Listening to outgoing/incoming calls
<p>I'm a newbie android developer, I'm trying to develop an application; a background service which listens to incoming/outgoing calls/messages. I want to learn how to:</p>

<ul>
<li>I want to end the phone calls from specific numbers</li>
<li>Delete the messages from Inbox/drafts/sent items </li>
</ul>

<p>May I get some leads to achieve this?</p>
