Solve bugs in android music player source code and add homescreen widget

Make modification in already built android music player. The music player is having some bugs like: 1. songs are sorted album wise...I want it in alphabetical order.. 2. Playlist track selection through checkbox not working and when tracks touched multiple times it is added multiple times. 3. Deletion of tracks from playlist results in deletion of tracks from storage. I just want the tracks to be deleted only from playlist. 4. It continues to play when on call...i want it to pause. 5. Music player when minimized and resumed after change of song...the view is not refreshed automatically until user clicks next button. 6. Nothing happens when music player notification is touched in notification bar. I want notification click to open the app. 7. Add a widget to homescreen having play,pause,next,previous button displaying showing song and artist details.