Flutter获取GSM信息插件gsm_info的使用

gsm_info

gsm_info 是一个用于在 Flutter 应用中获取当前 Android 设备 GSM 信号强度的插件。该插件仅适用于 Android 平台，并且需要 ACCESS_FINE_LOCATION 权限。

安装

在 pubspec.yaml 文件中添加 gsm_info 作为依赖项：

dependencies:
  gsm_info: [version]

替换 [version] 为插件的最新版本号。

使用

首先导入 gsm_info 包：

import 'package:gsm_info/gsm_info.dart';

然后，可以通过以下方式获取 GSM 信号强度：

final signalStrength = await GsmInfo.gsmSignalDbM;

完整的示例代码如下：

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

import 'package:flutter/services.dart';
import 'package:gsm_info/gsm_info.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int _platformVersion = 0;

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
  }

  // 异步平台消息初始化
  Future<void> initPlatformState() async {
    int platformVersion = 0;
    
    // 处理可能抛出的 PlatformException
    try {
      platformVersion = await GsmInfo.gsmSignalDbM;
    } on PlatformException {
      platformVersion = -999; // 错误处理
    }

    // 如果组件被移除，忽略回调
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('GSM信号强度插件示例'),
        ),
        body: Center(
          child: Text('运行在: $_platformVersion\n'),
        ),
      ),
    );
  }
}

更多关于Flutter获取GSM信息插件gsm_info的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

sinazl 1楼•5 天前

更多关于Flutter获取GSM信息插件gsm_info的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

当然，以下是如何在Flutter项目中使用gsm_info插件来获取GSM信息的代码示例。这个插件允许你访问设备的SIM卡信息，比如运营商名称、国家代码、移动网络代码等。

首先，确保你已经在pubspec.yaml文件中添加了gsm_info依赖：

dependencies:
  flutter:
    sdk: flutter
  gsm_info: ^latest_version  # 请替换为最新版本号

然后，运行flutter pub get来安装依赖。

接下来，你可以在你的Flutter项目中使用gsm_info插件。以下是一个完整的示例代码，展示如何获取并显示GSM信息：

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String? carrierName;
  String? countryCode;
  String? mobileNetworkCode;
  String? simSerialNumber;
  String? line1Number;
  String? integratedCircuitCardIdentifier;
  String? internationalMobileSubscriberIdentity;
  String? subscriberIdentityModuleNumber;
  String? voiceMailNumber;
  bool isSimPresent = false;
  bool isSimReady = false;

  @override
  void initState() {
    super.initState();
    _initGsmInfo();
  }

  Future<void> _initGsmInfo() async {
    final GsmInfo gsmInfo = GsmInfo();

    // 监听SIM卡状态变化
    gsmInfo.simStateChanged.listen((simState) {
      setState(() {
        isSimPresent = simState.isPresent;
        isSimReady = simState.isReady;
      });
    });

    // 获取SIM卡信息
    try {
      final SimCardInfo simCardInfo = await gsmInfo.simCardInfo;
      setState(() {
        carrierName = simCardInfo.carrierName;
        countryCode = simCardInfo.countryCode.toString();
        mobileNetworkCode = simCardInfo.mobileNetworkCode.toString();
        simSerialNumber = simCardInfo.simSerialNumber;
        line1Number = simCardInfo.line1Number;
        integratedCircuitCardIdentifier = simCardInfo.integratedCircuitCardIdentifier;
        internationalMobileSubscriberIdentity = simCardInfo.internationalMobileSubscriberIdentity;
        subscriberIdentityModuleNumber = simCardInfo.subscriberIdentityModuleNumber;
        voiceMailNumber = simCardInfo.voiceMailNumber;
      });
    } catch (e) {
      print('Error getting SIM card info: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('GSM Info Example'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text('Is SIM Present: $isSimPresent'),
              SizedBox(height: 16),
              Text('Is SIM Ready: $isSimReady'),
              SizedBox(height: 16),
              if (carrierName != null) Text('Carrier Name: $carrierName'),
              SizedBox(height: 8),
              if (countryCode != null) Text('Country Code: $countryCode'),
              SizedBox(height: 8),
              if (mobileNetworkCode != null) Text('Mobile Network Code: $mobileNetworkCode'),
              SizedBox(height: 8),
              if (simSerialNumber != null) Text('SIM Serial Number: $simSerialNumber'),
              SizedBox(height: 8),
              if (line1Number != null) Text('Line 1 Number: $line1Number'),
              SizedBox(height: 8),
              if (integratedCircuitCardIdentifier != null) Text('ICCID: $integratedCircuitCardIdentifier'),
              SizedBox(height: 8),
              if (internationalMobileSubscriberIdentity != null) Text('IMSI: $internationalMobileSubscriberIdentity'),
              SizedBox(height: 8),
              if (subscriberIdentityModuleNumber != null) Text('SIM Number (SMN): $subscriberIdentityModuleNumber'),
              SizedBox(height: 8),
              if (voiceMailNumber != null) Text('Voice Mail Number: $voiceMailNumber'),
            ],
          ),
        ),
      ),
    );
  }
}

这个示例代码创建了一个Flutter应用，它使用gsm_info插件来获取并显示SIM卡的相关信息。这些信息包括运营商名称、国家代码、移动网络代码等。代码还监听了SIM卡状态的变化，并更新了UI以反映SIM卡是否存在以及是否就绪。

请注意，某些信息（如line1Number）可能因设备和运营商的不同而无法获取。此外，某些信息可能需要额外的权限，这取决于设备和操作系统版本。