how to refresh one row in listview android

Question

i have a listview that contains an custom control
my custom control have progress bar in it and i want change the value of progress bar.

int iRowCount = 0;
    CMessage processMessage = null;
    for (CMessage msg : m_msgList)
    {
        iRowCount ++;
        if(msg._id == iMessageId)
        {
            processMessage = msg;
            break;
        }
    }

    if(processMessage == null)
        return;

    if(!processMessage.MessageType.equals(AttachType.Video.name()))
        if(!processMessage.MessageType.equals(AttachType.Audio.name()))
            return;

    int rowPosition = iRowCount; 
    View v = lstMessage.getChildAt(rowPosition);
    View updateView = lstMessage.getAdapter().getView(rowPosition - 1, v, lstMessage);
    ILSpeechBubble sBubble = (ILSpeechBubble) updateView.findViewById(R.id.iLSpeechBubble1);
    if(sBubble.getMessageId() == iMessageId)
    {
        iProgress = sBubble.getProgress();
        if(iProgress == 100)
            m_Downloading = false;
        else
            iProgress += 1;

        sBubble.SetProgress(iProgress);
        sBubble.postInvalidate();
        updateView.postInvalidate();

    }

with this code i can get the row that must changed the progress value
but i cant refresh the layout and progress not changed in ui
but when i scroll the listview, progress value changed.!
and i'dont want to use notifydatasetchanged().
tnx 4 any help

What is the penalty of refreshing the whole view compared to the complexity of maintaining above-alike code? ;) — gunar, Jun 19 '13 at 11:43
there is more item in listview that maybe contains pic,text,audio,video. dont need more cpu usage? — Saeed-rz, Jun 19 '13 at 14:16
at the end i use listview.invalidateViews(); ! it similar notifyDatasetchanged() — Saeed-rz, Jun 30 '13 at 04:48
@Leon_SFS You cannot refresh only single row when you call the notifyDatasetchanged() getview will called and only those view who are visible to the list take cpu usage its not the whole list will refresh. — PiyushMishra, Jun 30 '13 at 05:40
@PiyushMishra yes i know with notifyDatasetchanged entire listview refresh with data,finally i use invalidateviews to refresh listview without getting data — Saeed-rz, Jun 30 '13 at 09:37

score 2 · Answer 1 · answered Jun 19 '13 at 11:12

2

You can refresh your row of listview using below code:

 ListView list = getListView();
    int start = list.getFirstVisiblePosition();
    for(int i=start, j=list.getLastVisiblePosition();i<=j;i++)
        if(target==list.getItemAtPosition(i)){
            View view = list.getChildAt(i-start);
            list.getAdapter().getView(i, view, list);
            break;
        }

answered Jun 19 '13 at 11:12

Sagar Maiyad

12,655
9
63
99

exactly which line refresh the row? – Saeed-rz Jun 19 '13 at 11:34
@Leon_SFS which mentioned in target variable. – Sagar Maiyad Jan 22 '15 at 11:39

score -2 · Answer 2 · edited Mar 24 '14 at 22:04

-2

Use this to clean the adapter:

adapter.items.clear();

edited Mar 24 '14 at 22:04

Guillermo Merino

3,197
2
17
34

answered Mar 24 '14 at 21:28

abelinux

1

Could you write in English, please? – Søren Debois Mar 24 '14 at 21:47
I don't see an adapter anywhere in the code. This answer has no explanation, and doesn't seem to answer the question. – BradleyDotNET Mar 24 '14 at 22:24

how to refresh one row in listview android

2 Answers2