Answers

• TripleDouble BGMember ✭✭✭

  June 2017

  {
  Toast.MakeText(this, "Plan deleted...", ToastLength.Short).Show();
  NotifyDataSetChanged();
  };
  dialog.OnSave += delegate
  {
  Toast.MakeText(this, "Plan saved!", ToastLength.Short).Show();
  NotifyDataSetChanged();
  };

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• mikoo DKMember ✭✭

  June 2017

  I cant do that , because the adapter is in a Fragment, and saving and deleting is in a separate DialogFragment, both managed by the MainActivity.

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• mikoo DKMember ✭✭

  June 2017

  bump

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• DimChris USMember ✭✭✭✭

  June 2017 edited June 2017

  Here is an example of how i use a dialogfragment
  Here is my class

      public class CreateContactEventArgs : EventArgs
  {
      public string txtTableNumber { get; set; }
  
      public CreateContactEventArgs(string newtablenumber)
      {
          txtTableNumber = newtablenumber;
  
      }
  }
  class NumPadClass : DialogFragment
  {
      private Button mButtonCreateContact;
      private Button mButtonCreateCancel;
      private EditText txtTableNumber;
      public event EventHandler<CreateContactEventArgs> OnCreateContact;
      public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
      {
          base.OnCreateView(inflater, container, savedInstanceState);
          var view = inflater.Inflate(Resource.Layout.NumPad, container, false);
          mButtonCreateContact = view.FindViewById<Button>(Resource.Id.OKButton);
          mButtonCreateCancel = view.FindViewById<Button>(Resource.Id.CancelButton);
          txtTableNumber = view.FindViewById<EditText>(Resource.Id.NewTableNumber);
  
  
          mButtonCreateContact.Click += mButtonCreateContact_Click;
          mButtonCreateCancel.Click += MButtonCreateCancel_Click;
          return view;
      }
      public override void OnActivityCreated(Bundle savedInstanceState)
      {
          Dialog.Window.RequestFeature(WindowFeatures.NoTitle);
          base.OnActivityCreated(savedInstanceState);
  
      }
  
      private void MButtonCreateCancel_Click(object sender, EventArgs e)
      {
          this.Dismiss();
      }
  
  
      void mButtonCreateContact_Click(object sender, EventArgs e)
      {
  
          if (OnCreateContact != null)
          {
              //Broadcast event
              OnCreateContact.Invoke(this, new CreateContactEventArgs(txtTableNumber.Text));
          }
  
          this.Dismiss();
  
  
  
      }
  }
  

  }

  And this is in my main Activity

      private void Button1_Click(object sender, EventArgs e)
      {
  
              NumPadClass dialog = new NumPadClass();
              FragmentTransaction transaction = FragmentManager.BeginTransaction();
              dialog.OnCreateContact += dialog_OnCreateContact;
              dialog.Show(transaction, "New TableNumber");
  
      }
      void dialog_OnCreateContact(object sender, CreateContactEventArgs e)
      {
  
          if (e.txtTableNumber != "") // e.txtTableNumber is assign it into my class and then i use it in my Activity
          {
  
          }
      }
  

  This Tutotial will be very usefull

  

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• mikoo DKMember ✭✭

  June 2017

  Joe is good, Problem is that i have one activity with the navigation drawer layout, and each menu item is a fragment, which can have buttons to go to another fragment. when I enter the fragment with the listview, and click on an item, the fragment triggers an event which is captured by the main activity (code snippet from above), and it in turns opens a dialog fragment with a delete button. when i press delete, i expect on a high level to make the corresponding item from the list view disappear. i just dont know how to do it. im thinking through an event or by passing a variable or something, i dont know really.

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• mikoo DKMember ✭✭

  June 2017 Accepted Answer

  I did it. I put the dialog fragment inside the fragment class and passed the variables there:

  using Android.App;
  using Android.Content;
  using Android.OS;
  using Android.Views;
  using Android.Widget;
  using System;
  using System.Collections.Generic;
  
  namespace Zrelya.Fragments
  {
      public class OnSelectedEventArgs : EventArgs
      {
          public ORM.Plan Plan { get; set; }
  
          public OnSelectedEventArgs( ORM.Plan plan )
          {
              Plan = plan;
          }
      }
  
      public class ViewPlans : FragmentSuper
      {
          private Context mContext;
          private ORM.DBRep dbr;
  
          private static Adapters.Plan Adapter;
          private static ListView listView;
  
          public EventHandler<OnSelectedEventArgs> OnSelected;
  
          public ViewPlans(Context context)
          {
              mContext = context;
          }
  
          public override void OnCreate(Bundle savedInstanceState)
          {
              base.OnCreate(savedInstanceState);
  
              // Create your fragment here
  
              dbr = new ORM.DBRep();
          }
  
          public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
          {
              // Use this to return your custom view for this Fragment
              var view = inflater.Inflate(Resource.Layout.ViewPlans, container, false);
              listView = view.FindViewById<ListView>(Resource.Id.listView);
  
  
              List<ORM.Plan> plansList = dbr.GetPlans();
              Adapter = new Adapters.Plan(mContext, plansList);
  
  
              listView.Adapter = Adapter;
  
  
              listView.ItemClick += (o, e) =>
              {
                  int id = plansList[e.Position].Id;
  
                  var plan = plansList[e.Position];
  
                  DialogViewPlan(plan);
  
                  //OnSelected.Invoke(this, new OnSelectedEventArgs(plansList[e.Position]));
              };
  
              return view;
          }
  
          private void DialogViewPlan(ORM.Plan plan)
          {
              if (plan != null)
              {
                  FragmentTransaction transaction = Activity.FragmentManager.BeginTransaction();
                  Helpers.DialogViewPlan dialog = new Helpers.DialogViewPlan(Activity, plan);
                  dialog.Show(transaction, "dialog");
                  dialog.OnDelete += delegate
                  {
                      ORM.DBRep dbr = new ORM.DBRep();
                      dbr.DeletePlan(plan);
                      Adapter.NotifyDataSetChanged();
                      Adapter = new Adapters.Plan(mContext, dbr.GetPlans());
                      listView.Adapter = Adapter;
                  };
                  dialog.OnSave += delegate
                  {
  
                  };
  
              }
          }
      }
  }
  

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