Xamarin Android工具栏如何动态添加项目

Question

I have implemented android toolbar as per the instructions given in xamarin android guides here

using example code:

public override bool OnCreateOptionsMenu(IMenu menu)
        {           
            MenuInflater.Inflate(Resource.Menu.mainMenu, menu);

            return base.OnCreateOptionsMenu(menu);
        }

and xml :

<?xml version="1.0" encoding="utf-8" ?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:local="http://schemas.android.com/apk/res-auto">
  <item
       android:id="@+id/menu_share"
       local:showAsAction="ifRoom"
       android:title="Share" />
  <item
       android:id="@+id/menu_settings"
       local:showAsAction="ifRoom"
       android:title="Settings" />
</menu>

Now i want to add items to toolbar that will come from my web api , they are basically links to our pages such as privacy policy etc. but i cant find any example on menu.Add method that does this. basically what i need is to constrcut meny items from my json which returns:

[{
pageid:1,
pagename:"home",
pagehtmllink:"....."
},
{
pageid:2,
pagename:"About",
pagehtmllink:"....."
},
...........
]

how to achieve this from code behind?

Answer 1

IMenu has an Add method that you can call:

public override bool OnCreateOptionsMenu(IMenu menu)
{
        MenuInflater.Inflate(Resource.Menu.main_menu, menu);

        menu.Add(0, 99, 0, "DB Copy to SDCard (Debug)");

        return base. OnCreateOptionsMenu(menu);
}

For the parameters, review the Android docs: Menu.html#add

To capture the menu selection, you can check the IMenuItem.ItemId value:

public override bool OnOptionsItemSelected(IMenuItem item)
{
    switch (item.ItemId)
    {
        case 99:
            DoSomething();
            return true;
        default:
            return false;
    }
}

Answer 2

You dont need that you can create a tabbed page and on each page you create a webview

public partial class MainPage : TabbedPage
{
    public MainPage()
    {
        InitializeComponent();
        this.BarBackgroundColor = Color.Gray;

        var homePage = new HomePage();
        var accountPage = new AccountPage();
        var ordersPage = new OrdersPage();
        var promotionsPage = new PromotionsPage();
        var searchPage = new SearchPage();

        homePage.Icon = "imgs_main.png";
        accountPage.Icon = "imgs_account.png";
        ordersPage.Icon = "imgs_orders.png";
        promotionsPage.Icon = "imgs_promotions.png";
        searchPage.Icon = "imgs_search.png";

        homePage.Title = "Home";
        accountPage.Title = "Account";
        ordersPage.Title = "Orders";
        promotionsPage.Title = "Promotions";
        searchPage.Title = "Search";

        Children.Add(homePage);
        Children.Add(accountPage);
        Children.Add(ordersPage);
        Children.Add(promotionsPage);
        Children.Add(searchPage);

    }