How to add item item to menu in android?

Question

Android

I am new to this I have 2 questions:
1. I have a standard code

<item android:id="@+id/nav_favorites"
        android:title="@string/favorites">
        <menu android:id="@+id/nav_favorites_main">
            <item
                android:id="@+id/nav_share"
                android:title="Share" />
        </menu>
    </item>

I need to add one more item item there () through Java itself.
2. As I understand it, almost any element added to xml is added via fragment and event processing takes place in the corresponding fragment of the Java code (if I misunderstood, correct me). Is it possible to use the same fragment by changing the text and id, to work out different button clicks??

Answer 1

one.

Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    menu.add(Menu.NONE, nav_share, Menu.NONE, "Share");
    super.onCreateOptionsMenu(menu, inflater);
}

Parameters to be passed to the add(int groupId, int itemId, int order, CharSequence title) method
2. ID cannot be changed dynamically, you can delete the menu item and add a new one with a new title and ID. And just the text can be updated programmatically

public class MyFragment extends Fragment {
  private Menu menu;
  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
     this.menu = menu;
     super.onCreateOptionsMenu(menu, inflater);
  }

  private void updateTitle () {
     MenuItem shareItem = menu.findItem(R.id.share);
     shareItem.setTitle("Поделиться");
  }
}

You can also try onPrepareOptionsMenu() which is called every time the menu is opened.