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POadapter's getView not called after notifyDatasetChanged
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  1. POadapter's getView not called after notifyDatasetChanged
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    copied!<p>Short Version: The number of datasets in my adapter grows (from initially 4) while loading data. <code>getView</code> is called normally for positions 0 through 3. After new data has arrived (<code>getCount</code> now returns 7), positions 4 trough 6 are queried. Instead I would like to update the first 4 items immediately. </p> <p><strong>My question - how can I make the <code>ListView</code> query <code>getView</code> again for positions 0 through 3 when <code>notifyDataSetChanged</code> is fired?</strong></p> <p>The cause of this behavior may be related to some animations I do with the items in the <code>ListView</code>. My approach is loosely based on <a href="http://graphics-geek.blogspot.ch/2013/06/devbytes-animating-listview-deletion.html" rel="nofollow noreferrer">Chet Haase's example</a> - a <code>DataSetObserver</code> also receives my adapter's <code>onDataSetChange</code> (in addition to the <code>ListView</code>) and launches the animation by adding an <code>onPreDrawListener</code> to the <code>ListView</code>'s <code>ViewTreeObserver</code>. The animation is done in <code>onPreDrawListener</code> (using <code>View.animate</code>) and takes between 300 and 600ms. If I outcomment the line initiating the animation, the behavior is just like I want. <code>getView</code> is called for positions 0, 1, 2, 3 and subsequently 0, 1, 2, 3, 4, 5, 6. </p> <p><img src="https://i.stack.imgur.com/8oWYP.png" alt="LogCat excerpt from illustrating my problem"></p> <p>The following screenshot (left) shows what the list looks like in this undesired state. Compare this with the logcat screenshot - the text on the views matches what comes after "View Text = " in logcat. On the right is what it settles to eventually after the ListView eventually decides to re-query getView for the positions 1-4.</p> <p><img src="https://i.stack.imgur.com/p3zcj.png" alt="screenshots"></p>
 

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