在 Flutter 中使用 OrientationBuilder 打开键盘时如何避免方向更改？

Question

how to avoid orientation changes when keyboard is opened with OrientationBuilder in Flutter?

Indeed when the keyboard appears the orientation property of OrientationBuilder changes to landscape even if we don't rotate the phone.

Image:

Code:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          body: OrientationBuilder(builder: (context, orientation) {
            var _children = [
              Expanded(
                  child: Center(
                      child: Text('Orientation : $orientation',
                          textAlign: TextAlign.center))),
              Flexible(
                  child: Container(color: Colors.blue, child: TextField())),
              Flexible(child: Container(color: Colors.yellow)),
            ];
            if (orientation == Orientation.portrait) {
              return Column(
                  mainAxisAlignment: MainAxisAlignment.spaceAround,
                  children: _children);
            } else {
              return Row(
                  mainAxisAlignment: MainAxisAlignment.spaceAround,
                  children: _children);
            }
          })),
    );
  }
}

Answer 1

How to avoid orientation changes when keyboard is opened with OrientationBuilder, set resizeToAvoidBottomInset to false in Scaffold widget;

Image:

Code:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          resizeToAvoidBottomInset: false, // Here
          body: SafeArea(
            child: Padding(
              padding: const EdgeInsets.all(20.0),
              child: OrientationBuilder(builder: (context, orientation) {
                return Column(
                  children: [
                    Text('Orientation = $orientation',
                        style: TextStyle(
                            fontSize: 20, fontWeight: FontWeight.bold)),
                    TextField(
                      decoration: InputDecoration(
                        hintText: 'tap me',
                      ),
                    )
                  ],
                );
              }),
            ),
          )),
    );
  }
}