android - Xamarin Listview grouping -

i dealing listview in xamarin.froms. can populate listview listitem each record:

[     {"cat":1, "name":"alpha"},     {"cat":1, "name":"beta"},     {"cat":1, "name":"gamma"},     {"cat":2, "name":"john"},     {"cat":2, "name":"william"},     {"cat":2, "name":"smith"},     {"cat":2, "name":"steve"},     {"cat":3, "name":"abc"},     {"cat":3, "name":"xyz"} ] 

//9 items in listview json source

but want group items on key value, "cat" here , achieve this:

any suggestion or approach toward appreciated.

you need enable grouping this:

    mylistview.isgroupingenabled = true;     mylistview.groupdisplaybinding = new binding("groupkey"); // see below 

and add data in groups (e.g. lists of lists). means need create own class show groupings, such as:

    public class grouping<k, t> : observablecollection<t>     {         // nb: groupdisplaybinding above displaying header         public k groupkey { get; private set; }           public grouping(k key, ienumerable<t> items)ac         {             groupkey = key;             foreach (var item in items)                 this.items.add(item);         }     } 

and finally, add data in groups:

    var groups = new observablecollection<grouping<string, mydataclass>>();      // can pass set of data in (where "groupa" enumerable set)     groups.add(new grouping<string, mydataclass>("groupa", groupa));       // or filter down set of data     groups.add(new grouping<string, mydataclass>("groupb",          myitems.where(a => a.somefilter())));      mylistview.itemsource = groups; 

bind cell mydataclass have before:

    var cell = new datatemplate(typeof(textcell));     cell.setbinding(textcell.textproperty, "somepropertyfrommydataclass");     cell.setbinding(textcell.detailproperty, "otherpropertyfrommydataclass");     mylistview.itemtemplate = cell; 

credit link in @pnavk's answer.
check out explanation on why use template k instead of string in grouping class, how customise header look, , more:
http://motzcod.es/post/94643411707/enhancing-xamarinforms-listview-with-grouping