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c#androidandroid-fragmentsandroid-activityxamarin
NoobMaster
NoobMaster

Reputation: 27

Send data from fragment to activity android C#

i'm new to xamarin android. i want to send data from fragment to MainActivity. i searched google a lot almost all of them was in Java.

Upvotes: 1

Views: 1067

Answers (2)

Taier
Taier

Reputation: 2119

You can do that by using Delegates:

Define delegates in your Fragment class

namespace Awesome.Android {
     public class AwesomeFragment : Fragment {

       public delegate void OnAwesomePress (int number);
       public event OnAwesomePress sendOnAwesomePressEvent;
     }
}

You can assign it when you create a Framgent

AwesomeFragment fragment = new AwesomeFragment ();
fragment.OnAwesomePress += OnAwesomePress;

After that, you implement OnAwesomePress in your activity

private void OnAwesomePress (int number) {

}

Now, when you call sendOnAwesomePressEvent in your Fragment, that event will be passed to Activity.

sendOnAwesomePressEvent (10);

Upvotes: 1

igorc
igorc

Reputation: 2034

You have few options:

  1. Access the parent activity.
    Create a function called SetData(data) in your activity class. Your fragmnet have the "Activity" property, so cast to your activity type and then call the setData function with your data.

    ((ParentActivity)this.Activity).SetData(data);

  2. Use the SharedPreferences
    Set (in fragment):

    ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(context); 
ISharedPreferencesEditor editor = prefs.Edit();
editor.PutString("my_data", "some_data");
editor.Apply();

    Get (in activity):

    ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences (context);
String myData = prefs.GetString ("my_data", "");

Upvotes: 1

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