Android Base64代码如下：

// 加密传入的数据是byte类型的，并非使用decode方法将原始数据转二进制，String类型的数据 使用 str.getBytes()即可

String str = "Hello!";

// 在这里使用的是encode方式，返回的是byte类型加密数据，可使用new String转为String类型

String strBase64 = new String(Base64.encode(str.getBytes(), Base64.DEFAULT));

Log.i("Test", "encode >>>" + strBase64);

// 这里 encodeToString 则直接将返回String类型的加密数据

String enToStr = Base64.encodeToString(str.getBytes(), Base64.DEFAULT);

Log.i("Test", "encodeToString >>> " + enToStr);

// 对base64加密后的数据进行解密

Log.i("Test", "decode >>>" + new String(Base64.decode(strBase64.getBytes(), Base64.DEFAULT)));

Android AES代码如下：

/**

* @param

* @return AES加密算法加密

* @throws Exception

*/

public static String encrypt(String seed, String cleartext)

throws Exception {

byte[] rawKey = getRawKey(seed.getBytes());

byte[] result = encrypt(rawKey, cleartext.getBytes());

return toHex(result);

}

/**

* @param

* @return AES加密算法加密

* @throws Exception

*/

private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {

SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

byte[] encrypted = cipher.doFinal(clear);

return encrypted;

}

private static String toHex(byte[] buf) {

final String HEX = "0123456789ABCDEF";

if (buf == null)

return "";

StringBuffer result = new StringBuffer(2 * buf.length);

for (int i = 0; i < buf.length; i++) {

result.append(HEX.charAt((buf[i] >> 4) & 0x0f)).append(

HEX.charAt(buf[i] & 0x0f));

}

return result.toString();

}

/**

* @param raw

* @param encrypted

* @return AES加密算法解密

* @throws Exception

*/

public static String decrypt(String seed, String encrypted)

throws Exception {

byte[] rawKey = getRawKey(seed.getBytes());

byte[] enc = toByte(encrypted);

byte[] result = decrypt(rawKey, enc);

return new String(result);

}

private static byte[] decrypt(byte[] raw, byte[] encrypted)

throws Exception {

SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");

cipher.init(Cipher.DECRYPT_MODE, skeySpec);

byte[] decrypted = cipher.doFinal(encrypted);

return decrypted;

}

private static byte[] toByte(String hexString) {

int len = hexString.length() / 2;

byte[] result = new byte[len];

for (int i = 0; i < len; i++)

result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2),

16).byteValue();

return result;

}

private static byte[] getRawKey(byte[] seed) throws Exception {

KeyGenerator kgen = KeyGenerator.getInstance("AES");

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");

sr.setSeed(seed);

kgen.init(128, sr); // 192 and 256 bits may not be available

SecretKey skey = kgen.generateKey();

byte[] raw = skey.getEncoded();

return raw;

}

// 使用该方法

String masterPassword = "test";

String originalText = "0123456789";

String encryptingCode = SimpleCrypto.encrypt(masterPassword,originalText);

Log.i("加密结果为 ",encryptingCode);

String decryptingCode = SimpleCrypto.decrypt(masterPassword, encryptingCode);

Log.i("解密结果",decryptingCode);