用xml配置文件：

//创建菜单         public boolean onCreatOptionsMenu(Menu menu){        MenuInflater mm =getMenuInflater();        mm.inflate(R.menu.n, menu);         return false;              }     //处理菜单事件         public boolean onOptionsItemSelected(MenuItem item){        int id = item.getItemId();        switch(id){                case R.id.item1:            Toast.makeText(this, "触发了菜单", 5000).show();            break;        case R.id.item2:        break;                }        return false;            }

通过代码创建：

public boolean onCreatOptionsMenu(Menu menu){        menu.add(0,0,0,"菜单1");                menu.add(0,1,1,"菜单2");                return false;              }