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    <p>ListView is a tricky beast.</p> <p>Your second question first: you're seeing duplicates because ListView re-uses Views via convertView, but you're not making sure to reset all aspects of the converted view. Make sure that the code path for <code>convertView!=null</code> properly sets all of the data for the view, and everything should work properly.</p> <p>You'll want your <code>getView()</code> method to look roughly like the following if you're using custom views:</p> <pre><code>@Override public View getView(int position, View convertView, ViewGroup parent) { final MyCustomView v = convertView!=null ? (MyCustomView)convertView : new MyCustomView(); v.setMyData( listAdapter.get(position) ); return v; } </code></pre> <p>If you're not using your own custom view, just replace the call to <code>new MyCustomView()</code> with a call to <code>inflater.inflate(R.layout.my_layout,null)</code></p> <p>As to your first question, you'll want to watch Romain's techtalk on ListView performance here: <a href="http://code.google.com/events/io/sessions/TurboChargeUiAndroidFast.html" rel="noreferrer">http://code.google.com/events/io/sessions/TurboChargeUiAndroidFast.html</a></p> <p>From his talk and in order of importance from my own experience,</p> <ul> <li>Use convertView</li> <li>If you have images, don't scale your images on the fly. Use Bitmap.createScaledBitmap to create a scaled bitmap and put that into your views</li> <li>Use a ViewHolder so you don't have to call a bunch of findViewByIds() every time</li> <li>Decrease the complexity of the views in your listview. The fewer subviews, the better. RelativeLayout is much better at this than, say, LinearLayout. And make sure to use if you're implementing custom views.</li> </ul>
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    1. POHow to load the Listview "smoothly" in android
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    1. COSorry, but I use newView(), bindView() to display data. is it the same problem?
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    2. COI think I find something helpful with the video, thanks for share!
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Guidance
A row detail

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.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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