How to play mp3 with QMediaPlayer on Android?

[Lori]

I tried to use QMediaPlayer to play mp3 on Android but failed. I also built and depolyed the player example (Qt5.1.1\5.1.1\Src\qtmultimedia\examples\multimediawidgets\player) on an Android Pad, the same problem occurred.
The "document":http://qt-project.org/doc/qt-5.1/qtmultimedia/audiooverview.html says "compressed audio formats supported does depend on the operating system environment, and also what media plugins the user may have installed".
How can I sovle this problem? Thanks!