CODEWITHSUNDEEP
androidxamarin
user3789938
user3789938

Reputation: 3

i am getting error:object reference not set to an instance of object

I am getting when trying to set navigation mode how to resolve it

[Activity(Label = "@string/app_name", MainLauncher = true)]

public class MainActivity : Activity,ActionBar.ITabListener {

     private ActionBar ab;
     protected override void OnCreate (Bundle bundle)
      {

        base.OnCreate (bundle);
        try{
           //here i am getting instance of action  bar
            ab = ActionBar;
        **i am getting error at this line **

                     ab.NavigationMode = ActionBarNavigationMode.Tabs;


            // Set our view from the "main" layout resource
            SetContentView (Resource.Layout.Main);



}
}

Upvotes: 0

Views: 1499

Answers (1)

Chris
Chris

Reputation: 3338

I ran your code, with the only exception that i did not impliment the ITabListener, and it works. 

[Activity (Label = "@string/app_name", MainLauncher = true)]

    public class MainActivity : Activity
    {

        private ActionBar ab;

        protected override void OnCreate (Bundle bundle)
        {

            base.OnCreate (bundle);


try {
            //here i am getting instance of action  bar
            ab = ActionBar;
        **i am getting error at this line **

            ab.NavigationMode = ActionBarNavigationMode.Tabs;


            // Set our view from the "main" layout resource
            SetContentView (Resource.Layout.Main);



        } catch (Exception ex) {
            throw ex;
        }
    }

}

I have never seen someone using an actionbar by implimenting the ITabListener ( on xamarin ). I would sugest you take the xamarin way of building up an actionbar. Here is a link to the documentation.

Upvotes: 2

Related Questions