你有两个选择

1.在所有设备上强制区域设置（和方向）

--***方法1：***带本地化
将flutter_localizations软件包添加到pubspec.yml

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

那么

import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

MaterialApp(
  localizationsDelegates: [
    GlobalCupertinoLocalizations.delegate,
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
  ],
  supportedLocales: [
    Locale("fa", "IR"), // OR Locale('ar', 'AE') OR Other RTL locales
  ],
  locale: Locale("fa", "IR") // OR Locale('ar', 'AE') OR Other RTL locales,
  .
  .
  .
);

--***方法2：***无本地化

MaterialApp(
  .
  .
  .
  builder: (context, child) {
    return Directionality(
      textDirection: TextDirection.rtl,
      child: child,
    );
  },
  .
  .
  .
);

2.根据设备区域设置设置布局方向（如果用户手机区域设置是RTL并且存在于supportedLocales中，则您的应用在RTL模式下运行，否则您的应用为LTR）

将flutter_localizations软件包添加到pubspec.yml

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

那么

import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

MaterialApp(
  localizationsDelegates: [
    GlobalCupertinoLocalizations.delegate,
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
  ],
  supportedLocales: [
    Locale("en", "US"),
    Locale("fa", "IR"), // OR Locale('ar', 'AE') OR Other RTL locales
  ],
  .
  .
  .
);

注：flutter中的rtl语言有：

[
  'ar', // Arabic
  'fa', // Farsi
  'he', // Hebrew
  'ps', // Pashto
  'ur', // Urdu
];

您需要创建一个Builder并使用TextDirection.rtl将布局方向传递给它

new MaterialApp(
          title: 'Flutter RTL',
          color: Colors.grey,
          builder: (BuildContext context, Widget child) {
              return new Directionality(
                textDirection: TextDirection.rtl,
                child: new Builder(
                  builder: (BuildContext context) {
                    return new MediaQuery(
                      data: MediaQuery.of(context).copyWith(
                            textScaleFactor: 1.0,
                          ),
                      child: child,
                    );
                  },
                ),
              );
            },
          .
          .
          .
        );

• • 为整个应用程序设置RTL配置**的最佳和最短方法。

void main() {
  runApp(
    MaterialApp(
      home: Directionality( // add this
        textDirection: TextDirection.rtl, // set this property 
        child: HomePage(),
      ),
    ),
  );
}

如果你需要反向显示文本，那么只需将它的textdirection属性设置为TextDirection.rtl。
TextField小部件的示例代码，

TextField(
  textDirection: TextDirection.rtl,
  decoration: InputDecoration(
    labelText: "Enter Pashto Name",
  ),
),

文本小工具示例代码，

Text(
      "This text is in the other direction!"
      textDirection: TextDirection.rtl,
    ),

只需将此附加到您的素材应用程序即可：

builder: (BuildContext context, Widget child) {
              return new Directionality(
                textDirection: TextDirection.rtl,
                child: new Builder(
                  builder: (BuildContext context) {
                    return new MediaQuery(
                      data: MediaQuery.of(context).copyWith(
                            textScaleFactor: 1.0,
                          ),
                      child: child,
                    );
                  },
                ),
              );
            },

如果使用flutter_localizations：sdk：扑动
添加以下行以更改应用程序方向

supportedLocales: [
    Locale("fa", "IR"), 
    Locale("en", 'US'),
  ],
  locale: Locale("fa", "IR")  // this is important line if not add this Apps will not change direction

第一个月