IMService.java

    // ini adalah proses penyimpanan ke database.
    public String sendMessage(String  username, String  tousername, String message, String mkey) throws UnsupportedEncodingException
    {
        String params = "username="+ URLEncoder.encode(this.username,"UTF-8") +
                        "&password="+ URLEncoder.encode(this.password,"UTF-8") +
                        "&to=" + URLEncoder.encode(tousername,"UTF-8") +
                        "&message="+ URLEncoder.encode(message,"UTF-8") + // save message
                        "&mkey="+ URLEncoder.encode(mkey, "UTF-8") + //must be save the key but didn't work
                        "&action="  + URLEncoder.encode("sendMessage","UTF-8")+
                        "&";
        Log.i("PARAMS", params);
        return socketOperator.sendHttpRequest(params);
    }