In app purchase update and optimizations

android/gradle.properties

@@ -2,4 +2,5 @@ org.gradle.jvmargs=-Xmx2g
 org.gradle.daemon=true
 org.gradle.caching=true
 android.useAndroidX=true
-android.enableJetifier=true
+android.enableJetifier=true
+android.enableR8=true

lib/main.dart

@@ -180,7 +180,42 @@ void main() async {
   });
 }
 
-class HAClientApp extends StatelessWidget {
+class HAClientApp extends StatefulWidget {
+
+  @override
+  _HAClientAppState createState() => new _HAClientAppState();
+
+}
+
+class _HAClientAppState extends State<HAClientApp> {
+  StreamSubscription<List<PurchaseDetails>> _subscription;
+  
+  @override
+  void initState() {
+    InAppPurchaseConnection.enablePendingPurchases();
+    final Stream purchaseUpdates =
+        InAppPurchaseConnection.instance.purchaseUpdatedStream;
+    _subscription = purchaseUpdates.listen((purchases) {
+      _handlePurchaseUpdates(purchases);
+    });
+    super.initState();
+  }
+
+  void _handlePurchaseUpdates(purchase) {
+    if (purchase is List<PurchaseDetails>) {
+      if (purchase[0].status == PurchaseStatus.purchased) {
+        eventBus.fire(ShowPopupMessageEvent(
+            title: "Thanks a lot!",
+            body: "Thank you for supporting HA Client development!",
+            buttonText: "Ok"
+        ));
+      } else {
+        Logger.d("Purchase change handler: ${purchase[0].status}");
+      }
+    } else {
+      Logger.e("Something wrong with purchase handling. Got: $purchase");
+    }
+  }
 
   // This widget is the root of your application.
   @override
@@ -233,4 +268,10 @@ class HAClientApp extends StatelessWidget {
       },
     );
   }
+
+  @override
+  void dispose() {
+    _subscription.cancel();
+    super.dispose();
+  }
 }

lib/pages/main.page.dart

@@ -11,7 +11,6 @@ class MainPage extends StatefulWidget {
 
 class _MainPageState extends State<MainPage> with WidgetsBindingObserver, TickerProviderStateMixin {
 
-  StreamSubscription<List<PurchaseDetails>> _subscription;
   StreamSubscription _stateSubscription;
   StreamSubscription _settingsSubscription;
   StreamSubscription _serviceCallSubscription;
@@ -30,11 +29,6 @@ class _MainPageState extends State<MainPage> with WidgetsBindingObserver, Ticker
   @override
   void initState() {
     super.initState();
-    final Stream purchaseUpdates =
-        InAppPurchaseConnection.instance.purchaseUpdatedStream;
-    _subscription = purchaseUpdates.listen((purchases) {
-      _handlePurchaseUpdates(purchases);
-    });
     workManager.Workmanager.initialize(
       updateDeviceLocationIsolate,
       isInDebugMode: false
@@ -147,22 +141,6 @@ class _MainPageState extends State<MainPage> with WidgetsBindingObserver, Ticker
     }
   }
 
-  void _handlePurchaseUpdates(purchase) {
-    if (purchase is List<PurchaseDetails>) {
-      if (purchase[0].status == PurchaseStatus.purchased) {
-        eventBus.fire(ShowPopupMessageEvent(
-            title: "Thanks a lot!",
-            body: "Thank you for supporting HA Client development!",
-            buttonText: "Ok"
-        ));
-      } else {
-        Logger.d("Purchase change handler: ${purchase[0].status}");
-      }
-    } else {
-      Logger.e("Something wrong with purchase handling. Got: $purchase");
-    }
-  }
-
   Future _subscribe() {
     Completer completer = Completer();
     if (_stateSubscription == null) {
@@ -903,7 +881,6 @@ class _MainPageState extends State<MainPage> with WidgetsBindingObserver, Ticker
     _showEntityPageSubscription?.cancel();
     _showErrorSubscription?.cancel();
     _startAuthSubscription?.cancel();
-    _subscription?.cancel();
     _showPageSubscription?.cancel();
     _reloadUISubscription?.cancel();
     //TODO disconnect

pubspec.yaml

@@ -10,16 +10,16 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  web_socket_channel: any
+  web_socket_channel: ^1.1.0
-  shared_preferences: any
+  shared_preferences: ^0.5.6+1
-  progress_indicators: any
+  progress_indicators: ^0.1.4
-  event_bus: any
+  event_bus: ^1.1.1
-  cached_network_image: any
+  cached_network_image: ^2.0.0
-  url_launcher: any
+  url_launcher: ^5.4.1
-  date_format: any
+  date_format: ^1.0.8
   charts_flutter: ^0.8.1
-  flutter_markdown: 0.3.0
+  flutter_markdown: ^0.3.3
-  in_app_purchase: ^0.2.1+4
+  in_app_purchase: ^0.3.0+3
   flutter_custom_tabs: ^0.6.0
   flutter_webview_plugin: ^0.3.10+1
   firebase_messaging: ^5.1.6