当用户向下滚动请求被发送到服务器以获取更多数据时，我有一个包含Listview的活动请求通过参数count = 5（它始终是静态的）发送并且last = 5并且再次向下滚动最后变为10并且我想当服务器响应是“没有项目”然后我想取消凌空请求列表视图向下滚动。我怎么能这样做
Listview的代码向下滚动;@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE && bBottomOfView) {
Log.i("Listview", "scrolling stopped...");
if (NetworkUtil.isConnected(getActivity())) {
m_n_DefaultRecordCount = 5;// increment of record count by 5 on next load data
m_n_DeafalutLastCount = m_n_DeafalutLastCount + 5;// same here.....as above
sz_RecordCount = String.valueOf(m_n_DefaultRecordCount);// convert int value to string
sz_LastCount = String.valueOf(m_n_DeafalutLastCount);// convert int value to string /////
Log.e(TAG, "Last Count::" + sz_LastCount);
Log.e(TAG, "Record count::" + sz_RecordCount);
loadmoreData();
} else {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Please check internet connection !", getActivity());
m_ListView.removeFooterView(mFooter);
}
}
}
和用于加载更多数据的代码
public void loadmoreData() {
try {
String json;
// 3. build jsonObject
final JSONObject jsonObject = new JSONObject();// making object of Jsons.
jsonObject.put("agentCode", m_szMobileNumber);// put mobile number
jsonObject.put("pin", m_szEncryptedPassword);// put password
jsonObject.put("recordcount", sz_RecordCount);// put record count
jsonObject.put("lastcountvalue", sz_LastCount);// put last count
Log.d("CAppList:", sz_RecordCount);
Log.d("Capplist:", sz_LastCount);
// 4. convert JSONObject to JSON to String
json = jsonObject.toString();// convert Json object to string
Log.i(TAG, "Server Request:-" + json);
requestQueue = Volley.newRequestQueue(getActivity());
final String m_DealListingURL = "http://202.131.144.1:8080/json/metallica/getDealListInJSON";
jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, m_DealListingURL, jsonObject, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.i(TAG, "Server Response:-" + response);
try {
int nResultCodeFromServer = Integer.parseInt(response.getString("resultcode"));
if (nResultCodeFromServer == m_TRANSACTION_SUCCESSFUL) {
JSONArray posts = response.optJSONArray("dealList");// GETTING DEAL LIST
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.getJSONObject(i);// GETTING DEAL AT POSITION AT I
item = new CDealAppDatastorage();// object create of DealAppdatastorage
item.setM_szHeaderText(post.getString("dealname"));//getting deal name
item.setM_szsubHeaderText(post.getString("dealcode"));// getting deal code
item.setM_szDealValue(post.getString("dealvalue"));
if (!s_oDataset.contains(item)) {
s_oDataset.add(item);
}
}
m_oAdapter.notifyDataSetChanged();
}
if (nResultCodeFromServer == m_kCONNECTION_LOST) {//server based conditions
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Connection Lost !", getActivity());
} else if (nResultCodeFromServer == m_kDEAL_NOT_FOUND) {// serevr based conditions .....
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "No more deals available", getActivity());
if (m_ListView.getFooterViewsCount() != 0) {
m_ListView.removeFooterView(mFooter);
}
} else if (nResultCodeFromServer == m_kTECHNICAL_FAILURE) {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Technical Failure", getActivity());
} else if (nResultCodeFromServer == m_kALREADY_AVAIL_BENEFIT) {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "You have already avail the benefit of this deal", getActivity());
} else if (nResultCodeFromServer == m_kTIMED_OUT) {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Timed Out", getActivity());
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("Error:-" + error);
if (error instanceof TimeoutError) {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "Connection lost ! Please try again", getActivity());
} else if (error instanceof NetworkError) {
CSnackBar.getInstance().showSnackBarError(m_Main.findViewById(R.id.mainLayout), "No internet connection", getActivity());
}
}
});
requestQueue.add(jsonObjectRequest);
} catch (JSONException e) {
e.printStackTrace();
}
}
答案 0 :(得分：1)
您可以取消下面的请求
您必须为每个请求添加标记，以便取消对特定标记的所有请求。
{
"size": 0,
"query": {
"bool": {
"filter": [
{
"range": {
"date": {
"gt": "2016-08-22T00:00:00.000Z",
"lt": "2016-08-22T13:41:09.000Z"
}
}
},
{
"term": {
"service": "http"
}
},
{
"term": {
"destination": "10.17.102.1"
}
}
]
}
},
"aggs": {
"group_by_ip": {
"terms": {
"field": "ip"
}
}
}
}
取消
<强> public static final String TAG = "MyTag";
StringRequest stringRequest; // Assume this exists.
RequestQueue mRequestQueue; // Assume this exists.
// Set the tag on the request.
stringRequest.setTag(TAG);
// Add the request to the RequestQueue.
mRequestQueue.add(stringRequest);