Button to Open New Activity from fragment

Qing Ryder

8y4.6kLearn iOS Programming

I am trying to Open a new Activity from a fragment with the following code

Button button = view.FindViewById
button.Click += StartNewActivity;
void StartNewActivity(object sender, EventArgs e)
{
Intent intent = new Intent(this.Activity, typeof(fragment4));
StartActivity(intent);
}

But i get the following errors

Any Idea is Ultimately Welcomed!

7 Replies

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Qing Ryder8y ago
I am trying to Open a Fragment Using the button click with the below code
Button button = view.FindViewById

           button.Click += StartNewActivity;



           void StartNewActivity(object sender, EventArgs e)

           {

               FragmentTransaction ft = FragmentManager.BeginTransaction();

               Fragment4 f4 = new Fragment4();

               // The fragment  that will have the ID of Resource.Id.fragment_container.

               ft.Show(f4);

           }

and on the fragment4.cs
using Android.OS;

using Android.Support.V4.App;

using Android.Views;

using System.Collections.Generic;

using Android.Widget;

using System;



using Android.Content;



namespace App6.Fragments

{

    public class Fragment4 : Fragment

    {



        public override void OnCreate(Bundle savedInstanceState)

        {

            base.OnCreate(savedInstanceState);

        }

        public static Fragment4 NewInstance()

        {

            var frag4 = new Fragment4 { Arguments = new Bundle() };

            return frag4;

        }

        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)

        {

            // Use this to return your custom view for this Fragment

            // return inflater.Inflate(Resource.Layout.YourFragment, container, false);



            var ignored = base.OnCreateView(inflater, container, savedInstanceState);

            return inflater.Inflate(Resource.Layout.fragment4, null);

        }

    }

}
When i run the Application, and click the button, nothing happens
Qing Ryder8y ago
I think its better using a fragment
because from your refrence, it means i will be adding the navigation to my activity again
Amit Gupta8y ago
Yes, you can use multiple activities with Navigation Drawer but you have to add the Navigation drawer to each activities layout file.

Activity is like a new window whereas Fragment is like a page in a window.

However, it depends what product you are building, if it is for learning purpose, you can go through the below link that might be useful to you.

https://www.c-sharpcorner.com/article/xamarin-android-create-android-navigation-drawer-layout-using-support-design/

More references:
https://www.google.com/search?safe=active&source=hp&ei=e77sWqOSL4TK0gTuxpyQBA&q=activity+with+navigation+drawer+in+xamarin.android&oq=activity+with+navigation+drawer+in+xamarin.android
Qing Ryder8y ago
Works After adding
{ [Activity (Label = "**")] public class ** : Activity {
but it the activity overides my Nav_header and Menu
how do i add them to it or do i better stil use a fragment??
Amit Gupta8y ago
The code for starting an activity is correct (as enclosed in snapshot). Just make sure the class file of fragment4 is a type of Activity.

However, the error shows that the activity could not be found, try to clean and rebuild the project or show your fragment4 class.

Moreover, make a habit to give proper naming convention to the control else it will became too hard for maintainance and time consuming.
Qing Ryder8y ago
Its an AppcompactV7 Activity
Amit Gupta8y ago
What type of fragment4 is? Is it an activity or fragment.