Android 創建子菜單的方法

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
                        //重寫onCreateOptionsMenu(Menu menu)方法實現創建選項菜單
        SubMenu sub=menu.addSubMenu("搜索");//添加子菜單
        sub.setIcon(android.R.drawable.ic_menu_search);
        sub.add(0, MENU_LOCAL, 0, "本地");
        sub.add(0, MENU_INTERNET, 0, "網絡");
        return true;
    }
 public boolean onOptionsItemSelected(MenuItem item) {
    //重寫onOptionsItemSelected(MenuItem item)方法實現事件監聽
        super.onOptionsItemSelected(item);
        switch (item.getItemId()) {
         case MENU_LOCAL:
            //處理點擊事件
          break;
        }
實現子菜單的功能的步驟：
1。重新實現public boolean onCreateOptionsMenu(Menu menu)
2。重新實現public boolean onOptionsItemSelected(MenuItem item)