// C# Example

    // Builds an asset bundle from the selected objects in the project view.

    // Once compiled go to "Menu" -> "Assets" and select one of the choices

    // to build the Asset Bundle 

    using UnityEngine;

    using UnityEditor;

    using System.IO;

    public class ExportAssetBundles {

        [MenuItem("Assets/Build AssetBundle Binary file From Selection - Track dependencies ")]

        static void ExportResource () {

            // Bring up save panel

            string path = EditorUtility.SaveFilePanel ("Save Resource", "", "New Resource", "unity3d");

            if (path.Length != ) {

                // Build the resource file from the active selection.

                Object[] selection = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);

                BuildPipeline.BuildAssetBundle(Selection.activeObject, selection, path, BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets);

                Selection.objects = selection; 

                FileStream fs = new FileStream(path,FileMode.Open,FileAccess.ReadWrite);

                byte[] buff = new byte[fs.Length+];

                fs.Read(buff,,(int)fs.Length);

                buff[buff.Length-] = ;

                fs.Close();

                File.Delete(path); 

                string BinPath = path.Substring(,path.LastIndexOf('.'))+".bytes";

 //             FileStream cfs = new FileStream(BinPath,FileMode.Create);

                cfs.Write(buff,,buff.Length);

                buff =null;

                cfs.Close(); 

//              string AssetsPath = BinPath.Substring(BinPath.IndexOf("Assets"));

//              Object ta = AssetDatabase.LoadAssetAtPath(AssetsPath,typeof(Object));

//              BuildPipeline.BuildAssetBundle(ta, null, path);

            }

        }

        [MenuItem("Assets/Build AssetBundle From Selection - No dependency tracking")]

        static void ExportResourceNoTrack () {

            // Bring up save panel

            string path = EditorUtility.SaveFilePanel ("Save Resource", "", "New Resource", "unity3d");

            if (path.Length != ) {

                // Build the resource file from the active selection.

                BuildPipeline.BuildAssetBundle(Selection.activeObject, Selection.objects, path);

            }

        } 

    } 

using UnityEngine;

using System.Collections;

using System;

public class WWWLoadTest : MonoBehaviour

{

    public string BundleURL;

    public string AssetName;

    IEnumerator Start()

    {

          WWW www =WWW.LoadFromCacheOrDownload(BundleURL,);

        yield return www;

        TextAsset txt = www.assetBundle.Load("characters",typeof(TextAsset)) as TextAsset;

        byte[]  data = txt.bytes;

        byte[] decryptedData = Decryption(data);

        Debug.LogError("decryptedData length:"+decryptedData.Length);

        StartCoroutine(LoadBundle(decryptedData));

    }

    IEnumerator LoadBundle(byte[] decryptedData){

        AssetBundleCreateRequest acr = AssetBundle.CreateFromMemory(decryptedData);

        yield return acr;

        AssetBundle bundle = acr.assetBundle;

        Instantiate(bundle.Load(AssetName));

    }

    byte[] Decryption(byte[] data){

        byte[] tmp = new byte[data.Length-];

        for(int i=;i<data.Length-;i++){

            tmp[i] = data[i];

        }

        return tmp;

    }

}