你可以这样做

defaultTargetPlatform == TargetPlatform.iOS
          ? kIOSTheme
          : kDefaultTheme,

从导入'包:flutter/foundation.dart';

你可以这样做

defaultTargetPlatform == TargetPlatform.iOS
          ? kIOSTheme
          : kDefaultTheme,

从导入'包:flutter/foundation.dart';

您可以将这个扩展文件(platform_ext.dart)添加到项目中并调用任何对象

import 'dart:io';
import 'package:flutter/foundation.dart' show kIsWeb;

extension Target on Object {
  bool isAndroid() {
    return Platform.isAndroid;
  } 
  bool isIOS() {
    return Platform.isIOS;
  } 
  bool isLinux() {
  return Platform.isLinux;
  } 
  bool isWindows() {
  return Platform.isWindows; 
  }
  bool isMacOS() {
  return Platform.isMacOS; 
  }
  bool isWeb() {
  return kIsWeb; 
  }
  // ···
}

只需导入文件并调用它

   import 'platform_ext.dart';
        ....
        @override
          Widget build(BuildContext context) {
            return isAndroid()? Text("Android"):Text("Not Android");
          }

为更简单的方式为网络和应用程序。试试这个

import 'dart:io' show Platform;
import 'package:flutter/foundation.dart' show kIsWeb;


var platformName = '';
if (kIsWeb) {
  platformName = "Web";
} else {
  if (Platform.isAndroid) {
    platformName = "Android";
  } else if (Platform.isIOS) {
    platformName = "IOS";
  } else if (Platform.isFuchsia) {
    platformName = "Fuchsia";
  } else if (Platform.isLinux) {
    platformName = "Linux";
  } else if (Platform.isMacOS) {
    platformName = "MacOS";
  } else if (Platform.isWindows) {
    platformName = "Windows";
  }
}
print("platformName :- "+platformName.toString());

import 'dart:io' as io;

if(io.Platform.isAndroid){
 doSomething();
}else {
 doSomethingElse();
}

Dart主机平台检查。

导入'dart:io'作为io;

_checkingHostPlatform(){
    if(IO.Platform.isAndroid){
      //Execute code for android
    }else if(IO.Platform.isIOS){
      //Execute code for iOS
    }else{
      //Execute code for other platforms
    }
  }