How to set an image in an ImageView inside an ExpandableListView group dynamically?

Question

I have a bitmap on Activity and I want to set that bitmap to an ImageView in a group in an ExpandableListView.
How can I do this?

Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));                      (Expandablelistview.imageview).setImageBitmap(bitmap);

I need a particular group of my ExpandableListView and then set that ImageView there.
I need this View reference in the Activity.

Possible duplicate of [Android set bitmap to Imageview](http://stackoverflow.com/questions/15323844/android-set-bitmap-to-imageview) — 476rick, Dec 20 '16 at 09:57
how can i get imageview which is set in adapter? because group view of expandablelistview is declare in adapter. Hope u understand what i want — Zaki Pathan, Dec 20 '16 at 09:58
Every view has their unique id .. find it and setview in it.. — Mr.Popular, Dec 20 '16 at 10:01
but i have multiple groups in expandablelistview. so how can i get imageview of particular group in activity? — Zaki Pathan, Dec 20 '16 at 10:02
I have to pick image on click of imageview from gallery and set it to that particular imageview. But the problem is i got bitmap in onActivityResult() in activity. so how can i set expandablelistviews group imageview from there? — Zaki Pathan, Dec 20 '16 at 10:05

score 0 · Accepted Answer · answered Dec 20 '16 at 10:08

0

create array of holders

  ArrayList<ViewHolder> holders = new ArrayList<>();


public class ViewHolder {
    ImageView iv;
}

@Override
public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) {

   ViewHolder holder = new ViewHolder();
    holder.iv = (ImageView)view.findViewById(R.id.imageView);
    holders.add(holder);
    return null;

}

hope you have idea about ViewHolders.. and finally in your activity find the view by the following code and set imageview

holders.get(POSITIONOFLIST).iv.setImageBitmap(bitmap);

hope it helps.

answered Dec 20 '16 at 10:08

Mr.Popular

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I am not getting any ViewHolder in my adapter. Sorry but please help I am new – Zaki Pathan Dec 20 '16 at 10:18
now got it. thank u so much. I just test this code and then response. thanks alot – Zaki Pathan Dec 20 '16 at 10:20
if it satisfies then you can select this as accepted answer nah? – Mr.Popular Dec 20 '16 at 10:52

How to set an image in an ImageView inside an ExpandableListView group dynamically?

1 Answers1