How to change menu item text dynamically in Android

Question

I m trying to change the title of a menu item from outside of the onOptionsItemSelected MenuItem item  method   I already do the following   public boolean onOptionsItemSelected MenuItem item      try       switch item getItemId            case R id bedSwitch          if item getTitle   equals  Set to  In bed                 item setTitle  Set to  Out of bed               inBed   false            else             item setTitle  Set to  In bed               inBed   true                    break            catch Exception e        Log i  Sleep Recorder   e toString           return true      however I d like to be able to modify the title of a particular menu item outside of this method

User · Answer

Declare your menu field   private Menu menu    Following is onCreateOptionsMenu   method  public boolean onCreateOptionsMenu Menu menu    this menu   menu      try           getMenuInflater   inflate R menu menu main menu         catch  Exception e            e printStackTrace            Log i TAG   onCreateOptionsMenu  error    e getMessage               return super onCreateOptionsMenu menu       Following will  be your name setter activity  Either through a button click or through conditional code  public void setMenuName    menu findItem R id menuItemId  setTitle   Set your desired menu title here         This worked for me

User · Answer

You better use the override onPrepareOptionsMenu  menu Clear        if  TabActual    TabSelec Anuncio              menu Add 10  11  0   Crear anuncio           menu Add 10  12  1   Modificar anuncio           menu Add 10  13  2   Eliminar anuncio           menu Add 10  14  3   Actualizar            if  TabActual    TabSelec Fotos              menu Add 20  21  0   Subir foto           menu Add 20  22  1   Actualizar            if  TabActual    TabSelec Comentarios              menu Add 30  31  0   Actualizar           Here an example

User · Answer

you can do this create a global   Menu  object then assign it in onCreateOptionMenu  public class ExampleActivity extends AppCompatActivity     Menu menu    then assign here   Override public boolean onCreateOptionsMenu Menu menu        getMenuInflater   inflate R menu menu  menu       this menu   menu      return true      Then later use assigned Menu object to get required items  menu findItem R id bedSwitch  setTitle  Your Text

User · Answer

I would suggest keeping a reference within the activity to the Menu object you receive in onCreateOptionsMenu and then using that to retrieve the MenuItem that requires the change as and when you need it  For example  you could do something along the lines of the following   public class YourActivity extends Activity      private Menu menu    private String inBedMenuTitle    Set to  In bed      private String outOfBedMenuTitle    Set to  Out of bed      private boolean inBed   false      Override   public boolean onCreateOptionsMenu Menu menu        super onCreateOptionsMenu menu           Create your menu         this menu   menu      return true         private void updateMenuTitles         MenuItem bedMenuItem   menu findItem R id bedSwitch       if  inBed          bedMenuItem setTitle outOfBedMenuTitle         else         bedMenuItem setTitle inBedMenuTitle                  Alternatively  you can override onPrepareOptionsMenu to update the menu items each time the menu is displayed

User · Answer

Create a setOptionsTitle   method and set a field in your class  Such as   String bedStatus    Set to  Out of Bed           public void setOptionsTitle String status        bedStatus   status       Now when the menu gets populated  change the title to whatever your status is    Override     public boolean onCreateOptionsMenu Menu menu            super onCreateOptionsMenu menu            menu add bedStatus                Return true so that the menu gets displayed          return true

User · Answer

As JxDarkAngel suggested  calling this from anywhere in your Activity   invalidateOptionsMenu      and then overriding    Override public boolean onPrepareOptionsMenu Menu menu      MenuItem item   menu findItem R id bedSwitch       if  item getTitle   equals  Set to  In bed               item setTitle  Set to  Out of bed             inBed   false        else           item setTitle  Set to  In bed             inBed   true          return super onPrepareOptionsMenu menu       is a much better choice  I used the answer from https   stackoverflow com a 17496503 568197

User · Answer

I use this code to costum my bottom navigation item  BottomNavigationView navigation   this findViewById R id my bottom navigation   Menu menu   navigation getMenu    menu findItem R id nav wall see  setTitle  Hello

User · Answer

I needed to change the menu icon for the fragment  I altered Charles   s answer to this question a bit for the fragment        private Menu top menu                  Nullable      Override     public View onCreateView LayoutInflater inflater  ViewGroup container  Bundle savedInstanceState            setHasOptionsMenu true                       rootview   inflater inflate R layout first content null               Override     public void onCreateOptionsMenu Menu menu  MenuInflater inflater            inflater inflate R menu fragment menu  menu           this top menu   menu                 my procedure     private void updateIconMenu              if top menu   null                 MenuItem nav undo   top menu findItem R id action undo                nav undo setIcon  R drawable back

User · Answer

For people that need the title set statically  This can be done in the AndroidManifest xml   lt activity     android name   ActivityName      android label  Title Text   gt   lt  activity gt

User · Answer

You can do it like this  and no need to dedicate variable  Toolbar toolbar   findViewById R id toolbar   Menu menu   toolbar getMenu    MenuItem menuItem   menu findItem R id some action   menuItem setTitle  quot New title quot     Or a little simplified  MenuItem menuItem     Toolbar findViewById R id toolbar   getMenu   findItem R id some action   menuItem setTitle  quot New title quot     It works only - after the menu created

User · Answer

It seems to me that you want to change the contents of menu inside a local method  and this method is called at any time  whenever an event is occurred  or in the activity UI thread   Why don t you take the instance of Menu in the global variable in onPrepareOptionsMenu when this is overridden and use in this method of yours  Be sure that this method is called  whenever an event is occurred  like button click   or in the activity UI thread  handler or async-task post-execute   You should know in advance the index of this menu item you want to change  After clearing the menu  you need to inflate the menu XML and update your item s name or icon

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