pagintion + FIX BUGS

lib/controllers/providers/api/devices_provider.dart

@@ -11,17 +11,19 @@ import 'package:test_sa/models/user.dart';
 class DevicesProvider extends ChangeNotifier {
   //reset provider data
   void reset() {
-    _devices = null;
+    _devices = [];
     _stateCode = null;
   }
 
+  final pageItemNumber = 10;
+  bool nextPage = true;
   // state code of current request to defied error message
   // like 400 customer request failed
   // 500 service not available
   int _stateCode;
   int get stateCode => _stateCode;
 
-  List<Device> _devices;
+  List<Device> _devices=[];
   List<Device> get devices => _devices;
 
   // when categories in-process _loading = true
@@ -52,7 +54,8 @@ class DevicesProvider extends ChangeNotifier {
     Response response;
     try {
       response = await ApiManager.instance.post(URLs.getEquipment, body: {
-        "pageSize": 50,
+        "pageSize": pageItemNumber ,
+        "pageNumber":devices.length ~/ pageItemNumber + 1,
         "siteId": hospitalId,
         if (serialNumber?.isEmpty == false) "assetSerialNumber": serialNumber,
         if (number?.isEmpty == false) "assetNo": number,
@@ -67,8 +70,12 @@ class DevicesProvider extends ChangeNotifier {
     if (response.statusCode >= 200 && response.statusCode < 300) {
       // client's request was successfully received
       List equipmentListJson = json.decode(response.body)["data"];
-      _devices = equipmentListJson.map<Device>((device) => Device.fromJson(device)).toList();
-    }
+      _devices.addAll(equipmentListJson.map<Device>((device) => Device.fromJson(device)).toList());
+      nextPage = true;
+    }else
+      {
+        nextPage = false;
+      }
     _loading = false;
     notifyListeners();
     return response.statusCode;
@@ -89,8 +96,9 @@ class DevicesProvider extends ChangeNotifier {
     Response response;
     try {
       response = await ApiManager.instance.post(URLs.getEquipment, body: {
-        "pageSize": 50,
-        "siteId": hospitalId,
+        "pageSize": pageItemNumber,
+        "pageNumber":devices.length ~/ pageItemNumber + 1,
+        "siteId": devices.length ~/ pageItemNumber + 1,
         if (serialNumber?.isEmpty == false) "assetSerialNumber": serialNumber,
         if (number?.isEmpty == false) "assetNo": number,
       });
@@ -105,6 +113,8 @@ class DevicesProvider extends ChangeNotifier {
         // client's request was successfully received
         List equipmentListJson = json.decode(response.body)["data"];
         page = equipmentListJson.map((device) => Device.fromJson(device)).toList();
+        _devices.addAll(equipmentListJson.map<Device>((device) => Device.fromJson(device)).toList());
+        notifyListeners();
       }
       return page;
     } catch (error) {

lib/views/pages/device_transfer/request_device_transfer.dart

@@ -68,16 +68,17 @@ class _RequestDeviceTransferState extends State<RequestDeviceTransfer> {
     _isLoading = false;
     setState(() {});
     if (status >= 200 && status < 300) {
-      Fluttertoast.showToast(
-        msg: _subtitle.requestCompleteSuccessfully,
-      );
+      // Fluttertoast.showToast(
+      //   msg: _subtitle.requestCompleteSuccessfully,
+      // );
       Navigator.of(context).pop();
-    } else {
-      String errorMessage = HttpStatusManger.getStatusMessage(status: status, subtitle: _subtitle);
-      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
-        content: Text(errorMessage),
-      ));
     }
+    // else {
+    //   String errorMessage = HttpStatusManger.getStatusMessage(status: status, subtitle: _subtitle);
+    //   ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+    //     content: Text(errorMessage),
+    //   ));
+    // }
   }
 
   @override

lib/views/widgets/equipment/single_device_picker.dart

@@ -8,6 +8,7 @@ import 'package:test_sa/controllers/providers/settings/setting_provider.dart';
 import 'package:test_sa/models/device/device.dart';
 import 'package:test_sa/models/subtitle.dart';
 import 'package:test_sa/views/widgets/equipment/device_item.dart';
+import 'package:test_sa/views/widgets/loaders/lazy_loading.dart';
 import 'package:test_sa/views/widgets/loaders/loading_manager.dart';
 import 'package:test_sa/views/widgets/loaders/no_item_found.dart';
 import 'package:test_sa/views/widgets/qr/scan_qr.dart';
@@ -74,7 +75,6 @@ class _SingleDevicePickerState extends State<SingleDevicePicker> {
     if(_firstTime && _devicesProvider.devices != null){
       _searchableList.clear();
       _searchableList.addAll(_devicesProvider.devices);
-      _firstTime = false;
     }
     _subtitle = AppLocalization.of(context).subtitle;
     return Scaffold(
@@ -143,19 +143,31 @@ class _SingleDevicePickerState extends State<SingleDevicePicker> {
             Expanded(
               child: _searchableList.isEmpty ?
               NoItemFound(message: _subtitle.noDeviceFound,):
-              ListView.builder(
-                padding: EdgeInsets.zero,
-                shrinkWrap: true,
-                itemCount: _searchableList.length,
-                itemBuilder: (listContext,itemIndex){
-                  return DeviceItem(
-                    device: _searchableList[itemIndex],
-                    onPressed: (device){
-                      Navigator.of(context).pop(device);
-                    },
+              LazyLoading(
+                nextPage: _devicesProvider.nextPage,
+                onLazyLoad: () async {
+                  await _devicesProvider.getDevicesList(
+                      user: _userProvider.user,
+                      host: _settingProvider.host,
+                      hospitalId: _userProvider.user.hospital?.id,
+                      serialNumber: snController.text,
+                      number: numberController.text
                   );
                 },
-              ),
+                child:ListView.builder(
+                  padding: EdgeInsets.zero,
+                  shrinkWrap: true,
+                  itemCount: _searchableList.length,
+                  itemBuilder: (listContext,itemIndex){
+                    return DeviceItem(
+                      device: _searchableList[itemIndex],
+                      onPressed: (device){
+                        Navigator.of(context).pop(device);
+                      },
+                    );
+                  },
+                ),
+              )
             ),
           ],
         ),

lib/views/widgets/loaders/lazy_loading.dart

@@ -27,12 +27,10 @@ class _LazyLoadingState extends State<LazyLoading> with TickerProviderStateMixin
 
   _scrollListener() async {
     if (!_animationController.isAnimating && !_animationController.isCompleted && widget.nextPage) {
-      _animationController.forward();
-      setState(() {});
+      //_animationController.forward();
       await widget.onLazyLoad();
       await Future.delayed(Duration(milliseconds: 600));
-      setState(() {});
-      _animationController.reverse();
+     // _animationController.reverse();
     }
   }