一.前言

App开发中，在调用后台接口时可能需要通过设备的信息来生成鉴权,或者设备的异常登录检测，这个时候就需要获取设备的信息，那么我们如何在Flutter应用程序获取设备信息呢？.

二.获取平台信息

在前两天Google的IO大会上，已经公开Flutter时全平台框架，可以在多种平台上运行，如：Linux,mac,android,windows,ios,获取设备信息前首先要确定我们的程序运行在哪一种平台之上,判断平台我们可以通过，dart.io包下的Platform类来获取.

Platform类下的代码：

  /**
   * Whether the operating system is a version of
   * [Linux](https://en.wikipedia.org/wiki/Linux).
   *
   * This value is `false` if the operating system is a specialized
   * version of Linux that identifies itself by a different name,
   * for example Android (see [isAndroid]).
   */
  static final bool isLinux = (_operatingSystem == "linux");

  /**
   * Whether the operating system is a version of
   * [macOS](https://en.wikipedia.org/wiki/MacOS).
   */
  static final bool isMacOS = (_operatingSystem == "macos");

  /**
   * Whether the operating system is a version of
   * [Microsoft Windows](https://en.wikipedia.org/wiki/Microsoft_Windows).
   */
  static final bool isWindows = (_operatingSystem == "windows");

  /**
   * Whether the operating system is a version of
   * [Android](https://en.wikipedia.org/wiki/Android_%28operating_system%29).
   */
  static final bool isAndroid = (_operatingSystem == "android");

  /**
   * Whether the operating system is a version of
   * [iOS](https://en.wikipedia.org/wiki/IOS).
   */
  static final bool isIOS = (_operatingSystem == "ios");

  /**
   * Whether the operating system is a version of
   * [Fuchsia](https://en.wikipedia.org/wiki/Google_Fuchsia).
   */
  static final bool isFuchsia = (_operatingSystem == "fuchsia");

使用

1.导入io包

import 'dart:io';

2.使用

if(Platform.isIOS){
  //ios相关代码
  print('IOS设备：');
}else if(Platform.isAndroid)
  //android相关代码
  print('Android设备');
}

三.获取设备信息

判断平台完平台之后，我们接着来获取设备信息，获取设备信息，我们通过依赖第三方的库device_info

使用

1项目的.pubspec.yaml文件中添加依赖

dependencies:
  device_info : ^0.2.0

2.安装下载依赖包

flutter packages get

3.导入device_info.dart：

import 'package:device_info/device_info.dart';

4.获取Android和IOS的设备信息

  void getDeviceInfo() async{
    DeviceInfoPlugin deviceInfo = new DeviceInfoPlugin();
    if(Platform.isIOS){
      print('IOS设备：');
      IosDeviceInfo iosInfo = await deviceInfo.iosInfo;
    }else if(Platform.isAndroid){
      print('Android设备');
      AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
    }
  }

IOS设备属性(取自IosDeviceInfo 类)

class IosDeviceInfo {
  IosDeviceInfo._({
    this.name,
    this.systemName,
    this.systemVersion,
    this.model,
    this.localizedModel,
    this.identifierForVendor,
    this.isPhysicalDevice,
    this.utsname,
  });
}

Android设备属性(取自AndroidDeviceInfo类)

class AndroidDeviceInfo {
  AndroidDeviceInfo._({
    this.version,
    this.board,
    this.bootloader,
    this.brand,
    this.device,
    this.display,
    this.fingerprint,
    this.hardware,
    this.host,
    this.id,
    this.manufacturer,
    this.model,
    this.product,
    List<String> supported32BitAbis,
    List<String> supported64BitAbis,
    List<String> supportedAbis,
    this.tags,
    this.type,
    this.isPhysicalDevice,
  })  : supported32BitAbis = new List<String>.unmodifiable(supported32BitAbis),
        supported64BitAbis = new List<String>.unmodifiable(supported64BitAbis),
        supportedAbis = new List<String>.unmodifiable(supportedAbis);

  /// Android operating system version values derived from `android.os.Build.VERSION`.
  final AndroidBuildVersion version;

  /// The name of the underlying board, like "goldfish".
  final String board;

  /// The system bootloader version number.
  final String bootloader;

  /// The consumer-visible brand with which the product/hardware will be associated, if any.
  final String brand;

  /// The name of the industrial design.
  final String device;

  /// A build ID string meant for displaying to the user.
  final String display;

  /// A string that uniquely identifies this build.
  final String fingerprint;

  /// The name of the hardware (from the kernel command line or /proc).
  final String hardware;

  /// Hostname.
  final String host;

  /// Either a changelist number, or a label like "M4-rc20".
  final String id;

  /// The manufacturer of the product/hardware.
  final String manufacturer;

  /// The end-user-visible name for the end product.
  final String model;

  /// The name of the overall product.
  final String product;

  /// An ordered list of 32 bit ABIs supported by this device.
  final List<String> supported32BitAbis;

  /// An ordered list of 64 bit ABIs supported by this device.
  final List<String> supported64BitAbis;

  /// An ordered list of ABIs supported by this device.
  final List<String> supportedAbis;

  /// Comma-separated tags describing the build, like "unsigned,debug".
  final String tags;

  /// The type of build, like "user" or "eng".
  final String type;

  /// `false` if the application is running in an emulator, `true` otherwise.
  final bool isPhysicalDevice;
}

四.总结

关于Flutter获取设备信息的文章，在各个平台上都有类似的文章，也是通过学习前辈们的知识，发布出来仅仅作为笔记，如有错误之处请指点.