Android 菜單 Menu

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
//        getMenuInflater().inflate(R.menu.main, menu);

        MenuItem menuSys = menu.add(1001, 100, 1, "系統菜單");
        menuSys.setTitle("菜單一"); /* 最多能夠顯示6個子菜單 */

        MenuItem menuUser = menu.add(1001, 101, 1, "用戶菜單");
        menuUser.setTitle("菜單二");
        menuUser.setShortcut('c', 'c'); /* 給菜單設置快捷鍵 */

        MenuItem menuCust = menu.add(1001, 102, 1, "客戶菜單");
        menuCust.setTitle("菜單三");

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        switch (item.getItemId()) {
        case 100:
            Toast.makeText(MainActivity.this, "選擇了菜單一", 1).show();
            Intent intent = new Intent(MainActivity.this, NextActivity.class);
            item.setIntent(intent); /* 切換到第二個Activity */
            break;
        case 101:
            Toast.makeText(MainActivity.this, "選擇了菜單二", 1).show();
            break;
        case 102:
            Toast.makeText(MainActivity.this, "選擇了菜單三", 1).show();
            break;
        default:
            break;
        }

        return super.onOptionsItemSelected(item);
    }