/** 
   * 对post请求数据进行加密 
   * @param params 
   * @return 
   * @throws Throwable 
   */
public static byte[] encryptParams(HashMap<String, String> params) throws Throwable{
 if (params == null){
  return null;
 }
 StringBuilder stringBuilder = new StringBuilder();
 Iterator<Map.Entry<String, String>> iterator = params.entrySet().iterator();
 while (iterator.hasNext()){
  Map.Entry<String,String> entry = iterator.next();
  String key = entry.getKey();
  String value = entry.getValue();
  if (stringBuilder.length() > 0){
   stringBuilder.append("&");
  }
  stringBuilder.append(key).append("=").append(Uri.encode(value));
 }
 byte[] buff = stringBuilder.toString().getBytes("utf-8");
 byte[] iv = new byte[16];
 Random random = new Random();
 random.nextBytes(iv);
 byte[] data = Aes.encrypt(buff,PASSWORD,iv);
 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 baos.write(iv,0,iv.length);
 baos.write(data,0,data.length);
 byte[] out = baos.toByteArray();
 try {
  baos.close();
 }
 catch (Throwable e){
  e.printStackTrace();
 }
 return out;
}

将  
android.util.Base64.encodeToString(input, Base64.DEFAULT) 
换成 
android.util.Base64.encodeToString(input, Base64.NO_WRAP); 

// 加密： 
byte[] bodyBytes = RequestManager.encryptParams(hashMap); 
// 使用base64encode做最后的加密 
String result = new BASE64Encoder().encode(bodyBytes); 
String ans_url = headUrl + result.replaceAll("\n","");