From b13c4b10cc47ba30142a078b714227ecaa264dbe Mon Sep 17 00:00:00 2001
From: wylyl22 <2373073266@qq.com>
Date: Tue, 23 Aug 2022 08:56:45 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=9E=E6=97=B6=E7=9B=91=E5=90=AC=E6=9D=83?=
 =?UTF-8?q?=E9=99=90?=
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---
 lib/ui/home/home_page.dart | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/lib/ui/home/home_page.dart b/lib/ui/home/home_page.dart
index 788f22f..9a2ff13 100644
--- a/lib/ui/home/home_page.dart
+++ b/lib/ui/home/home_page.dart
@@ -26,32 +26,40 @@ class _HomePageState extends State<HomePage> with WidgetsBindingObserver{
   @override
   void initState() {
     super.initState();
+    //页面初始化的时候，添加一个状态的监听者
+    WidgetsBinding.instance.addObserver(this);
     _listenForPermissionStatus();
-    setState(() {
-
-    });
-
+    setState(() {});
+  }
+  @override
+  void dispose(){
+    super.dispose();
+    //页面销毁时移出监听者
+    WidgetsBinding.instance.removeObserver(this);
   }
-
   Future<void> _listenForPermissionStatus() async {
     sms=await Permission.sms.request().isGranted;
     plone =await Permission.phone.request().isGranted;
     setState(() {});
   }
+  @override
   void didChangeAppLifecycleState(AppLifecycleState state){
     super.didChangeAppLifecycleState(state);
     switch (state){
+    //应用状态处于闲置状态，并且没有用户的输入事件，
+    // 注意：这个状态切换到 前后台 会触发，所以流程应该是先冻结窗口，然后停止UI
       case AppLifecycleState.inactive:
-        print("1");
+        print("应用处于闲置状态，这种状态的应用应该假设他们可能在任何时候暂停 切换到后台会触发======");
         break;
       case AppLifecycleState.resumed:
-        print("2");
+        print("应用进入前台——————————");
+        _listenForPermissionStatus();
         break;
       case AppLifecycleState.paused:
-        print("3");
+        print("应用处于不可见状态 后台======");
         break;
       case AppLifecycleState.detached:
-        print("4");
+        print("当前页面即将退出======");
         break;
     }
   }