android MediaPlayer class network playback of songs, MP3 links on Baidu often can not play, and why?

In networks with MediaPlayer class to play a song, the use Baidu's MP3 links, such as http://zhangmenshiting2.baidu.com/data2/music/13915002/13915002.mp3?xcode=2c73a52a316ed536e084a56ea0ee27f0&mid=0.85993393122818
Start Shihai can play, but after a while you can not play, and will be an exception when Prepared! I use links to other sites, such as QQ, Sogou, etc., can play well. Very confused, do not understand why? Please Which expert guidance! Thank you!<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
This is encrypted MP3 link URL, it will fail.
Reply:
So why could start sowing, one will die! ?

cited a floor reply:

the MP3 link URL is encrypted, it will fail.

Reply:
Khan, I ask you not come across Login Forum after a while some time to re-login? This principle is the same.
Reply:
Take your hair that URL, you are already on your computer can no longer open the site.
Reply:
Ah, is indeed the case, then how do the time if you want to refer to this URL corresponding song it? Please advise, thank you!

references, 4th Floor reply:

Take your hair that URL, you are already on your computer can no longer open the site.

Reply:

references, 4th Floor reply:

Take your hair that URL, you are already on your computer can no longer open the site.

is indeed the case, just do not know how to get?
Reply:
session expired