v1.7

1. Implement writeToFile function.
   1-1 spawn a thread for downloading.
   1-2 add new function in event listener, it will execute when downloading is finished or failed.
2. Modify play functions, it will return boolean value.
   true: play success
   false: play failed.

v1.6

The second of countdown timer is replaced by a constant variable.

v1.5

1. Fix the issue which would return the duration time when song was at the end.
   2.Fix an issue which would cause the wrong current time when the music player was playing.

v1.4

release note:

1. Change event listener.
2. Remove todo functions in the event listener, these would cause exception when the timeline was changed.

version 1.3

release update

1. add an event listener for catching events from music player.
2. add an interface for developers.
3. add new APIs:
   3-1. writeToFile: save the music to your local storage.
   3-2. setEventListener: developers can implement what they want to do when catching the event of music player.

v1.2

v1.2

v1.1

first release of music player for playing remote music and local file.