c# - Android Xamarin NavigationView handling event error -


i working on navigationview make easy menu following tutorial : http://maximeesprit.com/en/xamarin-android-actionbar-en/

but have problem following menu items don't send events

my menu looks :

navigationview menu

and main.xml code : 

    <?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:fitssystemwindows="true"     android:id="@+id/maintactivity_drawerlayout">   <android.support.design.widget.navigationview       android:layout_width="wrap_content"       android:layout_height="match_parent"       android:layout_gravity="start"       android:id="@+id/maintactivity_navigationview"       app:menu="@menu/left_menus" />   <linearlayout         android:layout_width="match_parent"         android:layout_height="240dp"         android:orientation="vertical"         android:gravity="bottom"         android:layout_marginleft="16dp"        android:id="@+id/container_layout">      <framelayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:id="@+id/framelayout_viewforfragments" />   </linearlayout> </android.support.v4.widget.drawerlayout>

and mainactivity.cs file :

using android.app; using android.widget; using android.os; using android.support.v7.app; using android.views; using android.support.v4.widget; using android.support.design.widget; using android.support.v4.view; // install nuget android.support.design // , app compat support namespace app4 {     [activity(label = "topsidebar app", mainlauncher = true , icon = "@drawable/ic_launcher")]     public class mainactivity : appcompatactivity     {         drawerlayout m_drawerlayout;         navigationview m_navigationview;         protected override void oncreate(bundle savedinstancestate)         {             base.oncreate(savedinstancestate);              // set our view "main" layout resource             setcontentview(resource.layout.main);              supportactionbar.title = resources.getstring(resource.string.app_name); ;               m_drawerlayout = findviewbyid<drawerlayout>(resource.id.maintactivity_drawerlayout);             m_navigationview = findviewbyid<navigationview>(resource.id.maintactivity_navigationview);             m_navigationview.navigationitemselected += m_navigationview_navigationitemselected;             //display sandwich menu icon             supportactionbar.setdisplayhomeasupenabled(true);             supportactionbar.sethomeasupindicator(resource.drawable.ic_menu_black_24dp_1x);             configurenavigationviewheader();          }          private void configurenavigationviewheader()         {             view viewheader = layoutinflater.inflate(resource.layout.mainactivity_navigationview_header, null);              imageview imageviewuseravatar = viewheader.findviewbyid<imageview>(resource.id.mainactivity_navigationview_header_imageview_useravatar);             textview textviewuserpseudo = viewheader.findviewbyid<textview>(resource.id.mainactivity_navigationview_header_textview_userpseudo);             textview textviewuserdesc = viewheader.findviewbyid<textview>(resource.id.mainactivity_navigationview_header_textview_userdesc);              imageviewuseravatar.setimageresource(resource.drawable.profile_pic);             textviewuserpseudo.text = "housma mardini";             textviewuserdesc.text = "web developer";              m_navigationview.addheaderview(viewheader);         }          private void m_navigationview_navigationitemselected(object sender, navigationview.navigationitemselectedeventargs e)         {              switch (e.menuitem.itemid)             {                 case resource.id.leftmenu_profile:                     toast.maketext(this, "profile", toastlength.short).show();                     m_drawerlayout.closedrawer(gravitycompat.start);                     break;                  case resource.id.leftmenu_shopping_list:                     break;                  case resource.id.leftmenu_favorites:                     break;                  case resource.id.leftmenu_params_option:                     break;                  case resource.id.leftmenu_params_about:                     break;             }           }          public override bool oncreateoptionsmenu(android.views.imenu menu)         {             menuinflater.inflate(resource.menu.top_menus, menu);             return base.oncreateoptionsmenu(menu);         }          public override bool onoptionsitemselected(imenuitem item)         {             switch (item.itemid)             {                 case resource.id.share:                     toast.maketext(this , "share" ,toastlength.short ).show();                     break;                  case resource.id.moreoption:                     toast.maketext(this, "settings", toastlength.short).show();                   break;                  //handle sandwich menu icon click                 case android.resource.id.home:                     //if menu open, close it. else, open it.                     if (m_drawerlayout.isdraweropen(gravitycompat.start))                         m_drawerlayout.closedrawers();                     else                         m_drawerlayout.opendrawer(gravitycompat.start);                     break;             }              return base.onoptionsitemselected(item);         }     } }

but when remove linearlayout , framelayout tags main.xml file every thing working

as discussed mail, here answer :

your activity axml :

<?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:fitssystemwindows="true"     android:id="@+id/maintactivity_drawerlayout">     <framelayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:id="@+id/framelayout_viewforfragments" />   <android.support.design.widget.navigationview       android:layout_width="wrap_content"       android:layout_height="match_parent"       android:layout_gravity="start"       android:id="@+id/maintactivity_navigationview"       app:menu="@menu/left_menus" />     </android.support.v4.widget.drawerlayout>

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