Using icons from system versus copying them into your project
<p>For common Android icons (such as context menu icons) I typically copy the standard Android icons into my project. I realized recently that you can also get those icons from the system using <code>android.R.drawable.blablabla</code>. So my question is, is there any reason to prefer one approach over the other?</p>

<p>And if using the system ones is better, how do you access them in XML?</p>

<p>Thanks!</p>
