可以在Android中进行ajax调用吗？
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Can ajax call be done in Android?
提问by Sanal V
I'm developing an application in which I've got search option. In that search box, if I type 'a' I want all names of all my friends starting with a, which I'll get from web server. But for that I've to make request simultaneously with typing each letter. But when I googled, I got mixed reactions. Some people said Ajax call is not possible in Android. Basically Android is based on java. Then why is not possible to perform AJAX calls. Could anyone guide me to a good link related to AJAX call in Android if it is possible ?
我正在开发一个应用程序，其中有搜索选项。在那个搜索框中，如果我输入“a”，我希望我所有朋友的名字都以 a 开头，我将从 Web 服务器获取。但为此，我必须在输入每个字母的同时提出请求。但是当我用谷歌搜索时，我得到了不同的反应。有人说Ajax 调用在Android 中是不可能的。基本上Android是基于java的。那么为什么不能执行 AJAX 调用。如果可能的话，有人可以指导我找到与 Android 中的 AJAX 调用相关的良好链接吗？
回答by Phil
You can use droidQuery, which is The Android port of jQuery, and includes most of the features and syntax of jQuery, including Ajax. For example:
您可以使用droidQuery，这是jQuery的的的Android端口，包括大部分的功能和语法jQuery的，包括阿贾克斯。例如：
$.ajax(new AjaxOptions().url("http://www.example.com").type("GET").dataType("json").success(new Function() {
@Override
public void invoke($ d, Object... args) {
JSONObject json = (JSONObject) args[0];
//TODO handle json. If expecting a JSONArray, just cast args[0] to JSONArray.
}
}).error(new Function() {
@Override
public void invoke($ d, Object... args) {
AjaxError error = (AjaxError) args[0];
Toast.makeText(MyActivity.this, "Error (" + error.status + "): " + error.reason, Toast.LENGTH_LONG).show();
}
}));
回答by Anup Cowkur
Yes it is possible, but with a few conditions and restrictions.
是的，这是可能的，但有一些条件和限制。
Check out these resources for more info:
查看这些资源以获取更多信息：
Can you use AJAX calls with Android?
Android: Implication of using AsyncTask to make repeated Ajax Calls
Android：使用 AsyncTask 进行重复 Ajax 调用的含义
https://developer.android.com/guide/topics/search/search-dialog.html
https://developer.android.com/guide/topics/search/search-dialog.html
http://www.grokkingandroid.com/android-tutorial-adding-search-to-your-apps/
http://www.grokkingandroid.com/android-tutorial-adding-search-to-your-apps/
回答by mattboy
Closest I know is using an AutoCompleteTextView. You will need to make a custom adapter for it that makes calls to the web server whenever a user types anything and returns filter results based on that.
我所知道的最接近的是使用 AutoCompleteTextView。您需要为它制作一个自定义适配器，以便在用户键入任何内容时调用 Web 服务器并基于此返回过滤器结果。
回答by Raghu Nagaraju
Fetch names from the server on loading the screen, using asynctask. Then you can make use of AutoCompleteTextView or MultiAutoCompleteTextView to achieve your need.
在加载屏幕时使用 asynctask 从服务器获取名称。然后您可以使用 AutoCompleteTextView 或 MultiAutoCompleteTextView 来满足您的需求。
You specify already fetched names in the adapter. See more on AutoCompleteTextView
您在适配器中指定已提取的名称。查看更多关于AutoCompleteTextView
