Question

我正在学习基于JAVA的Android应用和谷歌应用引擎。（我实际上正在使用留言板示例“

我正在尝试构建Android应用，它可以在谷歌应用引擎的简单网页上发布简单的消息。

例如，我只是运行Android应用程序，然后它会自动在谷歌引擎上的网页上发布问候消息。

首先，在服务端“google app engine”。我有一个doPost函数，比如..

 public void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws IOException {
    UserService userService = UserServiceFactory.getUserService();
    User user = userService.getCurrentUser();

    // We have one entity group per Guestbook with all Greetings residing
    // in the same entity group as the Guestbook to which they belong.
    // This lets us run a transactional ancestor query to retrieve all
    // Greetings for a given Guestbook.  However, the write rate to each
    // Guestbook should be limited to ~1/second.
    String guestbookName = req.getParameter("guestbookName");
    Key guestbookKey = KeyFactory.createKey("Guestbook", guestbookName);
    String content = req.getParameter("content");
    Date date = new Date();
    Entity greeting = new Entity("Greeting", guestbookKey);
    greeting.setProperty("user", user);
    greeting.setProperty("date", date);
    greeting.setProperty("content", content);

    DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
    datastore.put(greeting);

    resp.sendRedirect("/guestbook.jsp?guestbookName=" + guestbookName);
}

我目前不关心用户和日期。我只想通过andriod app更新内容。

其次，在html页面上我有..

 <form action="/sign" method="post">
  <div><textarea name="content" rows="3" cols="60"></textarea></div>
  <div><input type="submit" value="Post Greeting" /></div>
  <input type="hidden" name="guestbookName" value="default"/>
</form>

第三，我在网页上构建了Android应用程序的更新数据

            DefaultHttpClient httpclient = new DefaultHttpClient();
        try {

            HttpPost httpost = new HttpPost("http://example.appspot.com/");

            List <NameValuePair> nvps = new ArrayList <NameValuePair>();
            nvps.add(new BasicNameValuePair("content", "Helloasdas"));
            httpost.setEntity(new UrlEncodedFormEntity(nvps));

            new Timer();
            Timer.reset();
            Timer.start();
            response = httpclient.execute(httpost);
            entity = response.getEntity();


            Timer.stop();
            entity.consumeContent();

}

但是，我不确定为什么不在“http://example.appspot.com/”上发布meessage。

我是否错过了doPost或andriod部分的一部分？

通过Android应用在谷歌应用引擎上发布简单的消息

0 个答案: