Create menu

When the Menu button is press on the phone, you can show up a menu to let user do something

public boolean onKeyDown(int keyCode, KeyEvent event){
    if(keyCode == KeyEvent.KEYCODE_MENU) {
         AlertDialog.Builder dialogBuilder = 
             new AlertDialog.Builder(this)
             .setMessage("Dialog Message")
             .setTitle("The Title");
         dialogBuilder.create().show();
         return true;
         }
     return super.onKeyDown(keyCode, event);
}