Android independent buttons and menu keys open menu

I won't talk much about it.

Go directlyCode

Package COM. example. menutest2; import android. OS. bundle; import android. app. activity; import android. util. log; import android. view. menu; import android. view. menuitem; import android. view. view; import android. view. view. onclicklistener; import android. widget. button; public class mainactivity extends activity {button; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main); button = (button) findviewbyid (R. id. button2); button. setonclicklistener (New myonclicklistener ();} class myonclicklistener implements onclicklistener {public void onclick (view arg0) {// todo auto-generated method stubopenoptionsmenu ();}} @ overridepublic void openoptionsmenu () {// todo auto-generated method stubsuper. openoptionsmenu () ;}@ overridepublic Boolean oncreateoptionsmenu (menu) {// todo auto-generated method stubsuper. oncreateoptionsmenu (menu); int group1 = 1; int gourp2 = 2; menu. add (group1, 1, 1, "item 11"); menu. add (group1, 2, 2, "item 12"); menu. add (gourp2, 3, 3, "item 23"); menu. add (gourp2, 4, 4, "item 24"); Return true ;}@ overridepublic Boolean onoptionsitemselected (menuitem item) {// todo auto-generated method stubswitch (item. getitemid () {// respond to each menu item (by the menu item ID) Case 1: // do something herelog. I ("menutest:", "itemselected: 1"); break; Case 2: // do something herelog. I ("menutest:", "itemselected: 2"); break; Case 3: // do something herelog. I ("menutest:", "itemselected: 3"); break; Case 4: // do something herelog. I ("menutest:", "itemselected: 4"); break; default: // for events not processed, hand it to the parent class to process return Super. onoptionsitemselected (item);} // return true indicates that the menu item event is processed and does not need to be propagated. Return true ;} // @ override // public Boolean oncreateoptionsmenu (menu) {// getmenuinflater (). inflate (R. menu. activity_main, menu); // return true ;//}}

There is nothing to say about the above Code.

It is called when a key response is created:

 
Openoptionsmenu. Of course, if the menu still does not appear, you can refer to another blog:
 

Android does not display menu buttons.

Http://blog.csdn.net/penglijiang/article/details/7844514