Volley JsonObjectRequest发布请求无效

Question

我正在使用android Volley提出请求.所以我使用这段代码.我不明白一件事.我检查我的服务器,params始终为null.我认为getParams()不起作用.我该怎么做才能解决这个问题.

 RequestQueue queue = MyVolley.getRequestQueue();
        JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST,SPHERE_URL,null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        System.out.println(response);
                        hideProgressDialog();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                      hideProgressDialog();
                    }
                }) {
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<String, String>();
                params.put("id","1");
                params.put("name", "myname");
                return params;
            };
        };
        queue.add(jsObjRequest);

Answer 1

尝试使用这个助手类

import java.io.UnsupportedEncodingException;
import java.util.Map;    
import org.json.JSONException;
import org.json.JSONObject;    
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;

public class CustomRequest extends Request<JSONObject> {

    private Listener<JSONObject> listener;
    private Map<String, String> params;

    public CustomRequest(String url, Map<String, String> params,
            Listener<JSONObject> reponseListener, ErrorListener errorListener) {
        super(Method.GET, url, errorListener);
        this.listener = reponseListener;
        this.params = params;
    }

    public CustomRequest(int method, String url, Map<String, String> params,
            Listener<JSONObject> reponseListener, ErrorListener errorListener) {
        super(method, url, errorListener);
        this.listener = reponseListener;
        this.params = params;
    }

    protected Map<String, String> getParams()
            throws com.android.volley.AuthFailureError {
        return params;
    };

    @Override
    protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString = new String(response.data,
                    HttpHeaderParser.parseCharset(response.headers));
            return Response.success(new JSONObject(jsonString),
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JSONException je) {
            return Response.error(new ParseError(je));
        }
    }

    @Override
    protected void deliverResponse(JSONObject response) {
        // TODO Auto-generated method stub
        listener.onResponse(response);
    }
}

在activity/fragment中使用它

RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
CustomRequest jsObjRequest = new CustomRequest(Method.POST, url, params, this.createRequestSuccessListener(), this.createRequestErrorListener());

requestQueue.add(jsObjRequest);

Answer 2

您可以创建自定义JSONObjectReuqest并覆盖该getParams方法,也可以在构造函数中将它们作为JSONObject要放在请求正文中.

像这样(我编辑了你的代码):

JSONObject obj = new JSONObject();
obj.put("id", "1");
obj.put("name", "myname");

RequestQueue queue = MyVolley.getRequestQueue();
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST,SPHERE_URL,obj,
    new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
             System.out.println(response);
             hideProgressDialog();
        }
    },
    new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
             hideProgressDialog();
        }
    });
queue.add(jsObjRequest);

Answer 3

对我来说很容易!几个星期前我得到了它:

这是getBody()方法,而不是getParams()后期请求.

这是我的:

    @Override
/**
 * Returns the raw POST or PUT body to be sent.
 *
 * @throws AuthFailureError in the event of auth failure
 */
public byte[] getBody() throws AuthFailureError {
    //        Map<String, String> params = getParams();
    Map<String, String> params = new HashMap<String, String>();
    params.put("id","1");
    params.put("name", "myname");
    if (params != null && params.size() > 0) {
        return encodeParameters(params, getParamsEncoding());
    }
    return null;

}

(我假设你要发布你在getParams中写的params)

我给构造函数中的请求提供了参数,但由于您正在动态创建请求,因此您可以在覆盖getBody()方法的内部对其进行硬编码.

这就是我的代码:

    Bundle param = new Bundle();
    param.putString(HttpUtils.HTTP_CALL_TAG_KEY, tag);
    param.putString(HttpUtils.HTTP_CALL_PATH_KEY, url);
    param.putString(HttpUtils.HTTP_CALL_PARAM_KEY, params);

    switch (type) {
    case RequestType.POST:
        param.putInt(HttpUtils.HTTP_CALL_TYPE_KEY, RequestType.POST);
        SCMainActivity.mRequestQueue.add(new SCRequestPOST(Method.POST, url, this, tag, receiver, params));

如果你想要更多这个最后的字符串参数来自:

param = JsonUtils.XWWWUrlEncoder.encode(new JSONObject(paramasJObj)).toString();

paramasJObj是这样的: {"id"="1","name"="myname"}通常的JSON字符串.