how do i keep adding data to an array to be displayed in a listview in xamarin for android

Question

so far i have this:

btnAddContact.Click += delegate {
            String[] nameList = new string[]{nameText.Text, ipText.Text};

            var myAdapter = new ArrayAdapter(this, Resource.Layout.TextViewItem, nameList);
            contactView.Adapter = myAdapter;
            myAdapter.NotifyDataSetChanged();
            nameText.Text = "";
            };

Two EditText fields, a button and a ListView - when i add data into the two text fields and click the button it adds the data to an array and then displays it in the ListView.. except if i try to add another value to the array via the text fields, it just changes what was already entered..

how do i do this so it keeps adding the data forming a list?

Scott Wright · Accepted Answer · 2013-03-20 14:02:58Z

1

Figured it out on my own.. This is something other people told me could only be achieved through a custom adapter so it may be useful to someone else.

Created a public array

public ArrayList nameList = new ArrayList ();

then on a button click, assigned the add to array code.

btnAddContact.Click += delegate {
            nameList.Add(nameText.Text + " " + ipText.Text);
            var myAdapter = new ArrayAdapter(this, Resource.Layout.TextViewItem, nameList);
            contactView.Adapter = myAdapter;
            myAdapter.NotifyDataSetChanged();
            nameText.Text = "";
            ipText.Text = "";
            };

This puts the name and ip address on the same line with a space in between so it's easily readable.

answered Mar 20, 2013 at 14:02

Scott Wright

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2 Comments

Cheesebaron Over a year ago

Pull out line 3 and 4 out of your Click handler and put them in OnCreate. No reason to override the Adapter all the time.

Softlion Over a year ago

In fact it won't work if not overriding the adapter. Instead it will crash, because ArrayAdapter has probably a bug.

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