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我有一個應用程序，其中onCreate其發送請求到服務器，我又添加了一個SwipeRefresh，當我再次向下滑動時，請求被髮送到服務器。如何在刷新時刷新進度對話框在Android中刷新？
問題是，當我向下滑動時，ProgressDialog顯示給我，我不想要。我想要的是，如果刷卡刷新，然後不顯示ProgressDialog，否則顯示ProgressDialog。
代碼： -
m_SwipeRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
getWalletBalance();
}
});
/* Here in this method we send request to server for wallet balance */
private void getWalletBalance() {
CLoginSessionManagement s_oSessionManagement = new CLoginSessionManagement(getApplicationContext());// making object of Registartion session management
// retreive user data from shared preferencce........
HashMap<String, String> user = s_oSessionManagement.getLoginDetails();// getting String from Regisatrtion session
String m_szMobileNumber = user.get(CLoginSessionManagement.s_szKEY_MOBILE).trim();
String m_szEncryptedPassword = user.get(CLoginSessionManagement.s_szKEY_PASSWORD).trim();
try {
String json;
// 3. build jsonObject
JSONObject jsonObject = new JSONObject();
jsonObject.put("agentCode", m_szMobileNumber);// sending mobile no.(static right know becuse of ser side data on other is null
jsonObject.put("pin", m_szEncryptedPassword);// same here as said above
// 4. convert JSONObject to JSON to String
json = jsonObject.toString();
Log.i(TAG, "Server request:-" + json);
//here I am getting error
m_Dialog = DialogUtils.showProgressDialog(getApplicationContext(),"Fetching wallet details...");
final String s_szWalletURL = "http://metallica/getWalletBalanceInJSON";
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, s_szWalletURL, jsonObject, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.e(TAG, "Server Response:-" + response);
if (m_SwipeRefresh.isRefreshing()){
m_SwipeRefresh.setRefreshing(false);
}else {
m_Dialog.dismiss();
}
try {
int nResultCodeFromServer = Integer.parseInt(response.getString("resultcode"));
if (nResultCodeFromServer == CStaticVar.m_kTRANSACTION_SUCCESS) {
s_szWalletBalance = response.getString("walletbalance").trim();// get wallet balance fro response
String trimwalletBalance = s_szWalletBalance.substring(0, s_szWalletBalance.indexOf("."));// trim waalet balance from response.
CWalletDataModel.getInstance().setS_szWalletBalance(trimwalletBalance);// set wallet balance
// showing wallet transaction in textView....
m_WalletText.setText(CWalletDataModel.getInstance().getS_szWalletBalance());
} else if (nResultCodeFromServer == CStaticVar.m_kCONNECTION_NOT_AVAILABLE) {
CSnackBar.getInstance().showSnackBarError(m_MainLayout, "Connection not available", getApplicationContext());
} else if (nResultCodeFromServer == CStaticVar.m_kTIMED_OUT) {
CSnackBar.getInstance().showSnackBarError(m_MainLayout, "Timed Out", getApplicationContext());
} else if (nResultCodeFromServer == CStaticVar.m_kTECHNICAL_FAILURE) {
CSnackBar.getInstance().showSnackBarError(m_MainLayout, "Technical Failure", getApplicationContext());
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Server Error:-" + error);
m_Dialog.dismiss();
if (m_SwipeRefresh.isRefreshing()){
m_SwipeRefresh.setRefreshing(false);
}else {
m_Dialog.dismiss();
}
if (error instanceof TimeoutError) {
CSnackBar.getInstance().showSnackBarError(m_MainLayout, "Connection time out! please try again", getApplicationContext());
} else if (error instanceof NetworkError) {
CSnackBar.getInstance().showSnackBarError(m_MainLayout, "No Internet connection", getApplicationContext());
}
}
});
requestQueue.add(jsonObjectRequest);
} catch (JSONException e) {
e.printStackTrace();
}
}
mohit它的工作.......... – Niraj
但當我按服務器請求期間的主頁按鈕.....它給我錯誤........ mDialog.dismiss（）作爲空指針異常 – Niraj
檢查出我編輯的代碼，它將正常工作..更安全地把該行放在Try-Catch塊中也... –