[英]How to intercept flutter back-button when keyboard is shown
您可以使用keyboard_visibility包來實現此目的。
工作實例
關閉鍵盤后,以下代碼將顯示SnackBar
。
import 'package:flutter/material.dart';
import 'package:keyboard_visibility/keyboard_visibility.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
GlobalKey<ScaffoldState> _key;
@override
void initState() {
super.initState();
_key = GlobalKey<ScaffoldState>();
KeyboardVisibilityNotification().addNewListener(
onHide: () {
_key.currentState.showSnackBar(
SnackBar(
content: Text("Keyboard closed"),
),
);
},
);
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
key: _key,
body: Center(
child: TextField(),
),
),
);
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.