connectivity偵測網路狀態
判斷當前是Wifi或是一般手機網路

在connectivity 文件裡,有寫到將不會繼續更新, 建議大家轉移到connectivity_plus但基本上用法一樣

在安卓系統上, 不保證是否一定有連上網路
Note that on Android, this does not guarantee connection to Internet.

程式部分 在main.dart裡

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await ConnectivityManager().init();
  await UserDefault().init();
  // await PushNotificationManager.init();
  runApp(MyApp());
}

接著建立ConnectivityManager封裝一次
並在onConnectivityChanged裡面寫handler,
這邊也用到了GetX snackbar 作通知.

class ConnectivityManager {
  final Connectivity _connectivity = Connectivity();
  init() async {
    //App launch check once
    final reslut = await _connectivity.checkConnectivity();
    resultHandler(reslut);

    _connectivity.onConnectivityChanged.listen((result) {
      //At app using, if network changed
      resultHandler(result);
    });
  }

  resultHandler(ConnectivityResult result) {
    if (result == ConnectivityResult.none) {
      Future.delayed(Duration(seconds: 1)).then((value) {
        Get.snackbar(
          "當前狀態無網路",
          "請檢查網路連線",
          duration: Duration(days: 1),
          icon: Icon(Icons.signal_wifi_bad),
        );
      });
    } else {
      if (Get.isSnackbarOpen != null) {
        if (Get.isSnackbarOpen!) Get.back();
      }
    }
  }
}

效果如下

本篇的GitHub source code

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