blocks|key|345144|text|也许有一种更优雅的方法来做这件事？但这会解决你眼前的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|345145|有一个不错的小插件来检测键盘可见性这里。那么，您所需要做的就是监听键盘的可见性状态，并在键盘可见时隐藏FAB。|offset|length|345146|示例：|345147|import+'package:flutter/material.dart';
import+'package:keyboard_visibility/keyboard_visibility.dart';

void+main()+=>+runApp(MyApp());

class+MyApp+extends+StatelessWidget+{
++@override
++Widget+build(BuildContext+context)+{
++++return+MaterialApp(
++++++title:+'SO+Demo',
++++++home:+MyHomePage(),
++++);
++}
}

class+MyHomePage+extends+StatefulWidget+{
++@override
++_MyHomePageState+createState()+=>+_MyHomePageState();
}

class+_MyHomePageState+extends+State<MyHomePage>+{
++bool+keyboardOpen+=+false;

++@override
++void+initState()+{
++++super.initState();
++++KeyboardVisibilityNotification().addNewListener(
++++++onChange:+(bool+visible)+{
++++++++setState(()+=>+keyboardOpen+=+visible);
++++++},
++++);
++}

++@override
++Widget+build(BuildContext+context)+{
++++return+Scaffold(
++++++appBar:+AppBar(
++++++++title:+Text('Sample+Code'),
++++++),
++++++body:+ListView(
++++++++padding:+const+EdgeInsets.all(20.0),
++++++++children:+<Widget>[
++++++++++TextField(decoration:+InputDecoration(labelText:+"Text")),
++++++++++TextField(decoration:+InputDecoration(labelText:+"Text")),
++++++++++TextField(decoration:+InputDecoration(labelText:+"Text")),
++++++++],
++++++),
++++++bottomNavigationBar:+BottomAppBar(
++++++++child:+Container(height:+50.0),
++++++),
++++++floatingActionButton:+keyboardOpen
++++++++++?+SizedBox()
++++++++++:+FloatingActionButton(
++++++++++++++onPressed:+()+{},
++++++++++++++child:+Icon(Icons.add),
++++++++++++),
++++++floatingActionButtonLocation:+FloatingActionButtonLocation.centerDocked,
++++);
++}
}|code-block|syntax|javascript|345148|entityMap|0|LINK|mutability|MUTABLE|url|https://pub.dev/packages/keyboard_visibility^0|0|H|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

Maybe there's a more elegant way of doing this? but this will solve your immediate problem.

There's a nice little plugin to detect the keyboard visibility <a href="https://pub.dev/packages/keyboard_visibility" rel="nofollow noreferrer">here</a>.
All you need to do then is to listen to the keyboard visibility state and hide the FAB when the keyboard is visible.

Sample:

<pre><code>import 'package:flutter/material.dart';
import 'package:keyboard_visibility/keyboard_visibility.dart';

void main() =&gt; runApp(MyApp());

class MyApp extends StatelessWidget {
 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 title: 'SO Demo',
 home: MyHomePage(),
 );
 }
}

class MyHomePage extends StatefulWidget {
 @override
 _MyHomePageState createState() =&gt; _MyHomePageState();
}

class _MyHomePageState extends State&lt;MyHomePage&gt; {
 bool keyboardOpen = false;

 @override
 void initState() {
 super.initState();
 KeyboardVisibilityNotification().addNewListener(
 onChange: (bool visible) {
 setState(() =&gt; keyboardOpen = visible);
 },
 );
 }

 @override
 Widget build(BuildContext context) {
 return Scaffold(
 appBar: AppBar(
 title: Text('Sample Code'),
 ),
 body: ListView(
 padding: const EdgeInsets.all(20.0),
 children: &lt;Widget&gt;[
 TextField(decoration: InputDecoration(labelText: "Text")),
 TextField(decoration: InputDecoration(labelText: "Text")),
 TextField(decoration: InputDecoration(labelText: "Text")),
 ],
 ),
 bottomNavigationBar: BottomAppBar(
 child: Container(height: 50.0),
 ),
 floatingActionButton: keyboardOpen
 ? SizedBox()
 : FloatingActionButton(
 onPressed: () {},
 child: Icon(Icons.add),
 ),
 floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
 );
 }
}

</code></pre>

blocks|key|1160665|text|将浮动动作按钮包装在positioned+widget中对我不起作用。但是，结合添加Scaffold的属性|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1160666|resizeToAvoidBottomPadding:假的，|1160667|您还可以使用SingleChildScrollView小部件和使用MediaQuery.of方法的填充.|1160668|return+Scaffold(
++resizeToAvoidBottomInset:+false,
++backgroundColor:+Colors.lightBlueAccent,
++floatingActionButton:+FloatingActionButton(
++++backgroundColor:+Colors.lightBlueAccent,
++++child:+Icon(Icons.add),
++++onPressed:+()+{
++++++showModalBottomSheet(
++++++++++context:+context,
++++++++++isScrollControlled:+true,
++++++++++builder:+(context)+=>+SingleChildScrollView(
++++++++++++++child:+Container(
++++++++++++++++++padding:+EdgeInsets.only(bottom:+MediaQuery.of(context).viewInsets.bottom),
++++++++++++++++++child:+AddTaskScreen())),
++++++++++backgroundColor:+Colors.transparent);
++++},
++),|code-block|syntax|javascript|1160669|entityMap^0|A|H|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|U|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|V|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Wrapping the floating action button inside a <code>positioned widget</code> did not work for me. However, in combination to adding in your Scaffold the property
resizeToAvoidBottomPadding: false,
You can also use the SingleChildScrollView widget with padding using the MediaQuery.of method...
<pre><code>return Scaffold(
 resizeToAvoidBottomInset: false,
 backgroundColor: Colors.lightBlueAccent,
 floatingActionButton: FloatingActionButton(
 backgroundColor: Colors.lightBlueAccent,
 child: Icon(Icons.add),
 onPressed: () {
 showModalBottomSheet(
 context: context,
 isScrollControlled: true,
 builder: (context) =&gt; SingleChildScrollView(
 child: Container(
 padding: EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
 child: AddTaskScreen())),
 backgroundColor: Colors.transparent);
 },
 ),
</code></pre>

blocks|key|345224|text|只需使用Scaffold内部的属性resizeToAvoidBottomInset:+false|type|unstyled|depth|inlineStyleRanges|entityRanges|data|345225|它将立即解决这个问题。|345226|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Just use the property inside Scaffold
resizeToAvoidBottomInset: false
It will solve the problem immediately..

I have the following code:

<pre><code>return Scaffold(
 appBar: AppBar(
 title: Text('Sample Code'),
 ),
 body: ListView(
 padding: const EdgeInsets.all(20.0),
 children: &lt;Widget&gt;[
 TextField(
 decoration: InputDecoration(labelText: "Text"),
 ),
 TextField(
 decoration: InputDecoration(labelText: "Text"),
 ),
 TextField(
 decoration: InputDecoration(labelText: "Text"),
 ),
 ],
 ),
 bottomNavigationBar: BottomAppBar(
 child: Container(
 height: 50.0,
 ),
 ),
 floatingActionButton: FloatingActionButton(
 onPressed: () {},
 child: Icon(Icons.add),
 ),
 floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
 );
</code></pre>

Whenever the keyboard shows up to enter text into a <code>TextField</code> the <code>FloatingActionButton</code> moves up to the top of the keyboard which will look like this:

<a href="https://i.stack.imgur.com/R3qQY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/R3qQY.png" alt="FloatingActionButton"></a>

What I want is that the button stays in the bottom navigation bar and does not move when the keyboard shows up. I added <code>resizeToAvoidBottomPadding: false,</code> to the <code>Scaffold</code>, which prevents the button from moving but also stops my <code>ListView</code> from moving to stay visible when the keyboard shows up.

Flutter: Floating action button fixed location

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有以下代码：return Scaffold(      appBar: AppBar(        title: Text('Sample Code'),      ),      body: ListView(        padding: const EdgeInsets.all(20.0),        ...

问颤振:浮动动作按钮固定位置
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问颤振:浮动动作按钮固定位置EN