network error bug fix

lib/api/attendance_api.dart

@@ -0,0 +1,9 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+import 'package:shared_preferences/shared_preferences.dart';
+import 'dart:convert';
+
+class API extends ChangeNotifier {
+  // your api here
+}

lib/homepage.dart

@@ -18,7 +18,6 @@ class HomePage extends StatelessWidget {
           future: api.getData(),
           builder: (BuildContext context, AsyncSnapshot<void> snapshot) {
             if (snapshot.connectionState == ConnectionState.waiting) {
-              // Show shimmer effect while data is loading
               return _buildShimmerEffect();
             } else if (snapshot.hasError) {
               return Column(
@@ -37,9 +36,7 @@ class HomePage extends StatelessWidget {
                       )),
                 ],
               );
-            }
-            else {
-              api.isDataFetched = true;
+            } else {
               return _buildData(api);
             }
           },
@@ -94,10 +91,7 @@ class HomePage extends StatelessWidget {
           child: Lottie.asset(
               "assets/lottieanimations/139432-person-riding-bicycle.json"),
         ),
-        Text(
-            api.personalData != null && api.personalData.isNotEmpty
-                ? '${api.personalData['name']}'
-                : 'Personal data is null or empty',
+        Text('${api.personalData['name']}',
             style: GoogleFonts.poppins(
               color: Colors.white,
               fontSize: 25,
@@ -110,9 +104,7 @@ class HomePage extends StatelessWidget {
           endIndent: 100,
         ),
         Text(
-          api.personalData != null && api.personalData.isNotEmpty
-              ? '${api.personalData['usn']}'
-              : 'Personal data is null or empty',
+          '${api.personalData['usn']}',
           style: GoogleFonts.poppins(
             color: Colors.white,
             fontSize: 15,

lib/main.dart

@@ -337,7 +337,9 @@ class _SLiderState extends State<SLider> {
                         highlightColor: Colors.grey[100]!);
                   } else {
                     return Text(
-                      '${api.personalData['semester']}', //semester
+                      api.attendanceData == null
+                          ? ""
+                          : '${api.personalData['semester']}', //semester
                       style: GoogleFonts.poppins(
                           fontSize: 30, fontWeight: FontWeight.bold),
                     );
@@ -347,9 +349,7 @@ class _SLiderState extends State<SLider> {
 
               Flexible(
                 child: FutureBuilder<void>(
-                  future: api.isDataFetched == false
-                      ? api.getData()
-                      : Future(() => null),
+                  future: api.getData(),
                   builder: (context, snapshot) {
                     if (snapshot.connectionState == ConnectionState.waiting) {
                       // show shimmer effect while waiting for data
@@ -387,6 +387,35 @@ class _SLiderState extends State<SLider> {
                                     fontWeight: FontWeight.bold,
                                     color: Colors.red),
                                 textAlign: TextAlign.center),
+                            const Padding(padding: EdgeInsets.only(top: 10)),
+                            Text(
+                                "If the problem persists, please check your USN and DOB and try again",
+                                style: GoogleFonts.poppins(
+                                    fontSize: 12,
+                                    fontWeight: FontWeight.bold,
+                                    color: Colors.red),
+                                textAlign: TextAlign.center),
+                            Row(
+                              mainAxisAlignment: MainAxisAlignment.center,
+                              children: [
+                                Text("Click the ",
+                                    style: GoogleFonts.poppins(
+                                        fontSize: 12,
+                                        fontWeight: FontWeight.bold,
+                                        color: Colors.red),
+                                    textAlign: TextAlign.center),
+                                const Icon(
+                                  Icons.person,
+                                  color: Colors.red,
+                                ),
+                                Text(" icon to change your USN and/or DOB",
+                                    style: GoogleFonts.poppins(
+                                        fontSize: 12,
+                                        fontWeight: FontWeight.bold,
+                                        color: Colors.red),
+                                    textAlign: TextAlign.center),
+                              ],
+                            ),
                           ],
                         ),
                       );