我想在用户5分钟不交互应用程序时显示某些屏幕保护程序类型的屏幕。因此,有谁知道如何在颤振中实现这种功能。
import 'dart:async';
import 'package:flutter/material.dart';
const timeout = const Duration(seconds: 10);
const ms = const Duration(milliseconds: 1);
Timer timer;
void main() =>
runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
var home = MyHomePage(title: 'Flutter Demo Home Page');
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: home,
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _goToSecondScreen() {
Navigator.pushReplacement(
context,
MaterialPageRoute(builder: (context) => SecondPage()),
);
}
@override
Widget build(BuildContext context) {
return GestureDetector(child: Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Container(),
floatingActionButton: FloatingActionButton(
onPressed: _goToSecondScreen,
tooltip: 'Increment',
child: Icon(Icons.add),
),
), behavior:
HitTestBehavior.translucent, onTapDown: (tapdown) {
print("down");
if (timer != null) {
timer.cancel();
}
timer = startTimeout();
},);
}
startTimeout([int milliseconds]) {
var duration = milliseconds == null ? timeout : ms * milliseconds;
return new Timer(duration, handleTimeout);
}
void handleTimeout() {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => ScreenSaver()),
);
}
}
class SecondPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new Container();
}
}
class ScreenSaver extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new GestureDetector(child:Container(color: Colors.yellow,),
onTap: (){
Navigator.pop(context);
},
);
}
}
这是我试图实现该功能的示例代码。当第二屏幕中的屏幕处于活动状态时,它不起作用,GestureDetector
停止收听。
答案 0 :(得分:1)
您可以将整个应用程序与GestureDetector
一起包装在behavior:
HitTestBehavior.translucent
中,以接收触摸事件,同时允许应用程序中的小部件也接收这些触摸事件。
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