将 JSON 数据从服务发送到 Android 中的 UI

要求是：我有一个后台服务，在该服务中我正在执行 REST 调用来获取 JSON 数据。我想将 JSON 数据发送到 UI 并更新内容。

我可以使用的一种方法是将整个 JSON 字符串存储在 SharedPreferences 中并在 UI 中检索，但我认为这效率不高。

大家有什么想法吗？我在 UI 中添加了一个处理程序来更新元素，但我不太熟悉它的使用。

示例 REST 调用代码：

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(DATA_URL);

httpPost.setHeader("Content-Type", "application/json");

//passes the results to a string builder/entity
StringEntity se = null;
try {
    se = new StringEntity(RequestJSON.toString());
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
}

//sets the post request as the resulting string
httpPost.setEntity(se);

//Handles what is returned from the page
ResponseHandler responseHandler = new BasicResponseHandler();

try {
    HttpResponse response = (HttpResponse) httpClient.execute(httpPost, responseHandler);

    // response will have JSON data that I need to update in UI

    //Show notification
    showNotification("Update Complete");



} catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} finally {
    // httpClient = null;
}

关于 UI 活动

Handler myHandler = new Handler() {



            @Override
            public void handleMessage(Message msg) {

                Bundle Recevied = msg.getData();
                String resp = Recevied.getString("Mkey");

            }
    };

    messenger = new Messenger(myHandler);


}

将信使传递给服务，一旦结果准备好：

Message msg = Message.obtain();

Bundle data = new Bundle();
data.putString("Mkey",
        Smsg);
msg.setData(data);


try {
    // Send the Message back to the client Activity.
    messenger.send(msg);
} catch (RemoteException e) {
    e.printStackTrace();
}