Updated 20160811 - Download it here http://mimirsoft.com/wp-content/uploads/2011/06/Tutorial7.zip
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http://www.mimirsoft.com In this video, we introduce the ViewHolder class, and why we like it. The ViewHolder class is used in conjunction with an ArrayAdapter, to cache the results of all findViewById calls. This speeds up our lists by up to 30 percent when we start dealing with very large lists.
Watch the first 15 minutes of this http://www.youtube.com/watch?v=N6YdwzAvwOA