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POWeird performance issue with Galaxy Tab
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  1. POWeird performance issue with Galaxy Tab
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    copied!<p>I am working on a 2d tutorial and was able to test my current tutorial part on a Samsung Galaxy Tab.</p> <p>The tutorial simply moves the default icon randomly over the screen. With a tap I create a new moving icon. Everything works fine (constantly 60fps) on the Galaxy as long as I have 25 elements or less on the screen.</p> <p>With the 26th element the frame rate drops to 25fps.</p> <p>When I change the size/dimension of the image to a much bigger one, I reach less than 25fps before the 26th element. Thats ok. But at some not really reproducible number of elements the frame drops from (mostly more than) 10fps to 1fps.</p> <p>On my Nexus One I can add 150 elements and still have 50fps.</p> <p>What I have done: I changed the bitmap variable to a static one, so not every element has his own image but all use the same. That removed the behavior, but I doubt this solution is a good one. The magic number of 25 would suggest that I can use only 25 different images in that way.</p> <p>Does someone have any idea what can cause this behavior? Is it a bug in the modified android version of Samsung?</p> <p>My <a href="http://www.droidnova.com/blog/wp-content/uploads/2011/03/2d-tutorial-part5.zip" rel="noreferrer">sample eclipse project is available</a>. I would appreciate if some Samsung owner would check their performance with the sample.</p> <p><strong>edit</strong></p> <p>A colleague found a solution. He changed the way the bitmap is loaded from</p> <pre><code>mBitmap = BitmapFactory.decodeResource(res, R.drawable.icon); </code></pre> <p>to</p> <pre><code>mBitmap = BitmapFactory.decodeStream(new BufferedInputStream(res.openRawResource(R.drawable.icon))); </code></pre> <p>But we still don't really get it why it works this way...</p>
 

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