Question

我的导航抽屉包含很少的菜单项。我正在尝试实现菜单项单击事件，但单击事件根本没有注册。

这是我的抽屉：

   drawerLayout = FindViewById<DrawerLayout>(Resource.Id.drawer_layout);
            // Create ActionBarDrawerToggle button and add it to the toolbar  
            var toolbar = FindViewById<V7Toolbar>(Resource.Id.toolbar);
           // toolbar.InflateMenu(Resource.Menu.top_menus);
            SetSupportActionBar(toolbar);


            var drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, Resource.String.drawer_open, Resource.String.drawer_close);
            drawerLayout.SetDrawerListener(drawerToggle);
            drawerToggle.SyncState();
            navigationView = FindViewById<NavigationView>(Resource.Id.nav_view);
            setupDrawerContent(navigationView);

这是setupDrawerContent代码：_

void setupDrawerContent(NavigationView navigationView)
    {
        navigationView.NavigationItemSelected += (sender, e) =>
        {
            e.MenuItem.SetChecked(true);
            drawerLayout.CloseDrawers();
        };
    }`

这是OnCreateOptionsMenu代码：

  public override bool OnCreateOptionsMenu(IMenu menu)
    {
        navigationView.InflateMenu(Resource.Menu.nav_menu); //Navigation Drawer Layout Menu Creation  
      //MenuInflater.Inflate(Resource.Menu.nav_menu, menu);
        return base.OnCreateOptionsMenu(menu);
        //return true;
    }

这是OnOptionsItemSelected代码：

  public override bool OnOptionsItemSelected(IMenuItem item)
    {

        switch (item.ItemId)
        {

            case Resource.Id.nav_sangli:

                return true;
            case Resource.Id.nav_solapur:


                return true;


            default:
                break;
        }

        return base.OnOptionsItemSelected(item);

    }

问题是调试器甚至没有达到OnOptionsItemSelected

我尝试过xamarin论坛，但没有任何效果。 TIA

Answer 1

您使用了错误的构造函数ActionBarDrawerToggle https://developer.android.com/reference/android/support/v7/app/ActionBarDrawerToggle.html

你正在使用这个：

ActionBarDrawerToggle (Activity activity, 
                DrawerLayout drawerLayout, 
                Toolbar toolbar, 
                int openDrawerContentDescRes, 
                int closeDrawerContentDescRes)

尝试使用这个：

ActionBarDrawerToggle (Activity activity, 
                DrawerLayout drawerLayout, 
                int openDrawerContentDescRes, 
                int closeDrawerContentDescRes)

所以这样定义抽屉：

 var drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, Resource.String.drawer_open, Resource.String.drawer_close);

将工具栏设置为：

SetSupportActionBar(toolbar);

通常会触发事件

更新：别忘了添加：

navigationView.NavigationItemSelected += NavigationView_NavigationItemSelected;

这是抽屉式参数：改变这一行：

var drawerToggle = new ActionBarDrawerToggle(this, drawerLayout,Resource.String.drawer_open, Resource.String.drawer_close);

到：

`var drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, Resource.String.drawer_open, Resource.String.drawer_close);`

Xamarin导航抽屉菜单项单击事件未处理

1 个答案: