how to animate new item in listview

Question

i made code that populate listView from EditText view and enter it on button and it all work, BUT when i want to animate new item, that i just entered from EditText i can not do it, because i can not capture moment when listView get that new View. Here how that look:

listaRadnikaArray.add(0,novoIme.getText().toString());
adapter.notifyDataSetChanged(listaRadnikaArray);    
LayoutInflater inflator = getLayoutInflater();
v = inflator.inflate(R.layout.listview_podesavanje, null);
View noviRadnikView = lvRadnici.getChildAt(0);        //this return null or wrong view                                              
noviRadnikView.setAlpha(0);                           // because  listView lvRadnici do not have that new view jet.                           
noviRadnikView.animate().setDuration(500).alpha(1);      // why????

can anyone, please , explain to me what is a problem.

M sure each time you add a new item its the last poaition it takes. Kip store of the position and in the getview method compare the position of the new item and getviews position. If same animate view — Rat-a-tat-a-tat Ratatouille, Feb 07 '14 at 17:00
tnx I did put position on first on deliberately, because i want to put new item on top of list, and that is a part that work just fine. do you want to tell me that listView delay update because i do that? i do have custom array adapter that have hashMap for order in ListAray. — CrazyFox, Feb 07 '14 at 17:16
Is the animation inside the adapter??? If not try putting it inside the adapter — Rat-a-tat-a-tat Ratatouille, Feb 08 '14 at 02:50
thanks mate, but that is not reason for this problem. after 2 day research i found that best way to work around this problem is using viewTreeObserver class. — CrazyFox, Feb 08 '14 at 11:49

score 0 · Accepted Answer · edited May 23 '17 at 11:43

0

here some solution of this problem How can you tell when a layout has been drawn? or When Can I First Measure a View?

or there is example from DevByts https://www.youtube.com/watch?v=1wyhY68esZY

and who ever put negativ vote on question is noob, because i spend a lot of time to find solution and it is not simple problem.

edited May 23 '17 at 11:43

Community

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answered Feb 08 '14 at 11:57

CrazyFox

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how to animate new item in listview

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