import System.IO;
import System.Collections;
import System.Text;
var www : WWW;
var file:ArrayList;
var scrollPosition :Vector2= Vector2.zero;
var scrollVelocity:float  = 0f;
var timeTouchPhaseEnded:float  = 0f;
var inertiaDuration:float = 0.5f;
var lastDeltaPos:Vector2 ;
var skin:GUISkin;
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function Start () {
file=new ArrayList();
he("C:\\","*.mp3",file);
} 
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var play:Texture;
var pause:Texture;
var next:Texture;
var last:Texture;
var sound:Texture;
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function OnGUI(){
GUI.skin=skin;
var y:int=0;
scrollPosition = GUI.BeginScrollView( Rect(0, 0, Screen.width, Screen.height), scrollPosition,  Rect(0, 0,Screen.width, file.Count*60), false, false);
//Unity3D:www.unitymanual.com
for(var f:String in file){
//把系统编码转成utf-8，因为android上是utf-8
var utf:Encoding =Encoding.UTF8;//utf-8
var gb:Encoding =Encoding.Default;//系统的编码
var temp:byte[] = gb.GetBytes(f);
var temp1:byte[] = Encoding.Convert(gb, utf, temp);
var f1:String=utf.GetString(temp1);
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//用lastindexof和substring方法获取文件名（不包括路径）
var p:int=f1.LastIndexOf('\\',f1.Length-1); //必须是'\\'，如果是‘\’会报错的。如果是手机要写‘/’
var f2:String=f1.Substring(p+1,f1.Length-1-p);
var b=GUI.Button(Rect(0,y,Screen.width,60),"   "+f2);
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if(b){
www=new WWW("file://"+f);    //记住这里面的“//”别写成“\\”就行哈；
audio.clip=www.audioClip;
}
y+=60;
}
GUI.EndScrollView();
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}
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function Update (){
if(Input.touchCount > 0){
if(Input.GetTouch(0).phase == TouchPhase.Moved){
scrollPosition.y += Input.GetTouch(0).deltaPosition.y;
lastDeltaPos = Input.GetTouch(0).deltaPosition;
}
else if (Input.GetTouch(0).phase == TouchPhase.Ended){
print ("End:"+lastDeltaPos.y+"|"+Input.GetTouch(0).deltaTime);
if(Mathf.Abs(lastDeltaPos.y)> 20.0f){
scrollVelocity = lastDeltaPos.y * 0.5/ Input.GetTouch(0).deltaTime;
print(scrollVelocity);
}
timeTouchPhaseEnded = Time.time;
}
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}
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else{
if(scrollVelocity != 0.0f){
var t:float = (Time.time - timeTouchPhaseEnded)/inertiaDuration;
var frameVelocity:float = Mathf.Lerp(scrollVelocity, 0, t);
scrollPosition.y += frameVelocity * Time.deltaTime;
if (t >= inertiaDuration)
scrollVelocity = 0;
}
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}
if(Input.GetKey(KeyCode.Escape)){
Application.Quit();
}
if(!audio.isPlaying)
audio.Play();
}
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function he(path:String,pattern:String,al:ArrayList){
if(path!=null){
var f1:String[]=Directory.GetFiles(path,pattern);
var d1:String[];
for(var f11:String in f1){
al.Add(f11);
}
try{
d1=Directory.GetDirectories(path);
for(var d11:String in d1){
try{ he(d11,pattern,al);}
catch(Exception){}
}
}catch(Exception){}
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}
}
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Unity3D简单的音乐播放器【代码】