play mp3

I try to play mp3 music file.
I create MediaPlayer class.

MediaPlayer mP = new MediaPlayer();

I set mp3 file.

mP.setDataSource("/sdcard/music/sample.mp3");

I call prepare() api and start() api.

mP.prepare();
mP.start();

prepare() and setDataSource() need try and catch.
source code is here.
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