我正在尝试Post某些JsonObject使用android中的Volley库的服务器。我怀疑getparams方法没有被调用，我的数据没有被发布。任何人都可以一步一步地指导我，我会出错。我的代码如下：
case R.id.bt_search:
try {
jObj.put("FromDate", "04-10-2014");
jObj.put("Todate", "04-11-2014");
jObj.put("BillNumber", bill);
jObj.put("Status", "NotClosed");
jObj.put("OrderType", "1,2,3" /* Ordertype */);
Log.i("json data on clicking search", "" + jObj);
makeJsonObjReq(jObj);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
private void makeJsonObjReq(final JSONObject jObj) {
// TODO Auto-generated method stub
RequestQueue rq = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(
Method.POST,
"myurl",
null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject arg0) {
// TODO Auto-generated method stub
Log.d("server Response", arg0.toString());
try {
for (int i = 0; i < arg0.length(); i++) {
}
} catch (Exception e) {
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError arg0) {
// TODO Auto-generated method stub
VolleyLog.d("Error msg from server",
"Error: " + arg0.getMessage());
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
// TODO Auto-generated method stub
Map<String, String> params = new HashMap<String, String>();
params.put("data", jObj.toString());
//return params;
return super.getParams();
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
// TODO Auto-generated method stub
return super.getHeaders();
}
};
com.cashier.volley_helper.AppController.getInstance()
.addToRequestQueue(jsonObjReq);
rq.add(jsonObjReq);
};
答案 0 :(得分：1)
您必须修改getParams（）方法
private void makeJsonObjReq(final JSONObject jObj) {
// TODO Auto-generated method stub
RequestQueue rq = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(
Method.POST,
"myurl",
null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject arg0) {
// TODO Auto-generated method stub
Log.d("server Response", arg0.toString());
try {
for (int i = 0; i < arg0.length(); i++) {
}
} catch (Exception e) {
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError arg0) {
// TODO Auto-generated method stub
VolleyLog.d("Error msg from server",
"Error: " + arg0.getMessage());
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
// TODO Auto-generated method stub
Map<String, String> params = super.getParams();
if( params==null)
params =new HashMap<String, String>();
params.put("data", jObj.toString());
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
// TODO Auto-generated method stub
return super.getHeaders();
}
};
com.cashier.volley_helper.AppController.getInstance()
.addToRequestQueue(jsonObjReq);
rq.add(jsonObjReq);
}
答案 1 :(得分：1)
您可以像这样使用自定义请求类
public class CustomRequest extends Request<JSONObject> {
@Override
public Entry getCacheEntry() {
// TODO Auto-generated method stub
return super.getCacheEntry();
}
@Override
public String getCacheKey() {
// TODO Auto-generated method stub
return super.getCacheKey();
}
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;
}
@Override
protected Map<String, String> getParams()
throws com.android.volley.AuthFailureError {
System.out.println(params);
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);
}
}
并像这样使用
WeakHashMap<String, String> params = new WeakHashMap<String, String>();
params.put("product_id", DetailsFragment.product_id);
System.out.println("Printing the Jsoparams" + params);
CustomRequest request = new CustomRequest(Method.POST, url, params,
this.createMyReqSuccessListener(),
this.createMyReqErrorListener()) {
};
volley.addToRequestQueue(request, DETAILS, true);
private Response.Listener<JSONObject> createMyReqSuccessListener() {
return new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("response from services", response.toString());
//Parse the response here
};
}
private Response.ErrorListener createMyReqErrorListener() {
return new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("Printing the Error" + error);
System.out.println(VolleyErrorHelper.getMessage(error));
}
};
}