admin管理员组文章数量:1324669
When using PopScope to handle any predictive back animation(as in the official documentation), I don't receive any confirmation time for going back and instead, the app just goes back without waiting for the user to again click back.
Here is my main screen(settings_screen.dart):
import 'package:flutter/material.dart';
import 'package:weatherfast/about_screen.dart';
import 'package:weatherfast/help_screen.dart';
class SettingsScreen extends StatelessWidget {
const SettingsScreen({super.key});
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Icon(Icons.settings, size: 50, color: Colors.blue),
const SizedBox(height: 10),
const Text(
'Settings',
style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
const SizedBox(height: 20),
ListView(
shrinkWrap: true,
children: [
ListTile(
leading: const Icon(Icons.info_rounded),
title: const Text('About App'),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(builder: (_) => AboutScreen()),
);
},
),
ListTile(
leading: const Icon(Icons.question_answer_rounded),
title: const Text('Help and Feedback'),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(builder: (_) => const HelpScreen()),
);
},
),
],
),
],
),
);
}
}
And here is the screen I am trying to navigate to and back from(help_screen.dart):
import 'package:flutter/material.dart';
import 'webview_screen.dart'; // Import your WebViewScreen here
class HelpScreen extends StatelessWidget {
const HelpScreen({super.key});
@override
Widget build(BuildContext context) {
// Define URLs for Feature Request and Bug Report
const featureRequestUrl = '/yWgLvBr2vMagmFbQ8';
const bugReportUrl = '/vmdA2oyWtLtDu8jA8';
// List items for the screen
final List<Map<String, String>> items = [
{'title': 'Feature Request', 'url': featureRequestUrl},
{'title': 'Bug Report', 'url': bugReportUrl},
];
return PopScope(
canPop: true,
child: Scaffold(
appBar: AppBar(title: const Text('Help and Feedback')),
body: ListView.builder(
itemCount: items.length,
itemBuilder: (context, index) {
final item = items[index];
return ListTile(
title: Text(item['title']!),
trailing: const Icon(Icons.arrow_forward),
onTap: () {
// Navigate to WebViewScreen with the selected URL
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => WebViewScreen(url: item['url']!),
),
);
},
);
},
),
),
);
}
}
Device I am testing on: Samsung S24 FE running Android 14.
Help would be greatly appreciated.
When using PopScope to handle any predictive back animation(as in the official documentation), I don't receive any confirmation time for going back and instead, the app just goes back without waiting for the user to again click back.
Here is my main screen(settings_screen.dart):
import 'package:flutter/material.dart';
import 'package:weatherfast/about_screen.dart';
import 'package:weatherfast/help_screen.dart';
class SettingsScreen extends StatelessWidget {
const SettingsScreen({super.key});
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Icon(Icons.settings, size: 50, color: Colors.blue),
const SizedBox(height: 10),
const Text(
'Settings',
style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
const SizedBox(height: 20),
ListView(
shrinkWrap: true,
children: [
ListTile(
leading: const Icon(Icons.info_rounded),
title: const Text('About App'),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(builder: (_) => AboutScreen()),
);
},
),
ListTile(
leading: const Icon(Icons.question_answer_rounded),
title: const Text('Help and Feedback'),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(builder: (_) => const HelpScreen()),
);
},
),
],
),
],
),
);
}
}
And here is the screen I am trying to navigate to and back from(help_screen.dart):
import 'package:flutter/material.dart';
import 'webview_screen.dart'; // Import your WebViewScreen here
class HelpScreen extends StatelessWidget {
const HelpScreen({super.key});
@override
Widget build(BuildContext context) {
// Define URLs for Feature Request and Bug Report
const featureRequestUrl = 'https://forms.gle/yWgLvBr2vMagmFbQ8';
const bugReportUrl = 'https://forms.gle/vmdA2oyWtLtDu8jA8';
// List items for the screen
final List<Map<String, String>> items = [
{'title': 'Feature Request', 'url': featureRequestUrl},
{'title': 'Bug Report', 'url': bugReportUrl},
];
return PopScope(
canPop: true,
child: Scaffold(
appBar: AppBar(title: const Text('Help and Feedback')),
body: ListView.builder(
itemCount: items.length,
itemBuilder: (context, index) {
final item = items[index];
return ListTile(
title: Text(item['title']!),
trailing: const Icon(Icons.arrow_forward),
onTap: () {
// Navigate to WebViewScreen with the selected URL
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => WebViewScreen(url: item['url']!),
),
);
},
);
},
),
),
);
}
}
Device I am testing on: Samsung S24 FE running Android 14.
Help would be greatly appreciated.
Share Improve this question edited Mar 3 at 6:46 ChocordDaCoder asked Jan 13 at 8:16 ChocordDaCoderChocordDaCoder 677 bronze badges1 Answer
Reset to default 2You should be having onPopInvokedWithResult handler function to handle the prediction logic and decide the value of canPop.
If "canPop" is set to true, it means that the page can be poped and will always be poped when pressed the back button. Set the value of canPop to a variable and set its value dynamically inside the onPopInvokedWithResult handler function. Something like below
@override
Widget build(BuildContext context) {
bool canPopNow = false;
.
.
return PopScope(
canPop: canPopNow,
onPopInvokedWithResult: (bool didPop, dynamic) {
if(<condition>){
// add the condition to check if the page can be popped on the next back press
setState((){
canPopNow = true;
});
// Now on the next back press, the page will be poped
}
else{
setState((){
canPopNow = false;
});
}
// If you want to give the user a time limit for the second back press, say 2 seconds, reset the value of canPopNow to false as below.
Timer(const Duration(seconds: 2), () {
setState((){
canPopNow = false;
});
});
}
child: Scaffold(
appBar: AppBar(title: const Text('Help and Feedback')),
body: ListView.builder(
itemCount: items.length,
itemBuilder: (context, index) {
final item = items[index];
return ListTile(
title: Text(item['title']!),
trailing: const Icon(Icons.arrow_forward),
onTap: () {
// Navigate to WebViewScreen with the selected URL
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => WebViewScreen(url: item['url']!),
),
);
},
);
},
),
),
);
}
本文标签：
版权声明：本文标题：Using PopScope Flutter Android doesn't work, instead goes back without any confirmation time - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1742118056a2421560.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。
发表评论