Android Volley Post Request标题不变

概述我正在使用AndroidVolley库发送POST请求.并为POST请求>标题是Content-Type：application/json>PostBody是JsonString但无论如何,我都要更改VolleyRequestHeader,它总是设置为Content-Type：text/html.这给了我400BadRequest.这是我在Volley上做POST请求的课程publicc

我正在使用Android Volley库发送POST请求.并为POST请求

>标题是Content-Type：application / Json
> Post Body是Json String

但无论如何,我都要更改Volley Request header,它总是设置为Content-Type：text / HTML.这给了我400 Bad Request.这是我在Volley上做POST请求的课程

public class GsonRequest<T> extends Request<T> {private final Class<T> clazz;private final Map<String, String> headers;private final Listener<T> Listener;private Map<String, String> postParams;private String poststring = null;/** * Make a GET request and return a parsed object from JsON. *  * @param url *            URL of the request to make * @param clazz *            Relevant class object, for Gson's reflection * @param headers *            Map of request headers */public GsonRequest(int method, String url, Class<T> clazz,        Map<String, String> headers, Map<String, Object> params,        Listener<T> Listener, ErrorListener errorListener) {    super(method, url, errorListener);    this.clazz = clazz;    this.headers = headers;    this.Listener = Listener;    if (method == Method.POST && params != null && params.size() > 0) {        setRetryPolicy(new DefaultRetryPolicy(12000, 0,                DefaultRetryPolicy.DEFAulT_BACKOFF_MulT));        poststring = new GsonBuilder().create().toJson(params);    }}@OverrIDepublic Map<String, String> getheaders() throws AuthFailureError {    return headers != null ? headers : super.getheaders();}@OverrIDepublic byte[] getbody() throws AuthFailureError {    return poststring != null ? poststring.getBytes(Charset            .forname("UTF-8")) : super.getbody();}@OverrIDepublic String getbodyContentType() {    return poststring !=null?"application/Json; charset=utf-8":super.getbodyContentType();}@OverrIDeprotected voID deliverResponse(T response) {    Listener.onResponse(response);}@OverrIDeprotected Response<T> parseNetworkResponse(NetworkResponse response) {    try {        String Json = new String(response.data,                httpheaderParser.parseCharset(response.headers));        Log.i("response", Json);        T responses = new GsonBuilder().create().fromJson(Json, clazz);        return Response.success(responses,                httpheaderParser.parseCacheheaders(response));    } catch (UnsupportedEnCodingException e) {        return Response.error(new ParseError(e));    } catch (JsonSyntaxException e) {        return Response.error(new ParseError(e));    } catch (Exception e) {        return Response.error(new ParseError(e));    }}}

我知道我做错了什么.我已经用普通的httpPost进行了测试,它正在那里工作,但是在使用Volley时,我的POST标题永远不会改变.

解决方法:

我发现我必须覆盖getbodyContentType()才能使Content-Type标头正确更新：

    public String getbodyContentType()    {        return "application/Json; charset=utf-8";    }

这是我的问题,有关此问题的更多详细信息：

> Volley Content-Type header not updating

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