lock application with a lock a pattern
<p>How can I make an activity which comes as a splash screen before the app starts and waits for a specific time like 3 seconds in which the user have to draw the unlocking pattern to get in to the application?</p>

<p>If the user is unable to draw the right pattern, the application should open a simple web browser or another activity which is not the part of the application.</p>

<p>Also, after putting in the correct locking pattern, how can a user change the locking pattern so that he can use the new pattern next time he uses the application?</p>
