android RSA公钥加密 公钥解密，解决乱码问题

/**
 * 

 * 公钥解密
 * 

 *
 * @param encryptedData 已加密数据
 * @param  publicKey  公钥 （无需base64编码，靠，网上的代码为毛说要base64编码，坑啊哥哥们）
 * @return  （已解决解密乱码问题）
 * @throws Exception
 */
public static byte[] decryptByPublicKey(byte[] encryptedData，String publicKey )
        throws Exception {
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicK = keyFactory.generatePublic(x509KeySpec);
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.DECRYPT_MODE, publicK);
    int inputLen = encryptedData.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // 对数据分段解密
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
            cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_DECRYPT_BLOCK;
    }
    byte[] decryptedData = out.toByteArray();
    out.close();
    return decryptedData;
}

/**
 * 

 * 公钥加密
 * 

 *
 * @param data      源数据
 * @param
 * @return
 * @throws Exception
 */
public static byte[] encryptByPublicKey(byte[] data，String publicKey)
        throws Exception {
    byte[] keyBytes = Base64.decode(publicKey, Base64.DEFAULT);
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicK = keyFactory.generatePublic(x509KeySpec);
    // 对数据加密
    Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding");
    cipher.init(Cipher.ENCRYPT_MODE, publicK);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // 对数据分段加密
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
            cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(data, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_ENCRYPT_BLOCK;
    }
    byte[] encryptedData = out.toByteArray();
    out.close();
    return encryptedData;
}

注：本方法中base64为util包下  

 android.util.Base64;

另外：方法中公钥 为"ASDFG"这种  ，网上有好多公钥前后有---BIGIN   END—— 这种，在本文中并不适用。

本人菜鸟，不知道问什么，求告知