的Android - 加密

增長速度，我不知道這是可能的...我有我的應用程序，加密圖像中的代碼...的Android - 加密

Cipher cipher; 
SecretKey key; 
byte[] buf = new byte[1024]; 
DesEncrypter() { 
    byte[] iv = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 
     0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 }; 
    key = new SecretKeySpec(iv, "AES"); 
    try { 
    cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC"); 
    cipher.init(Cipher.ENCRYPT_MODE, key);   
    } 
    catch (NoSuchProviderException e) {} 
}   

public void encrypt(InputStream in, OutputStream out) { 
    try { 
     out = new CipherOutputStream(out, cipher); 
     int numRead = 0; 
     while ((numRead = in.read(buf)) >= 0) { 
      out.write(buf, 0, numRead); 
     } 
     out.close(); 
    }

我每次加密或解密的圖像（這我應用程序確實需要很長時間，有關如何增加過程的任何提示，以便用戶有更好的體驗？

來源

2011-02-15 Beginner