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The Connectivity service provides device connectivity status and change notifications, allowing you to monitor network connection types.

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Usage

Add the Connectivity service to your page overlay and use its methods to check network connectivity: 
import flet as ft

async def main(page: ft.Page):
    connectivity = ft.Connectivity()
    page.overlay.append(connectivity)
    
    # Get current connectivity
    types = await connectivity.get_connectivity()
    print(f"Connected via: {[t.value for t in types]}")
    
    await page.update_async()

ft.app(main)

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Methods

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get_connectivity()

Returns the current connectivity type(s). 
await connectivity.get_connectivity() -> list[ConnectivityType]
Returns: A list of ConnectivityType enum values representing the current connectivity types. Multiple types can be active simultaneously (e.g., WiFi and VPN). Example: 
types = await connectivity.get_connectivity()

if ft.ConnectivityType.WIFI in types:
    print("Connected to WiFi")
elif ft.ConnectivityType.MOBILE in types:
    print("Connected via mobile data")
elif ft.ConnectivityType.NONE in types:
    print("No internet connection")
else:
    print(f"Connected via: {[t.value for t in types]}")

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Events

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on_change

Called when the network connectivity changes. 
connectivity.on_change = handle_connectivity_change
The event handler receives a ConnectivityChangeEvent with:
  • connectivity (list[ConnectivityType]): Current connectivity type(s)
Example: 
async def handle_connectivity_change(e: ft.ConnectivityChangeEvent):
    if ft.ConnectivityType.NONE in e.connectivity:
        print("Lost internet connection")
        # Show offline message to user
    elif ft.ConnectivityType.WIFI in e.connectivity:
        print("Connected to WiFi")
        # Resume syncing data
    elif ft.ConnectivityType.MOBILE in e.connectivity:
        print("Connected via mobile data")
        # Limit data-heavy operations

connectivity.on_change = handle_connectivity_change

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Enums

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ConnectivityType

Enum representing network connectivity types:
  • BLUETOOTH: Bluetooth connectivity
  • ETHERNET: Ethernet connectivity
  • MOBILE: Mobile data connectivity (3G, 4G, 5G)
  • NONE: No connectivity
  • OTHER: Other connectivity types
  • VPN: VPN connectivity
  • WIFI: Wi-Fi connectivity

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Complete Example

import flet as ft

async def main(page: ft.Page):
    page.title = "Connectivity Monitor"
    
    status_text = ft.Text(size=20)
    connection_icon = ft.Icon(size=50)
    
    connectivity = ft.Connectivity()
    page.overlay.append(connectivity)
    
    def update_ui(types: list[ft.ConnectivityType]):
        if ft.ConnectivityType.NONE in types:
            status_text.value = "No Internet Connection"
            connection_icon.name = ft.icons.SIGNAL_WIFI_OFF
            connection_icon.color = ft.colors.RED
        elif ft.ConnectivityType.WIFI in types:
            status_text.value = "Connected via WiFi"
            connection_icon.name = ft.icons.WIFI
            connection_icon.color = ft.colors.GREEN
        elif ft.ConnectivityType.MOBILE in types:
            status_text.value = "Connected via Mobile Data"
            connection_icon.name = ft.icons.SIGNAL_CELLULAR_ALT
            connection_icon.color = ft.colors.BLUE
        elif ft.ConnectivityType.ETHERNET in types:
            status_text.value = "Connected via Ethernet"
            connection_icon.name = ft.icons.SETTINGS_ETHERNET
            connection_icon.color = ft.colors.GREEN
        else:
            status_text.value = f"Connected: {', '.join([t.value for t in types])}"
            connection_icon.name = ft.icons.NETWORK_CHECK
            connection_icon.color = ft.colors.GREEN
        
        # Check for VPN
        if ft.ConnectivityType.VPN in types:
            status_text.value += " (VPN Active)"
    
    async def check_connectivity_clicked(e):
        types = await connectivity.get_connectivity()
        update_ui(types)
        await page.update_async()
    
    def on_connectivity_change(e: ft.ConnectivityChangeEvent):
        update_ui(e.connectivity)
        page.update()
    
    connectivity.on_change = on_connectivity_change
    
    page.add(
        ft.Column(
            [
                connection_icon,
                status_text,
                ft.ElevatedButton("Check Connection", on_click=check_connectivity_clicked),
            ],
            horizontal_alignment=ft.CrossAxisAlignment.CENTER,
            spacing=20,
        )
    )
    
    # Initial check
    types = await connectivity.get_connectivity()
    update_ui(types)
    await page.update_async()

ft.app(main)

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Use Cases

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Adaptive Content Loading

async def load_content():
    types = await connectivity.get_connectivity()
    
    if ft.ConnectivityType.WIFI in types:
        # Load high-quality images and videos
        await load_high_quality_content()
    elif ft.ConnectivityType.MOBILE in types:
        # Load compressed content to save data
        await load_compressed_content()
    elif ft.ConnectivityType.NONE in types:
        # Show cached content
        show_offline_content()

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Sync Management

def on_connectivity_change(e: ft.ConnectivityChangeEvent):
    if ft.ConnectivityType.NONE in e.connectivity:
        # Pause syncing
        sync_manager.pause()
    elif ft.ConnectivityType.WIFI in e.connectivity:
        # Resume full sync on WiFi
        sync_manager.resume(full=True)
    elif ft.ConnectivityType.MOBILE in e.connectivity:
        # Resume partial sync on mobile data
        sync_manager.resume(full=False)

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Platform Availability

The Connectivity service is available on all platforms:
PlatformSupport
Android✓
iOS✓
macOS✓
Windows✓
Linux✓
Web✓
Note: The available connectivity types may vary depending on the device and platform capabilities.

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