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Questions tagged [convertview]

ConvertView represents one of the parameters of the `getView` method of various Android adapters, often used to improve the performance of that adapter.

The convertView is a parameter in the getView method of all Android adapters. This convertView represents a recycled row view(if it is not null) which should always be used in the getView method to avoid the costly creation of objects every time the adapter is required to supply a row view from its getView method. A typical use pattern of the convertView in the getView method is:

  • check if the convertView is null.
  • if the convertView is null then the getView method must build the entire row view as there is no recycled view available.
  • if the convertView is not null then the getView method is supplying a recycled view on which the only needed actions are to setup the correct data/information.

More information about the convertView importance and use can be found in the Google I/O video about Android performance.

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Using ConvertView behaves different on Samsung devices

I wrote an implementation of BaseExpandableListAdapter which overrides as well the getChildType and getChildView methods. There are 10 Groups, 4 of them have children. The following implementation works on the emulator and on tested htc devices.…
Diego Frehner
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Items confusing when scrolling Listview (recycler)

I display a countdown timer in each item of my listvew (in a TextView), that I update every second. It works perfectly as every item has its very own correct timer. But whenever the listview gets longer and obliges me to scroll down or up, the items…
Adel
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Cannot resolve symbol "ConvertView"

I'm following this tutorial to implement Expandable ListView: https://www.youtube.com/watch?v=GD_U0-N3zUI&t=404s I did everything same as in it, But: @Override public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) { …
Zubair Younas
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My convertView in getView does not seem to be implemented properly, can you tell me why?

My listView seems to load correctly but on testing I think there's something wrong with it. I'm looking at this tutorial : http://android.amberfog.com/?p=296#more-296 I've added the line: System.out.println("getView " + position + " " +…
CHarris
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Android Studio; What is the point of inflating and saving a view into convertView?

@Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null){ convertView = ContactViewActivity.this.getLayoutInflater().inflate(R.layout.contact_view_field_row, parent, false); } String value =…
Stephen Kandeh
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ClassCastException in TypeHolder Android

I have made a ListView and I want to inflate different xml file depending on the value of iMsg and uMsg (either one of them will always be blank, so the other should be inflated). There are 2 xml files I am having. Both having a TextView with…
Saurabh Mhase
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How to get ArrayList image URLs into ImageView of ListView getView method

@Override public View getView(int position, View convertView, ViewGroup parent) { if(convertView == null){ convertView = inflater.inflate(resource, null); } ImageView imageView; imageView = (ImageView)…
Safiullah
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Result asyntask execute cant load fast and value change after scroll listview

I have adapter and inside adapter there are asyntask. Show layout badge cant load fast and when i scroll value change randomly. My adapter private class MyAdapter extends ArrayAdapter { ConvertView holder = null; public…
Nur Sholeh
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Should I use convertView in my ArrayAdapter if I dont inflate?

I see a lot of SO posts about the usefulness of using convertView in Adapters, like this one, this one or this one (and many others...) I have an ArrayAdapter, but I create the view from scratch, with a simple horizontal LinearLayout in which I add…
Dan Chaltiel
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How to display different color text in ListView item row using a Custom Adapter?

My ListView implements the ContextMenu when each row is LongPressed. I decided to include more static data separated by commas along with each string taken from the ArrayList to populate the contextMenu - and it works fine. My question is how do I…
user1272377
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setBackgroundColor (ListView) depend on the data

I'm going to create a dynamic ListView that display data from server with json. I want to make a setBakgroundColor depend on some object in the data. for example: json…
Hussain Aali
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should I always use convertView as my main ViewElement in Base adapter?

the variable convertView in getView of BaseAdapter . What is it for? when creating items should I always use convertView? What is the problem if I don't use it?
JITHIN GOPAL
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Text values has order changes when scroll the listview in android

When I click to edit my EditText in my list-view, the order of items change. I think the problem is on adapter, but I don't know how to fix it. Ex.: The last item goes to second position. Adapter: public class adapterAvaliacao extends BaseAdapter…
Vitor Rocha Sachini
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convertview listview adapter EditText confuse

I have a listView filled with a custum class extends BaseAdapter private List allTipologiaInsetti = ....; listView.setAdapter(new CustumAdapter(getBaseContext(), allTipologiaInsetti, this)); Then on my Adapter.. public class CustumAdapter…
Crifano Stefano
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returning different views in listview

I have a custom listview and want to return / inflate depending on condition. i want rows displayed or not displayed depending on a condition. In getView() i have the following if (convertView == null) { // Inflate the layout …
Ingolf Krauss
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