          actionBar setCustomView v     This works perfect   However  once I open other Fragments  I want the title to change   I am not sure how to access the Main Activity to do this   In the past  I did this     MainFragmentActivity  getActivity    getSupportActionBar   setTitle              catTitle     Can someone advise on the proper method   XML    lt  xml version  1 0  encoding  utf-8   gt   lt RelativeLayout xmlns android  http   schemas android com apk res android      android layout width  match parent      android layout height  match parent      android background   android color transparent   gt        lt TextView         android id    id title          android layout width  wrap content          android layout height  wrap content          android layout centerVertical  true          android layout marginLeft  5dp          android ellipsize  end          android maxLines  1          android text            android textColor   fff          android textSize  25sp    gt    lt  RelativeLayout gt

User · Answer

Best event for change title onCreateOptionsMenu   Override public View onCreateView LayoutInflater inflater  ViewGroup container                           Bundle savedInstanceState        View view   inflater inflate R layout general  container        setHasOptionsMenu true       lt -Add this line     return view      Override public void onCreateOptionsMenu Menu menu  MenuInflater inflater            If use specific menu     menu clear        inflater inflate R menu path list menu  menu          If use specific menu        AppCompatActivity  getActivity    getSupportActionBar   setTitle  Your Fragment        super onCreateOptionsMenu menu  inflater

User · Answer

Google examples tend to use this within the fragments   private ActionBar getActionBar         return   ActionBarActivity  getActivity    getSupportActionBar        The fragment will belong to an ActionBarActivity and that is where the reference to the actionbar is  This is cleaner because the fragment doesn t need to know exactly what activity it is  it only needs to belong to an activity that implements ActionBarActivity  This makes the fragment more flexible and can be added to multiple activities like they are meant to    Now  all you need to do in the fragment is   getActionBar   setTitle  Your Title      This works well if you have a base fragment that your fragments inherit from instead of the normal fragment class   public abstract class BaseFragment extends Fragment       public ActionBar getActionBar             return   ActionBarActivity  getActivity    getSupportActionBar              Then in your fragment   public class YourFragment extends BaseFragment        Override     public void onActivityCreated Bundle savedInstanceState            super onActivityCreated savedInstanceState           getActionBar   setTitle  Your Title

User · Answer

If you have a main activity with many fragments you put in  usually using the navigationDrawer  And you have an array of titles for yours fragments  when you press back  for them to change  put this in the main actity that hold the fragments   Override      public void onBackPressed          int T getSupportFragmentManager   getBackStackEntryCount        if T  1    finish          if T gt 1            int tr   Integer parseInt getSupportFragmentManager   getBackStackEntryAt T-2  getName             setTitle navMenuTitles tr     super onBackPressed                 This assumes that for each fragment you give it a tag  usually somewhere when you add the fragments to the list of navigationDrawer  according to the position pressed on the list  So that position is what i capture on the tag       fragmentManager beginTransaction    replace R id frame container  fragment  addToBackStack position  commit      Now  the navMenuTitles is something you load on the onCreate      load slide menu items         navMenuTitles   getResources   getStringArray R array nav drawer items     The array xml is an array type string resource on strings xml    lt  -- Nav Drawer Menu Items -- gt       lt string-array name  nav drawer items  gt           lt item gt Title one lt  item gt           lt item gt Title Two lt  item gt       lt  string-array gt

User · Answer

Just in case if you are having issues with the code  try putting  getSupportActionBar   setTitle title  inside onResume   of your fragment instead of onCreateView      i e  In MainActivity java    public void setActionBarTitle String title        getSupportActionBar   setTitle title       In Fragment     Override  public void onResume         super onResume           MainActivity  getActivity    setActionBarTitle  Your Title

User · Answer

The downside to your approach of casting like so      MainFragmentActivity  getActivity    getSupportActionBar   setTitle          catTitle     is that your fragment is no longer reusable outside of MainActivityFragment  If you don t plan to use it outside of that activity  then there s no problem  A better approach would be conditionally set the title depending on the activity  So inside your fragment  you would write     if  getActivity   instanceof ActionBarActivity          ActionBarActivity  getActivity    getSupportActionBar   setTitle  Some Title

User · Answer

Update October  30  2019     Since we have new components such as ViewModel and LiveData  we can have a different easier way to update Activity Title from Fragment by using ViewModel and Live Data  Activity  class MainActivity   AppCompatActivity     private lateinit var viewModel  MainViewModel override fun onCreate savedInstanceState  Bundle         super onCreate savedInstanceState      setContentView R layout main activity      if  savedInstanceState    null            supportFragmentManager beginTransaction                replace R id container  MainFragment newInstance                 commitNow             viewModel   ViewModelProviders of this  get MainViewModel  class java      viewModel title observe this  Observer           supportActionBar  title   it              MainFragment  class MainFragment   Fragment     companion object       fun newInstance     MainFragment     private lateinit var viewModel  MainViewModel override fun onCreateView inflater  LayoutInflater  container  ViewGroup                             savedInstanceState  Bundle    View       return inflater inflate R layout main fragment  container  false    override fun onActivityCreated savedInstanceState  Bundle         super onActivityCreated savedInstanceState      activity  run           viewModel   ViewModelProviders of this  get MainViewModel  class java           throw Throwable  invalid activity       viewModel updateActionBarTitle  Custom Title From Fragment         And MainModelView   class MainViewModel   ViewModel     private val  title   MutableLiveData lt String gt    val title  LiveData lt String gt  get      title fun updateActionBarTitle title  String     title postValue title      And then you can update the Activity title from Fragment using viewModel updateActionBarTitle  Custom Title From Fragment       Update April  10  2015     You should use listener to update your action bar title  Fragment   public class UpdateActionBarTitleFragment extends Fragment       private OnFragmentInteractionListener mListener       public UpdateActionBarTitleFragment                 Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           if  getArguments      null                          Override     public View onCreateView LayoutInflater inflater  ViewGroup container                               Bundle savedInstanceState            if  mListener    null                mListener onFragmentInteraction  Custom Title                      return inflater inflate R layout fragment update action bar title2  container  false               Override     public void onAttach Activity activity            super onAttach activity           try               mListener    OnFragmentInteractionListener  activity            catch  ClassCastException e                throw new ClassCastException activity toString                           must implement OnFragmentInteractionListener                          Override     public void onDetach             super onDetach            mListener   null             public interface OnFragmentInteractionListener           public void onFragmentInteraction String title             And Activity   public class UpdateActionBarTitleActivity extends ActionBarActivity implements UpdateActionBarTitleFragment OnFragmentInteractionListener         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity update action bar title               Override     public void onFragmentInteraction String title            getSupportActionBar   setTitle title             Read more here  https   developer android com training basics fragments communicating html

User · Answer

At least for me  there was an easy answer  after much digging around  to changing a tab title at runtime   TabLayout tabLayout    TabLayout  findViewById R id tabs   tabLayout getTabAt MyTabPos  setText  My New Text

User · Answer

In the Fragment we can use like this  It s working fine for me    getActivity   getActionBar   setTitle  YOUR TITLE

User · Answer

Just to add onto the selected answer  you may also want to add a second method to your main activity  So you would end up with the following methods in your main activity   public void setActionBarTitle String title        getSupportActionBar   setTitle title      public void setActionBarTitle int resourceId        setActionBarTitle getResources   getString resourceId       This will allow you set the title from both a String variable as well as a resource ID such as R id this is a string from your strings xml file  This will also work a little more like how getSupportActionBar   setTitle   works since it allows you to pass in a resource ID

User · Answer

A simple Kotlin example  Assuming these gradle deps match or are higher version in your project   kotlin version    1 3 41  nav version ktx    2 0 0    Adapt this to your fragment classes                  A simple  Fragment  subclass                Updates the action bar title when onResume   is called on the fragment         which is called every time you navigate to the fragment                     class MyFragment   Fragment         private lateinit var mainActivity  MainActivity      override fun onCreateView          inflater  LayoutInflater  container  ViewGroup           savedInstanceState  Bundle         View                             mainActivity   this activity as MainActivity                            override fun onResume             super onResume           mainActivity supportActionBar  title    My Fragment

User · Answer

if you are using android studio 1 4 stable template provided by google than simple you had to write following code in onNavigationItemSelected methode in which your related fragment calling if condition    setTitle  YOUR FRAGMENT TITLE

User · Answer

Solution based on Ashish answer with Java private void setUI        mainToolbar   findViewById R id mainToolbar       setSupportActionBar mainToolbar       DrawerLayout drawer   findViewById R id drawer layout       NavigationView navigationView   findViewById R id nav view       mAppBarConfiguration   new AppBarConfiguration Builder              R id nav home  R id nav messaging  R id nav me               setDrawerLayout drawer               build         navController   Navigation findNavController this  R id nav host fragment       navController addOnDestinationChangedListener navDestinationChange       NavigationUI setupActionBarWithNavController this  navController  mAppBarConfiguration       NavigationUI setupWithNavController navigationView  navController      private NavController OnDestinationChangedListener navDestinationChange   new NavController OnDestinationChangedListener         Override     public void onDestinationChanged  NonNull NavController controller   NonNull NavDestination destination   Nullable Bundle arguments            if R id nav home  destination getId                 destination setLabel  quot News quot

User · Answer

What you re doing is correct  Fragments don t have access to the ActionBar APIs  so you have to call getActivity  Unless your Fragment is a static inner class  in which case you should create a WeakReference to the parent and call Activity getActionBar from there   To set the title for your ActionBar  while using a custom layout  in your Fragment you ll need to call getActivity   setTitle YOUR TITLE    The reason you call setTitle is because you re calling getTitle as the title of your ActionBar  getTitle returns the title for that Activity   If you don t want to get call getTitle  then you ll need to create a public method that sets the text of your TextView in the Activity that hosts the Fragment    In your Activity   public void setActionBarTitle String title       YOUR CUSTOM ACTION BAR TITLE setText title       In your Fragment     MainFragmentActivity  getActivity    setActionBarTitle YOUR TITLE     Docs   Activity getTitle  Activity setTitle  Also  you don t need to call this whatever in the code you provided  just a tip

User · Answer

Use the following   getActivity   setTitle  YOUR TITLE

User · Answer

If you re using ViewPager  like my case  you can use   getSupportActionBar   setTitle YOURE TAB BAR getTabAt position  getText       in onPageSelected method of your VIEW PAGER addOnPageChangeListener

User · Answer

Here is my solution for setting the ActionBar title from fragments  when using NavigationDrawer   This solution uses an Interface so the fragments does not need to reference the parent Activity directly   1  Create an Interface   public interface ActionBarTitleSetter       public void setTitle String title        2  In the Fragment s onAttach  cast the activity to the Interface type and call the SetActivityTitle method    Override  public void onAttach Activity activity         super onAttach activity         ActionBarTitleSetter  activity  setTitle getString R string title bubbles map         3  In the activity  implement the ActionBarTitleSetter interface    Override  public void setTitle String title         mTitle   title

User · Answer

Setting Activity   s title from a Fragment messes up responsibility levels  Fragment is contained within an Activity  so this is the Activity  which should set its own title according to the type of the Fragment for example   Suppose you have an interface   interface TopLevelFragment       String getTitle        The Fragments which can influence the Activity   s title then implement this interface  While in the hosting activity you write    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        FragmentManager fm   getFragmentManager        fm beginTransaction   add 0  new LoginFragment     login   commit        Override public void onAttachFragment Fragment fragment        super onAttachFragment fragment        if  fragment instanceof TopLevelFragment          setTitle   TopLevelFragment  fragment  getTitle         In this manner Activity is always in control what title to use  even if several TopLevelFragments are combined  which is quite possible on a tablet

User · Answer

In your MainActivity  under onCreate   getSupportActionBar   setDisplayHomeAsUpEnabled true     And in your fragment activity under onResume   getActivity   setTitle R string app name science     Optional - if they show warning of null reference  Objects requireNonNull getSupportActionBar    setDisplayHomeAsUpEnabled true     Objects requireNonNull getActivity    setTitle R string app name science

User · Answer

I don t think that the accepted answer is a perfect answer for it  Since all the activities that use      Toolbar   are extended using      AppCompatActivity     the fragments called from it can use the below mentioned code for changing the title     AppCompatActivity  context  getSupportActionBar   setTitle  Your Title

User · Answer

I am getting a very simple solution to set ActionBar Title in either   fragment or any activity without any headache       Just modify the xml where is defined Toolbar as below      lt android support design widget AppBarLayout         android layout width  match parent          android layout height  wrap content          android theme   style AppTheme AppBarOverlay  gt            lt android support v7 widget Toolbar             android id    id toolbar              android layout width  match parent              android layout height   attr actionBarSize              android background   color colorPrimaryDark              app popupTheme   style AppTheme PopupOverlay   gt                lt TextView                 style   style TextAppearance AppCompat Widget ActionBar Title                  android id    id toolbar title                  android layout width  match parent                  android layout height  wrap content                  android text   string app name                    gt               lt  android support v7 widget Toolbar gt        lt  android support design widget AppBarLayout gt        1  If you want to set the actionbar in a fragment then     Toolbar toolbar   findViewById R id toolbar   TextView toolbarTitle    TextView  toolbar findViewById R id toolbar title        For using it from anywhere  you can define a method in the activity   public void setActionBarTitle String title            toolbarTitle setText title              To call this method in activity  simply call it    setActionBarTitle  Your Title        To call this method from fragment of the activity  simply call it      MyActivity getActivity    setActionBarTitle  Your Title

User · Answer

Save ur Answer in String   object and set it OnTabChange   in MainActivity as Belowwww  String   object     Fragment1   Fragment2   Fragment3     public void OnTabChange String tabId    int pos  mTabHost getCurrentTab          To get tab position  actionbar setTitle object get pos          Setting in View Pager public void onPageSelected int arg0        mTabHost setCurrentTab arg0   actionbar setTitle object get pos

User · Answer

There are many ways as as outlined above  You can also do this in onNavigationDrawerSelected  in your DrawerActivity  public void setTitle final String title         TextView findViewById R id toolbar title   setText title       Override public void onNavigationDrawerItemSelected int position           update the main content by replacing fragments     fragment   null      String title   null      switch position        case 0          fragment   new HomeFragment            title    Home           break      case 1          fragment   new ProfileFragment            title     Find Work            break                    if  fragment    null            FragmentManager fragmentManager   getFragmentManager            fragmentManager          beginTransaction            replace R id container                  fragment  commit               The key is this line         if  title    null  amp  amp  findViewById R id toolbar title    null   setTitle title

[java] Setting Custom ActionBar Title from Fragment

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