更新高德地图key

修改_location变量避空，使得高德地图不可用时不会卡在启动页

android/app/src/main/AndroidManifest.xml

@@ -7,7 +7,7 @@
   <application android:name="io.flutter.app.FlutterApplication" android:label="小蜜蜂智慧社区" android:icon="@mipmap/ic_launcher" android:networkSecurityConfig="@xml/network_security_config">
   <service android:name="com.amap.api.location.APSService"></service>
   <meta-data android:name="com.amap.api.v2.apikey"
-                 android:value="ee697f99e8381b7efde08b9976052bd0"/>
+                 android:value="717cf8c606307809bcbd6661123b9837"/>
     <activity android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
       <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user

lib/pages/one_alarm/widget/alarm_page.dart

@@ -68,8 +68,8 @@ class _AlarmPageState extends State<AlarmPage> {
               final appProvider =
                   Provider.of<AppProvider>(context, listen: false);
               LatLng _target = LatLng(
-                appProvider.location!['latitude'] as double,
+                (appProvider.location?['latitude'] ?? 0) as double,
-                appProvider.location!['longitude'] as double,
+                (appProvider.location?['longitude'] ?? 0 )as double,
               );
               _mapController = controller;
               _mapController!.moveCamera(
@@ -127,7 +127,7 @@ class _AlarmPageState extends State<AlarmPage> {
                               child: Text(
                                 (appProvider.location == null)
                                     ? '加载中……'
-                                    : appProvider.location!['address']
+                                    : (appProvider.location?['address'] ?? '')
                                         as String,
                                 style: TextStyle(
                                   color: Color(0xff666666),

lib/provider/app_provider.dart

@@ -174,8 +174,8 @@ class AppProvider extends ChangeNotifier {
       longitude = 116.46;
       latitude = 39.92;
     } else {
-      longitude = _location!['longitude'];
+      longitude = _location?['longitude']??116.46;
-      latitude = _location!['latitude'];
+      latitude = _location?['latitude']??39.92;
     }
 
     Response response = await Dio().get(