Difference(s): android:src and tools:src? : <blockquote>
  <p><strong>Difference(s): <code>android:src</code> and <code>tools:src</code>?</strong></p>
</blockquote>

<p>If any, when is it considered proper to use <code>tools:src</code> over <code>android:src</code>?</p>
