Setting content description for option menu android Talkback

MenuItemCompat in the v4 support libraries has a

android.support.v4.view.MenuItemCompat.setContentDescription(MenuItem menuItem, CharSequence contentDescription) 

method for backwards compatibility on pre-Oreo devices.

For AndroidX see this answer:

https://stackoverflow.com/a/57950952/1236327

As my investigation, in Android internal source code, class ActionMenuItemView.java method setTitle(CharSequence title), the source code also sets setContentDescription(title), so Android will read your MenuItem's text as default. I don't know why the core has so inflexible in this case.

Updated:

Thanks for @sofakingforever answer.

Seem Google just added the setContentDescription(CharSequence contentDescription) method to the MenuItem class on API 26 (Android O).

Updated: Thanks for new @tim.paetz answer . Look like all versions are now supported setContentDescription for menu item using android support v4 libraries.