Flutter app（android）在发布模式下无法在真实设备上运行

Question

I've been building a demo app to practice flutter, the app's running perfectly fine in the emulator as well as on real devices when connected. But now, I've been trying to run the APK file on my mobile and it seems to not work. I can log in to the app meaning the internet permission is working. But when it comes to the home screen which pulls data from a server, the app does not work. Maybe there's something wrong in the code relevant, but I can't seem to fix it.

I've attached the code for the home screen as well, the provider part is the thing that is having issues. AND ALSO THE DATABASE HAS THE DATA MEANING THE LIST IS NOT EMPTY AT ALL

 import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import './new_enquiry_screen.dart'; import '../providers/enquiries_provider.dart'; import '../screens/new_enquiry_screen.dart'; import '../widgets/drawer_widget.dart'; import '../widgets/follow_up_list_tile_widget.dart'; class EnquiryScreen extends StatelessWidget { const EnquiryScreen({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return DefaultTabController( length: 3, child: Scaffold( drawer: DrawerWidget(), appBar: AppBar( bottom: const TabBar( tabs: [ Tab(text: 'Follow Ups'), Tab(text: 'Leads'), Tab(text: 'Past'), ], ), title: Text( 'Enquiries', ), backgroundColor: Theme.of(context).primaryColor, ), body: TabBarView( children: [ ChangeNotifierProvider<EnquiriesProvider>.value( value: EnquiriesProvider(), child: Consumer<EnquiriesProvider>( builder: (_, provider, child) { int length = provider.enquiries.length; return length == 0 ? Center( child: CircularProgressIndicator(), ) : ListView.builder( itemCount: length, itemBuilder: (_, index) { return FollowUpListTileWidget( provider.enquiries.elementAt(index), ); }, ); }, ), ), const Center( child: Text('Leads Up'), ), const Center( child: Text('Past Up'), ), ], ), floatingActionButton: FloatingActionButton( backgroundColor: Theme.of(context).primaryColor, onPressed: () { Navigator.of(context).pushNamed(NewEnquiryScreen.routeName); }, child: Icon( Icons.add, color: Theme.of(context).accentColor, size: 30, ), ), ), ); } }

 import 'package:flutter/material.dart'; import '../models/enquiry.dart'; class FollowUpListTileWidget extends StatelessWidget { const FollowUpListTileWidget(this._enquiry, {Key? key}) : super(key: key); final Enquiry _enquiry; @override Widget build(BuildContext context) { return Card( elevation: 10, margin: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 5.0), child: ListTile( leading: CircleAvatar( child: Text( _enquiry.name.characters.first.toUpperCase(), style: TextStyle( color: Theme.of(context).accentColor, ), ), backgroundColor: Theme.of(context).primaryColor, ), title: Text(_enquiry.name), subtitle: FittedBox(child: Text(_enquiry.email)), trailing: Row( mainAxisSize: MainAxisSize.min, children: [ IconButton( color: Theme.of(context).primaryColor, onPressed: () {}, icon: const Icon( Icons.phone, ), ), IconButton( color: Theme.of(context).primaryColor, onPressed: () {}, icon: const Icon(Icons.whatsapp), ), IconButton( color: Theme.of(context).primaryColor, onPressed: () {}, icon: const Icon(Icons.edit), ), ], ), ), ); } }

Answer 1

尝试在真实设备上以调试模式运行应用程序，如果它正在运行，则检查清单文件是否已在android/app/main/AndroidManifest.xml中授予互联网权限，默认情况下在调试模式下互联网权限已退出且最重要请从您的问题标题中删除所有大写字母，因为它很难阅读。