onCreateOptionsMenu is never called

问题:

I am having some trouble getting an options menu working in Android. I build apps before, and they all worked fine, but now the menu just doesn't pop up.

The code:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);

    getMenuInflater().inflate(R.menu.activity_video, menu);
    return true;
}

the whole method is never even called (checked by setting a breakpoint). The activity is super-simple, it just has a VideoView in it, with an OnTouchListener set.

I am using Android 4.0.4 on a Samsung Galaxy 10.1, API level 15, minSDK 15. Am I missing something?

回答1:

If the phone you test on has a menu button onCreateOptionsMenu wont't be called on start with the theme:

android:theme="@android:style/Theme.Black.NoTitleBar"

But when you click the menu button the onCreateOptionsMenu will be called. I don't know what happens on phones without hardware buttons...

回答2:

In the latest versions of Android when using the compat library for toolbar, is very common that this happens, in order to get the menu items to display in the toolbar you must do the following:

mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);

回答3:

Call setHasOptionsMenu function from onCreate first. The onCreateOptionsMenu will be automatically called.

回答4:

In the method: Fragment#onCreateView(...) you should put:

setHasOptionsMenu(true);

Then your method will be called.

回答5:

I was having the same problem (menu not showing up, onCreateOptionsMenu not being called).

If you are calling this within a fragment, you need to override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) not public boolean onCreateOptionsMenu(Menu menu). Fragments do not use the latter, so they will never even call it.

Activity menu

Fragment menu

回答6:

I had the same issue. My problem was solved by inheritance of a different activity class.

So I had been doing:

public class WelcomeActivity extends Activity

but changed this to:

public class WelcomeActivity extends AppCompatActivity

This way I was saying that say an action bar can be added to your activity.

回答7:

Maybe you also have overrode onKeyDown method and made it always return true. Returning true means that keyEvent will be prevented from being propagated further. See code below:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
        /*
          handling event
         */
        return true; //onCreateOptionsMenu won't be invoked.
}

回答8:

I had a similar issue, but a different solution I am sharing with the community (as it took me one hour to understand what was happening):

    abstract class BaseActivity : AppCompatActivity{
      override fun onCreate(savedInstanceState: Bundle?) {
      setSupportActionBar(my_toolbar)
      }
    }
    class MyActivity : BaseActivity{
        // TODO : some good stuff
    }

where my_toolbar is an object created in my xml file through dataBinding.

The issue looks the same, no toolbar appear, no call to onCreateOptionsMenu.

My solution was to promote this code to the child class and not to that basic, as my_toolbar is only initialized as the child class is built.

回答9:

Try This It works for me:---

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    super.onCreateOptionsMenu(menu);
    getMenuInflater().inflate(R.menu.home_page_menu, menu);
    return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
    case R.id.menu_delete:
        Toast.makeText(this, "You pressed the Delete!",
                 Toast.LENGTH_LONG).show();
        break;


      case R.id.menu_setting:
     Intent intent=new Intent(HomePage.this,Setting.class);
     startActivity(intent);
     finish();
     Toast.makeText(this, "You pressed the Setting!",
     Toast.LENGTH_LONG).show(); break;


    }

    return super.onOptionsItemSelected(item);
}