actionbar nullpointer exception
<p>I am new to android. My minimum API level needs to be 7, so that I can test the app on my htc hero. My target API level is 17. 
The error concerns the actionbar. Some code is added by eclipse and I guess I need it to propperly run my app on the latest android versions:</p>

<pre><code>getActionBar().setDisplayHomeAsUpEnabled(true);
</code></pre>

<p><code>getActionBar()</code> gives NPE on API 7, but not on API 17. How do I solve this without deleting the code (which I will presumably need for modern API levels)?</p>
