Here you can find the source of decryptBase64(String encryptBase64)
public static byte[] decryptBase64(String encryptBase64) throws Throwable
//package com.java2s; import javax.crypto.Cipher; import android.util.Base64; public class Main { private static Cipher decryptCipher; public static byte[] decryptBase64(String encryptBase64) throws Throwable { if (encryptBase64 == null || encryptBase64.trim().length() < 1) { return null; }//from w ww .j a va2 s . c o m byte[] encryptData = Base64.decode(encryptBase64, Base64.NO_WRAP); return decryptCipher.doFinal(encryptData); } }