Fix compile errors

android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -36,7 +36,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "org.thingsboard.app"
         minSdkVersion 21
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

lib/core/auth/login/login_page.dart

@@ -4,6 +4,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:form_builder_validators/form_builder_validators.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import 'package:material_design_icons_flutter/material_design_icons_flutter.dart';
 import 'package:thingsboard_app/constants/assets_path.dart';

lib/core/auth/login/reset_password_request_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:form_builder_validators/form_builder_validators.dart';
 import 'package:thingsboard_app/core/auth/login/login_page_background.dart';
 import 'package:thingsboard_app/core/context/tb_context.dart';
 import 'package:thingsboard_app/core/context/tb_context_widget.dart';

lib/modules/profile/change_password_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:form_builder_validators/form_builder_validators.dart';
 import 'package:thingsboard_app/core/context/tb_context.dart';
 import 'package:thingsboard_app/core/context/tb_context_widget.dart';
 import 'package:thingsboard_app/widgets/tb_app_bar.dart';

lib/modules/profile/profile_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:form_builder_validators/form_builder_validators.dart';
 import 'package:thingsboard_app/modules/profile/change_password_page.dart';
 import 'package:thingsboard_app/widgets/tb_app_bar.dart';
 

lib/utils/services/widget_action_handler.dart

@@ -214,8 +214,8 @@ class WidgetActionHandler with HasTbContext {
   Future<WidgetMobileActionResult> _scanQrCode() async {
     try {
       Barcode? barcode = await tbContext.navigateTo('/qrCodeScan', transition: TransitionType.nativeModal);
-      if (barcode != null) {
-        return WidgetMobileActionResult.successResult(MobileActionResult.qrCode(barcode.code, describeEnum(barcode.format)));
+      if (barcode != null && barcode.code != null) {
+        return WidgetMobileActionResult.successResult(MobileActionResult.qrCode(barcode.code!, describeEnum(barcode.format)));
       } else {
         return WidgetMobileActionResult.emptyResult();
       }

pubspec.lock

@@ -167,6 +167,11 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.9.2"
+  flutter_localizations:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -240,6 +245,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  form_builder_validators:
+    dependency: "direct main"
+    description:
+      name: form_builder_validators
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "7.2.0"
   geolocator:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -38,6 +38,7 @@ dependencies:
   dart_jsonwebtoken: ^2.2.0
   crypto: ^3.0.1
   flutter_form_builder: ^7.0.0
+  form_builder_validators: ^7.2.0
   universal_platform: ^1.0.0+1
   preload_page_view: ^0.1.6