I use this code
ActionMenuItemView item = (ActionMenuItemView) findViewById(R.id.my_item_id);
item.setTitle("Test String");
and get the error
ActionMenuItemView.setTitle can only be called from within the same library group (groupId=com.android.support)
I use the Android SDK 27 with Java 8 support activated. All related issues I found were bugs in previous releases of older Android versions. But I use the latest one.
The app runs though anyway. But how to get rid of that error without only suppressing it?