Implement (or use) a lock screen
<p>Is there a way I can use the android default lock screen (SDK)? OR should I implement my own? If I implement my own Any pointers how to do that?</p>

<p>I basically want to unlock the screen using the keypad and If I use certain pattern then I can receive calls from X only and if I use a different pattern then I can receive calls from Y only (X and Y being certian contact).</p>

<p>Please help me .. I need hint and I can take it from there
Thanks</p>
