save the screenshot taken in game into android device's memory

Please I need help with this i have been able to take a screenshot i just need to save it into a folder of the android device(gallery documents..anyone).I have researched this but can't seem to find a working solution.Would really appreciate any help i can get with this. My current code is pasted below

 import System.IO;
 var explosion:GameObject[];
 var dec:GUITexture;
 var levelToLoad:String;
 // increment our filename
 private var count:int = 0;
 
 /**
 * Test key
 */
 function Update()
 {
     
 }
 
 
 
  //Take the screen buffer and spit out a JPG
 
 function ScreenshotEncode()
 {
     // wait for graphics to render
     yield WaitForEndOfFrame();
     
     // create a texture to pass to encoding
     var texture:Texture2D = new Texture2D (Screen.width, Screen.height, TextureFormat.RGB24, false);
     
     // put buffer into texture
     texture.ReadPixels(Rect(0.0, 0.0, Screen.width, Screen.height), 0.0, 0.0);
     texture.Apply();
 
     // split the process up--ReadPixels() and the GetPixels() call inside of the encoder are both pretty heavy
     yield;
     
     // create our encoder for this texture
     var encoder:JPGEncoder = new JPGEncoder(texture, 75.0);
     
     // encoder is threaded; wait for it to finish
     while(!encoder.isDone)
         yield;
     
     // save our test image (could also upload to WWW)
     File.WriteAllBytes(Application.persistentDataPath + "/../MyTree-" + count + ".jpg", encoder.GetBytes());
     yield WaitForSeconds(1);
     //play sound here
     //System.Diagnostics.Process.Start("mspaint.exe","MyTree-" + count + ".jpg");
     count++;
 guiTexture.enabled=true;
 dec.guiTexture.enabled=true;;
 Application.LoadLevel(levelToLoad);    
 }
 function OnMouseDown(){
 Destroy(GameObject.FindWithTag("chickens"));
 Destroy(GameObject.FindWithTag("pal"));
 guiTexture.enabled=false;
 dec.guiTexture.enabled=false;
 Instantiate(explosion[Random.Range(0,explosion.Length)]);;
 yield WaitForSeconds(2);
 ScreenshotEncode();
         }