Samsung Galaxy S3 : How to Solve Can't Control Music Player on Lock Screen

A visitor of the inside-galaxy asked me through her comment that she could not control the stock music player app --such as skip, pause/play, rewind, etc-- when the phone is locked unless she's unlocked her phone. Well , if you're also experiencing the same problem with her, then better you check a few things below to solve the problem:

1. Use Swipe method to unlock the screen
With the basic