接收带有 json 请求的布尔变量

Question

我正在尝试使用 android 中的 volley 通过 web-api 向 MVC 服务器发出请求，我想将函数的参数作为 JSON（请求正文），所以我使用 JSONRequest 进行调用，但问题是 JSONRequest 强制您使用 Response.Listner，而我正在调用的函数 returns 一个布尔变量，所以每次调用时我都会遇到转换错误

我尝试进行接受布尔值的自定义调用，但现在出现错误 400，我不知道为什么，有没有办法让 jsonRequest 接收布尔值？如果没有，解决方案是什么？

我第一次使用的功能：

public void getJSON(String controllerName,String actionName, JSONObject requestBody,Response.Listener<JSONObject> success,Response.ErrorListener error){
    String url = makeURL(controllerName,actionName);
    JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST,url,requestBody,success,error);
    request.setTag(APP_TAG);
    requestQueue.add(request);
}

这是我对自定义请求的第二次尝试（出现错误 400）：

public void getBooleanRequest(String controllerName,String actionName, final HashMap<String,String> body, final HashMap<String,String> header, final Response.Listener<Boolean> success,Response.ErrorListener error){
    String url = makeURL(controllerName,actionName);
    Request<Boolean> request = new Request<Boolean>(Request.Method.POST,url,error) {
        @Override
        protected Response<Boolean> parseNetworkResponse(NetworkResponse response) {
            return Response.success(true, HttpHeaderParser.parseCacheHeaders(response));
        }

        @Override
        protected void deliverResponse(Boolean response) {
            success.onResponse(response);
        }

        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            return body;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            return header;
        }
    };
    request.setTag(APP_TAG);
    requestQueue.add(request);
}

Answer 1

您可以试试我下面的示例代码：

private class BooleanRequest extends Request<Boolean> {
    private final Response.Listener<Boolean> mListener;
    private final Response.ErrorListener mErrorListener;
    private final String mRequestBody;

    private final String PROTOCOL_CHARSET = "utf-8";
    private final String PROTOCOL_CONTENT_TYPE = String.format("application/json; charset=%s", PROTOCOL_CHARSET);

    public BooleanRequest(int method, String url, String requestBody, Response.Listener<Boolean> listener, Response.ErrorListener errorListener) {
        super(method, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
        this.mRequestBody = requestBody;
    }

    @Override
    protected Response<Boolean> parseNetworkResponse(NetworkResponse response) {
        Boolean parsed;
        try {
            parsed = Boolean.valueOf(new String(response.data, HttpHeaderParser.parseCharset(response.headers)));
        } catch (UnsupportedEncodingException e) {
            parsed = Boolean.valueOf(new String(response.data));
        }
        return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
    }

    @Override
    protected VolleyError parseNetworkError(VolleyError volleyError) {
        return super.parseNetworkError(volleyError);
    }

    @Override
    protected void deliverResponse(Boolean response) {
        mListener.onResponse(response);
    }

    @Override
    public void deliverError(VolleyError error) {
        mErrorListener.onErrorResponse(error);
    }

    @Override
    public String getBodyContentType() {
        return PROTOCOL_CONTENT_TYPE;
    }

    @Override
    public byte[] getBody() throws AuthFailureError {
        try {
            return mRequestBody == null ? null : mRequestBody.getBytes(PROTOCOL_CHARSET);
        } catch (UnsupportedEncodingException uee) {
            VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s",
                    mRequestBody, PROTOCOL_CHARSET);
            return null;
        }
    }
}

然后在你的 Activity:

   try {
        JSONObject jsonBody;
        jsonBody = new JSONObject();
        jsonBody.put("Title", "Android Demo");
        jsonBody.put("Author", "BNK");
        jsonBody.put("Date", "2015/08/28");
        String requestBody = jsonBody.toString();
        BooleanRequest booleanRequest = new BooleanRequest(0, url, requestBody, new Response.Listener<Boolean>() {
            @Override
            public void onResponse(Boolean response) {
                Toast.makeText(mContext, String.valueOf(response), Toast.LENGTH_SHORT).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(mContext, error.toString(), Toast.LENGTH_SHORT).show();
            }
        });
        // Add the request to the RequestQueue.
        queue.add(booleanRequest);
    } catch (JSONException e) {
        e.printStackTrace();
    }

接收带有 json 请求的布尔变量

receiving Boolean variable with json request in volley

asp.net-mvc

android

asp.net-web-api

android-volley