Connective

Introduction

Nylo Website provides connectivity-aware widgets and utilities to help you build apps that respond to network changes. The Connective widget automatically rebuilds when connectivity changes, while the NyConnectivity helper provides static methods for checking connection status.

Connective Widget

The Connective widget listens to connectivity changes and rebuilds based on the current network state.

State-Based Builders

Provide different widgets for each connection type:

Connective(
  onWifi: Text('Connected via WiFi'),
  onMobile: Text('Connected via Mobile Data'),
  onNone: Column(
    mainAxisAlignment: MainAxisAlignment.center,
    children: [
      Icon(Icons.wifi_off, size: 64),
      Text('No internet connection'),
    ],
  ),
  child: Text('Connected'), // Default for unspecified states
)

Available States

Custom Builder

Use Connective.builder for full control over the UI:

Connective.builder(
  builder: (context, state, results) {
    if (state == NyConnectivityState.none) {
      return Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(Icons.cloud_off, size: 64, color: Colors.grey),
            SizedBox(height: 16),
            Text('You are offline'),
            ElevatedButton(
              onPressed: () => Navigator.pop(context),
              child: Text('Go Back'),
            ),
          ],
        ),
      );
    }

    // Show connection type
    return Text('Connected via: ${state.name}');
  },
)

The builder receives:

• context - BuildContext
• state - NyConnectivityState enum (wifi, mobile, ethernet, vpn, bluetooth, other, none)
• results - List<ConnectivityResult> for checking multiple connections

Listening to Changes

Use onConnectivityChanged to react when connectivity changes:

Connective(
  onConnectivityChanged: (state, results) {
    if (state == NyConnectivityState.none) {
      showSnackbar('You went offline');
    } else {
      showSnackbar('Back online!');
    }
  },
  child: MyContent(),
)

OfflineBanner Widget

Display a banner at the top of the screen when offline:

Scaffold(
  body: Stack(
    children: [
      // Your main content
      MyPageContent(),

      // Offline banner (auto-hides when online)
      OfflineBanner(),
    ],
  ),
)

Customizing the Banner

OfflineBanner(
  message: 'Check your connection',
  backgroundColor: Colors.orange,
  textColor: Colors.white,
  icon: Icons.signal_wifi_off,
  height: 50,
  animate: true, // Slide in/out animation
  animationDuration: Duration(milliseconds: 200),
)

NyConnectivity Helper

The NyConnectivity class provides static methods for checking connectivity:

Check if Online/Offline

if (await NyConnectivity.isOnline()) {
  // Make API request
  final data = await api.fetchData();
} else {
  // Load from cache
  final data = await cache.getData();
}

// Or check if offline
if (await NyConnectivity.isOffline()) {
  showOfflineMessage();
}

Check Specific Connection Types

if (await NyConnectivity.isWifi()) {
  // Download large files on WiFi
  await downloadLargeFile();
}

if (await NyConnectivity.isMobile()) {
  // Warn about data usage
  showDataWarning();
}

// Other methods:
await NyConnectivity.isEthernet();
await NyConnectivity.isVpn();
await NyConnectivity.isBluetooth();

Get Current Status

// Get all active connection types
List<ConnectivityResult> results = await NyConnectivity.status();

if (results.contains(ConnectivityResult.wifi)) {
  print('WiFi is active');
}

// Get human-readable string
String type = await NyConnectivity.connectionTypeString();
print('Connected via: $type'); // "WiFi", "Mobile", "None", etc.

Listen to Changes

StreamSubscription subscription = NyConnectivity.stream().listen((results) {
  if (results.contains(ConnectivityResult.none)) {
    showOfflineUI();
  } else {
    showOnlineUI();
  }
});

// Don't forget to cancel when done
@override
void dispose() {
  subscription.cancel();
  super.dispose();
}

Conditional Execution

// Execute only when online (returns null if offline)
final data = await NyConnectivity.whenOnline(() async {
  return await api.fetchData();
});

if (data == null) {
  showOfflineMessage();
}

// Execute different callbacks based on status
final result = await NyConnectivity.when(
  online: () async => await api.fetchData(),
  offline: () async => await cache.getData(),
);

Widget Extensions

Quickly add connectivity awareness to any widget:

Show Offline Alternative

// Show a different widget when offline
MyContent().connectiveOr(
  offline: Text('Content unavailable offline'),
)

Only Show When Online

// Hide completely when offline
SyncButton().onlyOnline()

Only Show When Offline

// Show only when offline
OfflineMessage().onlyOffline()

Parameters

Connective

OfflineBanner

NyConnectivityState Enum