未使用QAndroidJniObject调用的三个函数之一

Question

下面是从我的自定义java类中调用三个函数的代码：

QAndroidJniObject datafile = QAndroidJniObject::fromString(path);
QAndroidJniObject password = QAndroidJniObject::fromString("asimpletest");

QAndroidJniObject::callStaticObjectMethod("org/qcolocrypt/AESCrypt",
                                          "AESCryptInit",
                                          "(Ljava/lang/String;Ljava/lang/String;)V;",
                                          password.object<jstring>(),
                                          datafile.object<jstring>());


QAndroidJniObject decrypted_data = QAndroidJniObject::callStaticObjectMethod("org/qcolocrypt/AESCrypt",
                                                                             "decrypt",
                                                                             "()Ljava/lang/String;");


QAndroidJniObject fname = QAndroidJniObject::callStaticObjectMethod("org/qcolocrypt/AESCrypt",
                                                                   "getFilename",
                                                                   "()Ljava/lang/String;");

QAndroidJniObject status = QAndroidJniObject::callStaticObjectMethod("org/qcolocrypt/AESCrypt",
                                                                   "getStatus",
                                                                   "()Ljava/lang/String;");

下面是其中三个函数的java代码：

不工作的那个：

public static void AESCryptInit (String passwd, String datafile){

    // Initializing variables.
    rawdata = null;
    status = "";
    fileName = datafile;

    Log.i("[QCOLOCRYPT]","The filename is " + datafile);

    // Transforming the passwd to 16 bytes.
    try {
        MessageDigest digester = MessageDigest.getInstance("MD5");
        InputStream in = new ByteArrayInputStream(Charset.forName(encoding).encode(passwd).array());
        byte[] buffer = new byte[NCHARS];
        int byteCount;
        while ((byteCount = in.read(buffer)) > 0) {
            digester.update(buffer, 0, byteCount);
        }
        keyBytes = digester.digest();
    }
    catch(Exception e){
        status = "Error in key generation: " + e.toString();
    }

    // Initilizing the crypto engine
    try {
        cipher = Cipher.getInstance(algorithm);
    }
    catch(Exception e){
        status = "Error in intialization: " + e.toString();
    }
    secretKeySpec = new SecretKeySpec(keyBytes, "AES");
    ivParameterSpec = new IvParameterSpec(keyBytes);

}

和两个可以工作的

// Getting status
public static String getStatus(){return status;}

public static String getFilename() {
   Log.i("[QCOLOCRYPT]","Getting the file name");
   return "The Filename is: " + fileName;
}

没有调用非工作函数，因为它的调试消息没有被打印出来，而我得到的是日志消息和其他两个函数的返回值。Logcat似乎没有显示任何错误，所以我很困惑。我说错了吗？