How to store random values of Array list in list view?

Question

I have an array list which have multiple values. I am performing Random function on array list and I want to store each random value which occurs lets say on a click of a button in list view. How can I do that?

Int rand;
String[] listv={"one","two","three","four","five"}
rand=(int)(Math.random()*5);
ArrayList<String> planetList = new ArrayList<String>();  planetList.addAll(Arrays.asList(listv[rand]));
adapter = new ArrayAdapter<String>(this, R.layout.txtlay,planetList);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);

your question is unclear to me. Do you know Collections.shuffle()? — Christopher, Mar 01 '16 at 11:08
how should i store value in listview whenever i click on a button where i am performing shuffling @Christopher — n.sharma, Mar 01 '16 at 11:37
Possible duplicate of [Populating a ListView using ArrayList?](http://stackoverflow.com/questions/5070830/populating-a-listview-using-arraylist) — Elltz, Mar 01 '16 at 11:47

score 0 · Answer 1 · answered Mar 01 '16 at 11:41

Use two different lists: The first one contains all possible values, the second one contains all randomly added values for the list view.

Create an empty List rndValues
Create your adapter with that empty list
Set the adapter to your listView
On your event (for example the button_click) add a random value of your listv to rndValues
Call notifyDataSetChanged() on your adapter to update your list view

How to store random values of Array list in list view?

1 Answers1