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POListview with or without convertview == null
 

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    <p>I have a dilemma using </p> <pre><code>if (convertview==null){ (my code) } </code></pre> <p>or not. Without this piece of code, my listview is not very fast, it locks for a few ms sometimes and you can easy notice this in use. It just doesn't work how its meant to work.</p> <p>But when this piece of code, my listitems will start recounting after a while (10 or so) and i have a few returning listitems in my list (with the header i used). I used this tutorial for getting my listview with sections <a href="http://bartinger.at/listview-with-sectionsseparators/" rel="nofollow">link</a>. The length of the list is good.</p> <p>Ofcourse my list is totally useless with a view repeating items (nicely sectioned by the way) but i also dont want it to be slow. Does anyone know what to do? Below is my adapter:</p> <p>public class DelftAdapter extends BaseAdapter {</p> <pre><code>private Activity activity; private List&lt;ListItem&gt; listItems; private static LayoutInflater inflater=null; public ImageLoader imageLoader; private final int[] bgColors = new int[] { R.color.list_odd, R.color.list_even }; public DelftAdapter(Activity a, ArrayList&lt;ListItem&gt; li) { activity = a; listItems = li; inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); imageLoader=new ImageLoader(activity.getApplicationContext()); } public int getCount() { return listItems.size(); } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { View vi=convertView; final ListItem li = listItems.get(position); if (li != null) { if(li.isSection()){ // is sectionheader SectionItem si = (SectionItem)li; vi = inflater.inflate(R.layout.sectionedlistitem, null); vi.setOnClickListener(null); vi.setOnLongClickListener(null); vi.setLongClickable(false); final TextView sectionView = (TextView) vi.findViewById(R.id.list_header_title); sectionView.setText(si.getTitle()); }else{ // no sectionheader ListData ld = (ListData)li; vi = inflater.inflate(R.layout.singlelistitem, null); TextView tvNames=(TextView)vi.findViewById(R.id.tvname); TextView tvTip=(TextView)vi.findViewById(R.id.tvtip); ImageView image=(ImageView)vi.findViewById(R.id.image); tvNames.setText(ld.name); tvTip.setText(ld.tip); if (listItems.get(position) != null ){ imageLoader.DisplayImage(ld.photoUrl, image); } else{ image.setImageURI(Uri.fromFile(new File("//assets/eten.png"))); } // alternating colors int colorPos = position % bgColors.length; vi.setBackgroundResource(bgColors[colorPos]); } } return vi; } } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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