#1153 Boost接管handleAppLifecycleStateChanged，让Flutter生命周期与应用前后台对齐

example/lib/main.dart

@@ -16,6 +16,7 @@ import 'package:flutter_boost_example/tab/simple_widget.dart';
 void main() {
   PageVisibilityBinding.instance
       .addGlobalObserver(AppGlobalPageVisibilityObserver());
+  CustomFlutterBinding();
   runApp(MyApp());
 }
 
@@ -57,6 +58,10 @@ class AppGlobalPageVisibilityObserver extends GlobalPageVisibilityObserver {
   }
 }
 
+class CustomFlutterBinding extends WidgetsFlutterBinding with BoostFlutterBinding {
+
+}
+
 class CustomInterceptor1 extends BoostInterceptor {
   @override
   void onPush(BoostInterceptorOption option, PushInterceptorHandler handler) {

lib/boost_flutter_binding.dart

@@ -0,0 +1,37 @@
+
+import 'package:flutter/widgets.dart';
+import 'package:flutter/scheduler.dart';
+import 'logger.dart';
+
+mixin BoostFlutterBinding on WidgetsFlutterBinding {
+
+  bool _appLifecycleStateLocked = true;
+
+  @override
+  void initInstances() {
+    super.initInstances();
+    _instance = this;
+    changeAppLifecycleState(AppLifecycleState.resumed);
+  }
+
+  static BoostFlutterBinding get instance => _instance;
+  static BoostFlutterBinding _instance;
+
+  @override
+  void handleAppLifecycleStateChanged(AppLifecycleState state) {
+    if (_appLifecycleStateLocked) {
+      return;
+    }
+    Logger.log('boost_flutter_binding: handleAppLifecycleStateChanged ${state.toString()}');
+    super.handleAppLifecycleStateChanged(state);
+  }
+
+  void changeAppLifecycleState(AppLifecycleState state) {
+    if (SchedulerBinding.instance.lifecycleState == state) {
+      return;
+    }
+    _appLifecycleStateLocked = false;
+    handleAppLifecycleStateChanged(state);
+    _appLifecycleStateLocked = true;
+  }
+}

lib/boost_lifecycle_binding.dart

@@ -3,6 +3,7 @@ import 'package:flutter/widgets.dart';
 import 'boost_container.dart';
 import 'logger.dart';
 import 'page_visibility.dart';
+import 'boost_flutter_binding.dart';
 
 class BoostLifecycleBinding {
   BoostLifecycleBinding._();
@@ -79,11 +80,14 @@ class BoostLifecycleBinding {
     Logger.log('boost_lifecycle: BoostLifecycleBinding.appDidEnterForeground');
     PageVisibilityBinding.instance
         .dispatchPageForgroundEvent(container.topPage.route);
+
+    BoostFlutterBinding.instance.changeAppLifecycleState(AppLifecycleState.resumed);
   }
 
   void appDidEnterBackground(BoostContainer container) {
     Logger.log('boost_lifecycle: BoostLifecycleBinding.appDidEnterBackground');
     PageVisibilityBinding.instance
         .dispatchPageBackgroundEvent(container.topPage.route);
+    BoostFlutterBinding.instance.changeAppLifecycleState(AppLifecycleState.paused);
   }
 }

lib/flutter_boost.dart

@@ -7,3 +7,4 @@ export 'flutter_boost_app.dart';
 export 'logger.dart';
 export 'page_visibility.dart';
 export 'boost_channel.dart';
+export 'boost_flutter_binding.dart';