OnCreateOptionsMenu not called on Android 7.0

Question

As mentioned in the title, the OnCreateOptionsMenu method is not called after I upgraded my system to Android 7.0.

Before upgrading, I used Android 6.0 and it worked without any problems. If I test it on another phone with 6.0, it still works (same code).

Are there any problems with this method on Android 7.0 or is there something wrong in my code?

The part of my MainActivity.cs where I installed the toolbar

[Activity(Label = "App", Icon = "@drawable/icon", MainLauncher = true, Theme = "@style/Theme.AppCompat.Light.NoActionBar",ScreenOrientation = Android.Content.PM.ScreenOrientation.Portrait)]
public class MainActivity : AppCompatActivity
{
    protected override void OnCreate(Bundle bundle)
    {
         base.OnCreate(bundle);
         SetContentView(Resource.Layout.Main);

         var toolbar = FindViewById<Android.Widget.Toolbar>(Resource.Id.toolbar);
         toolbar.SetTitleTextColor(Color.White);
         SetActionBar(toolbar);
    }

    public override bool OnCreateOptionsMenu(IMenu menu)
    {
        MenuInflater.Inflate(Resource.Menu.top_menu_start, menu);
        return base.OnCreateOptionsMenu(menu);
    }
}

Main.axml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#1D1D1D"
        android:theme="@android:style/ThemeOverlay.Material.Dark.ActionBar" />
</RelativeLayout>

top_menu_start

<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item
       android:id="@+id/start_listview"
       android:icon="@drawable/icon_posts_list"
       android:showAsAction="ifRoom"
       android:title="startListview" />
  <item
       android:id="@+id/start_pager"
       android:icon="@drawable/icon_posts_kacheln"
       android:showAsAction="ifRoom"
       android:title="startPager" />
  <item
       android:id="@+id/doSomething"
       android:icon="@drawable/icon"
       android:showAsAction="ifRoom"
       android:title="doSomething" />
</menu>

Answer 1

AppCompatActivity, Android.Support.V7.Widget.Toolbar Android.Widget.Toobar SetSupportActionBar SetActionBar. OnCreateOptionsMenu .

OnCreate override:

base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Main);
var toolbar = FindViewById<Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
toolbar.SetTitleTextColor(Color.White);
SetSupportActionBar(toolbar);

Main.axml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#1D1D1D"        android:theme="@android:style/ThemeOverlay.Material.Dark.ActionBar">
    </android.support.v7.widget.Toolbar>