我需要使用 Volley 库获取 rss 提要，但 Volley 一直忽略我的 format=feed&type=rss 参数。
我尝试了所有方法，但无法正常工作。
这是我的网址:http://almesryoon.com/%D8%AF%D9%81%D8%AA%D8%B1-%D8%A3%D8%AD%D9%88%D8%A7% D9%84-%D8%A7%D9%84%D9%88%D8%B7%D9%86?format=feed&type=rss
注意:此网址适用于 Google PostMan
我的 SimpleXmlRequest 类:

public class SimpleXmlRequest<T> extends Request<T> {

    private static final Serializer serializer = new Persister();
    private final Class<T> clazz;
    private final Map<String, String> headers;
    private final Listener<T> listener;


    /**
     * Make HTTP request and return a parsed object from Response
     * Invokes the other constructor.
     *
     * @see SimpleXmlRequest#SimpleXmlRequest(int, String, Class, Map, Listener, ErrorListener)
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz,
                            Listener<T> listener, ErrorListener errorListener) {
        this(method, url, clazz, null, listener, errorListener);
    }


    /**
     * Make HTTP request and return a parsed object from XML Response
     *
     * @param url URL of the request to make
     * @param clazz Relevant class object
     * @param headers Map of request headers
     * @param listener
     * @param errorListener
     *
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
                            Listener<T> listener, ErrorListener errorListener) {
        super(method, url, errorListener);
        this.clazz = clazz;
        this.headers = headers;
        this.listener = listener;
    }


    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        return headers != null ? headers : super.getHeaders();
    }


    @Override
    protected void deliverResponse(T response) {
        listener.onResponse(response);
    }

    @Override
    public String getBodyContentType() {
        return "application/xml";
    }

    @Override
    protected Response<T> parseNetworkResponse(NetworkResponse response)
    {
        try {

            String data = new String(response.data, HttpHeaderParser.parseCharset(response.headers));// The problem here this data is not XML

            return Response.success(serializer.read(clazz, data),
                    HttpHeaderParser.parseCacheHeaders(response));
        }
        catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        }
        catch (Exception e) {
            return Response.error(new VolleyError(e.getMessage()));
        }
    }
}

我还尝试使用 METHOD.POST 和 getParams() 方法
目标 rss:

<?xml version="1.0" encoding="utf-8"?>
<!-- generator="Joomla! - Open Source Content Management" -->
<rss version="2.0" 
    xmlns:atom="http://www.w3.org/2005/Atom">
    <channel>
        <title>Title</title>
        <description>Description</description>
        <link>http://google.com</link>
        <lastBuildDate>Thu, 31 Mar 2016 01:27:12 +0200</lastBuildDate>
        <generator>Joomla! - Open Source Content Management</generator>
        <atom:link rel="self" type="application/rss+xml" href="http://example.com/example?format=feed&amp;type=rss"/>
        <language>ar-aa</language>
        <item>
            <title>Item1</title>
            <link>http://example.com/example1</link>
            <guid isPermaLink="true">http://example.com/example1</guid>
            <description>Description1</description>
            <author>admin</author>
            <category>Category1</category>
            <pubDate>Wed, 30 Mar 2016 18:49:37 +0200</pubDate>
        </item>
        <item>
            <title>Item2</title>
            <link>http://example.com/example2</link>
            <guid isPermaLink="true">http://example.com/example2</guid>
            <description>Description2</description>
            <author>admin</author>
            <category>Category1</category>
            <pubDate>Wed, 30 Mar 2016 18:49:37 +0200</pubDate>
        </item>
    </channel>
</rss>

我正在使用这段代码，它运行良好，但是 HttpParams、BasicHttpParams、HttpConnectionParams、DefaultHttpClient、 HttpGet、HttpResponse 和 HttpEntity 现在已弃用。
我的工作代码:

StringBuilder chaine = new StringBuilder("");

        try {

            HttpParams httpParameters = new BasicHttpParams();
            // Set the timeout in milliseconds until a connection is established.
            // The default value is zero, that means the timeout is not used.
            int timeoutConnection = AppConstants.CONNECTION_TIMEOUT_SEC * 1000;
            HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
            // Set the default socket timeout (SO_TIMEOUT)
            // in milliseconds which is the timeout for waiting for data.
            int timeoutSocket = AppConstants.SOCKET_TIMEOUT_SEC * 1000;
            HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

            // request method is GET
            DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpGet httpGet = new HttpGet(url);

            HttpResponse httpResponse = httpClient.execute(httpGet);
            HttpEntity httpEntity = httpResponse.getEntity();

            InputStream inputStream = httpEntity.getContent();

            BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));

            String line;

            while ((line = rd.readLine()) != null) {

                chaine.append(line);

            }

            rd.close();

        } catch (IOException e) {
            // writing exception to log
            e.printStackTrace();
        }

最佳答案

请使用以下网址获取您需要的 RSS

https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?format=feed&type=rss&template=mobile

这是日志:

...
D/dalvikvm: GC_FOR_ALLOC freed 27K, 12% free 6432K/7303K, paused 20ms, total 20ms
I/onResponse: <?xml version="1.0" encoding="utf-8"?>
              <!-- generator="Joomla! - Open Source Content Management" -->
              <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
                <channel>
                    <title>دفتر أحوال الوطن - المصريون</title>
                    <description>المصريون صحيفة يومية مستقلة تنشر آخر وأهم أخبار مصر والوطن العربى والعالم</description>
                    <link>https://m.almesryoon.com/دفتر-أحوال-الوطن</link>
                    <lastBuildDate>Thu, 23 Feb 2017 04:36:51 +0200</lastBuildDate>
                    <generator>Joomla! - Open Source Content Management</generator>
                    <atom:link rel="self" type="application/rss+xml" href="https://m.almesryoon.com/دفتر-أحوال-الوطن?format=feed&amp;type=rss&amp;template=mobile"/>
                    <language>ar-aa</language>
                    <item>
                    ...

在用你的服务器 url 测试了一些示例代码后，我发现它得到了 301 响应。从您的第一个网址，第二个网址将是 (https)

https://almesryoon.com/%D8%AF%D9%81%D8%AA%D8%B1-%D8%A3%D8%AD%D9%88%D8%A7%D9%84-%D8%A7%D9%84%D9%88%D8%B7%D9%86?format=feed&type=rss

第三个网址将是:

http://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile

最终的 url 将是 (https):

https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile

使用此最终 URL 和下面的示例代码，您将获得 200 响应代码。我认为您可以使用我上面提到的最终 URL 来尝试您的代码。

RequestQueue queue = Volley.newRequestQueue(this);
String url = "https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile";
StringRequest request = new StringRequest(url, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        Log.i("onResponse", response);
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Log.e("onErrorResponse", error.toString());
    }
});

queue.add(request); 

关于在Volley中处理301响应，我没有尝试过，但是，您可以阅读以下问题以获取更多信息

Android volley to handle redirect

关于android - Volley 库忽略 format=feed&type=rss 参数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36319630/