Trick to supply resources to different drawable folders
<p>Everytime, when I supply resource to drawable folder, here is what I did</p>

<pre><code>drawable-xhdpi (96x96 px)
drawable-hdpi  (72x72 px)
drawable-mdpi  (48x48 px)
drawable-ldpi  (36x36 px)
</code></pre>

<p>Most of the time, I merely use GIMP to perform dummy scale down from the largest size image from <code>drawable-xhdpi</code>. I do not perform any further pixel editing on the scaled down image.</p>

<p>Recently, I realize, if I only supply 1 highest resolution image, <strong>Android system will internally perform image size scale down.</strong></p>

<pre><code>drawable-xhdpi (96x96 px)
drawable-hdpi  (empty)
drawable-mdpi  (empty)
drawable-ldpi  (empty)
</code></pre>

<p>I tested on 2 devices. It works for me. I was wondering is this a good technique to avoid cumbersome work to supply so many different size images? Any side effect on this technique?</p>
