Smoth screen changes. Step 1

lib/main.dart

@@ -1,23 +1,99 @@
+import 'package:checker/db.dart';
+import 'package:checker/strings.dart';
 import 'package:flutter/material.dart';
 import 'package:checker/screens/splash.dart';
 import 'package:flutter/services.dart';
 
 const platform = const MethodChannel('com.dinect.checker/instance_id');
 
-void main() {
-  platform.invokeMethod('getAppTitle').then((title) {
-    runApp(new Checker(appName: title));
+main() {
+
+  platform.invokeMethod('getFlavor').then((flavor) {
+    platform.invokeMethod('getAppTitle').then((title) {
+
+      String app = flavor;  // dinect, autobonus
+      String appName= title;  // Dinect, Dinect (INT), Autobonus
+
+      SqliteHelper helper = new SqliteHelper();
+
+      helper.open().then((_) {
+        helper.getLocale().then((locale) {
+          if (locale == null) {
+            initWithSystemValue(app, appName, helper);
+          } else {
+            start(app, appName, locale, helper);
+          }
+        });
+      });
+    });
   });
 }
 
-class Checker extends StatelessWidget {
-  Checker({this.appName});
+initWithSystemValue(String app, String name, SqliteHelper helper) {
+  platform.invokeMethod('getLocale').then((locale) {
+    helper.getSettings(false).then((settings) {
+      if (settings == null) {
+        createSettingsTable(app, name, locale, helper);
+      } else {
+        start(app, name, locale, helper);
+      }
+    });
+  });
+}
+
+createSettingsTable(String app, String name, String locale, SqliteHelper helper) {
+  platform.invokeMethod('getCurrency').then((currency) {
+    helper.createAppInfo(currency);
+    start(app, name, locale, helper);
+  });
+}
+
+start(String app, String name, String locale, SqliteHelper helper) {
+  StringsLocalization.load(locale).then((_) {
+    runApp(new Checker(app, name, locale, helper));
+  });
+}
+
+class Checker extends StatefulWidget {
+
+  /// Класс для работы с бд
+  final SqliteHelper helper;
+
+  /// Тип сборки. Определяет, какие брать ресурсы (цвета, картинки)
+  final String app;
+
+  /// Отображаемое в заголовке приложения названия (когда показывается список запущенных приложений)
   final String appName;
 
-  @override Widget build (BuildContext context) {
+  /// Локаль приложения
+  final String locale;
+
+  Checker(this.app, this.appName, this.locale, this.helper);
+
+  @override
+  State<StatefulWidget> createState() => new CheckerState(
+    this.app,
+    this.appName,
+    this.locale,
+    this.helper);
+}
+
+class CheckerState extends State<Checker> {
+
+  SqliteHelper helper;
+  String app;
+  String appName;
+  String locale;
+
+  String token;
+
+  CheckerState(this.app, this.appName, this.locale, this.helper);
+
+  @override
+  Widget build(BuildContext context) {
     return new MaterialApp(
         title: appName,
-        home: new SplashScreen()
+        home: new SplashScreen(helper, app)
     );
   }
 }