前后台切换监听混淆解决；

lib/union/location_map_page.dart

@@ -138,7 +138,7 @@ class _LocationMap extends State<LocationMap> with WidgetsBindingObserver {
   }
 
   void permissionSettings() async {
-    if (await Permission.location.isGranted) {
+    if (_isShowLocalTips && await Permission.location.isGranted) {
       _isShowLocalTips = false;
       getLocation();
     }
@@ -305,7 +305,7 @@ class _LocationMap extends State<LocationMap> with WidgetsBindingObserver {
                               GestureDetector(
                                 behavior: HitTestBehavior.opaque,
                                 onTap: () {
-                                  if (myCity == null) {
+                                  if (myLatLng == null) {
                                     // onOpenBaiduMap();
                                     SmartDialog.showToast(
                                         "您定位服务未开启，请前往系统设置中开启定位服务",

lib/union/union_page.dart

@@ -20,6 +20,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:flutter_baidu_mapapi_base/flutter_baidu_mapapi_base.dart';
+import 'package:visibility_detector/visibility_detector.dart';
 
 import '../view_widget/location_tips.dart';
 import '../view_widget/no_data_view.dart';
@@ -47,6 +48,7 @@ class UnionPageState extends State<UnionPage>
   String areaName;
   List<GlobalKey> _allKey = [];
   bool _isShowLocalTips = false;
+  double visiblePercentage;
 
   jumpIndex(jpIndex) {
     tabController.index = jpIndex;
@@ -65,6 +67,7 @@ class UnionPageState extends State<UnionPage>
   void didChangeAppLifecycleState(AppLifecycleState state) {
     if (state == AppLifecycleState.resumed) {
       // 处理应用程序切换回前台的逻辑
+      if(visiblePercentage == 1)
       permissionSettings();
     } else if (state == AppLifecycleState.paused) {
       // 处理应用程序切换到后台的逻辑
@@ -203,7 +206,14 @@ class UnionPageState extends State<UnionPage>
   @override
   Widget build(BuildContext context) {
     super.build(context);
-    return GestureDetector(
+    return VisibilityDetector(
+        key: Key('my-widget-key'),
+        onVisibilityChanged: (visibilityInfo) {
+          visiblePercentage = visibilityInfo.visibleFraction;
+          if(visiblePercentage == 1)
+            permissionSettings();
+        },
+        child: GestureDetector(
       behavior: HitTestBehavior.translucent,
       onTap: () {
         FocusScope.of(context).requestFocus(FocusNode());
@@ -337,7 +347,7 @@ class UnionPageState extends State<UnionPage>
             )
         ],
       ),
-    );
+    ));
   }
 
   Widget buildSearchItem() {

pubspec.lock

@@ -781,7 +781,7 @@ packages:
       name: tobias
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.4.2"
+    version: "2.4.1"
   tpns_flutter_plugin:
     dependency: "direct main"
     description:
@@ -903,6 +903,13 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.15"
+  visibility_detector:
+    dependency: "direct main"
+    description:
+      name: visibility_detector
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.3.3"
   wakelock:
     dependency: transitive
     description:

pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
     sdk: flutter
   fluwx: 3.9.0+2
 
-  tobias: ^2.4.1
+  tobias: 2.4.1
 
 
   gradient_widgets: ^0.6.0
@@ -58,6 +58,8 @@ dependencies:
 
   gbk2utf8: ^1.0.1
 
+  visibility_detector: ^0.3.3
+
   event_bus: ^2.0.0
   intl: ^0.17.0
   shared_preferences: ^2.0.6