ns blue_print_service.dart

lib/core/services/blue_print_service.dart

@@ -33,7 +33,7 @@ class BluePrintService extends BaseService {
     } else {
       try {
         await _bluetooth.connect(_device!);
-        await Future.delayed(Duration(seconds: 2));
+        await Future.delayed(Duration(seconds: 5));
         response = true;
       } catch (e) {
         print('Error connect $e');
@@ -55,8 +55,21 @@ class BluePrintService extends BaseService {
     return response;
   }
 
-  Future<bool> printBytes(Uint8List bytes) async {
+  Future<bool> printBytes(Uint8List bytes, { int chunkSizeBytes = 20, int queueSleepTimeMs = 20 }) async {
     Map<String, dynamic> config = Map();
-    return await _bluetooth.rawBytes(config, bytes);
+    final len = bytes.length;
+    List<List<int>> chunks = [];
+    for (var i = 0; i < len; i += chunkSizeBytes) {
+      var end = (i + chunkSizeBytes < len) ? i + chunkSizeBytes : len;
+      chunks.add(bytes.sublist(i, end));
+    }
+
+    for (var i = 0; i < chunks.length; i += 1) {
+      await _bluetooth.rawBytes(config, chunks[i]);
+      await Future.delayed(Duration(milliseconds: queueSleepTimeMs));
+    }
+
+
+    return true;
   }
 }

lib/views/settings/setting_printer_view.dart

@@ -40,10 +40,8 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
   void initState() {
     super.initState();
     _permission();
-
   }
 
-
   void _testPrint() async {
     setState(() {
       _printing = true;
@@ -64,33 +62,35 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
       log.i(chunkSizeBytes);
       log.i(queueSleepTimeMs);
 
-
       // TODO Don't forget to choose printer's paper
-      PaperSize paper = state.printerPaperSize == SettingPrinterPaperM80 ? PaperSize.mm80 : PaperSize.mm58;
+      PaperSize paper = state.printerPaperSize == SettingPrinterPaperM80
+          ? PaperSize.mm80
+          : PaperSize.mm58;
       if (SettingPrinterEncodingImage == state.printerEncoding) {
         final bool res = await printerManager.printBytes(
-            Uint8List.fromList(await testTicketImage(paper)
+            Uint8List.fromList(await testTicketImage(paper)),
-        ));
+            chunkSizeBytes: chunkSizeBytes,
+            queueSleepTimeMs: queueSleepTimeMs);
         _dialogService.showDialog(description: 'result is $res');
       } else {
         final bool res = await printerManager.printBytes(
-            Uint8List.fromList(await printTextCheck(paper, state.printerEncoding!, exampleJson['check_text']))
+            Uint8List.fromList(await printTextCheck(
-        );
+                paper, state.printerEncoding!, exampleJson['check_text'])),
+            chunkSizeBytes: chunkSizeBytes,
+            queueSleepTimeMs: queueSleepTimeMs);
         _dialogService.showDialog(description: 'result is $res');
       }
-
     } catch (e) {
       print('ERROR');
       print(e);
     }
-
+    //10 sec safe disconnect
-    //7 sec safe disconnect
+    await Future.delayed(Duration(seconds: 14));
-    await Future.delayed(Duration(seconds: 15));
     await printerManager.disconnect();
+    await Future.delayed(Duration(seconds: 3));
     setState(() {
       _printing = false;
     });
-
   }
 
   @override
@@ -117,13 +117,17 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
                       }),
                   SettingItem(
                       title: 'Кодировка',
-                      name: vm.printerEncoding != null ? encoding[vm.printerEncoding] : '' ,
+                      name: vm.printerEncoding != null
+                          ? encoding[vm.printerEncoding]
+                          : '',
                       onTap: () {
                         _navigatorService.push(SettingsPrinterEncodingRoute);
                       }),
                   SettingItem(
                       title: 'Ширина ленты',
-                      name: vm.printerPaperSize != null ? paperSize[vm.printerPaperSize] : null ,
+                      name: vm.printerPaperSize != null
+                          ? paperSize[vm.printerPaperSize]
+                          : null,
                       onTap: () {
                         _navigatorService.push(SettingsPrinterPaperRoute);
                       }),
@@ -156,24 +160,24 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
   //Метод для получения постоянного доступа к местополения
   //только для Android
   void _permission() async {
-    if( Platform.isAndroid) {
+    if (Platform.isAndroid) {
       var status = await Permission.location.status;
       log.i(status);
-      if ( status.isDenied || status.isPermanentlyDenied) {
+      if (status.isDenied || status.isPermanentlyDenied) {
         DialogResponse response = await _dialogService.showConfirmationDialog(
           title: 'Доступ',
-          description: 'Для поиска устройств Bluetooth необходимо предоставить доступ к отслеживанию геолокации.',
+          description:
+              'Для поиска устройств Bluetooth необходимо предоставить доступ к отслеживанию геолокации.',
           cancelTitle: 'Нет',
           confirmationTitle: 'Хорошо',
         );
         if (response.confirmed) {
-          if (await Permission.location
+          if (await Permission.location.request().isGranted) {
-              .request()
-              .isGranted) {
             print('Granted');
           } else {
             _dialogService.showDialog(
-                description: 'Необходимо указать постоянный доступ к местоположении для поиска принтера');
+                description:
+                    'Необходимо указать постоянный доступ к местоположении для поиска принтера');
             _navigatorService.pop();
           }
         } else {
@@ -184,8 +188,6 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
   }
 
   void _startInitialPrint() async {
-
-
     if (Platform.isIOS) {
       _testPrint();
     } else {
@@ -195,11 +197,11 @@ class _SettingPrinterViewState extends State<SettingPrinterView> {
         if (val == 12) {
           print('on');
           _testPrint();
-
         } else if (val == 10) {
           print('off');
           _dialogService.showDialog(
-              description: 'Отсутвует соеденение Bluetooth или он отключен' , title: 'Bluetooth');
+              description: 'Отсутвует соеденение Bluetooth или он отключен',
+              title: 'Bluetooth');
         }
         print('state is $val');
       });