I need to make a simple callback in Xamarin, to check if the network status is connected or disconnected.
I have so far been doing it with this code:
class NetworkControl : INetworkControl
{
private readonly INetworkControl.ICallback _callback;
private readonly Context _context;
private readonly NetworkBroadcastReceiver _receiver = new NetworkBroadcastReceiver();
public NetworkControl(INetworkControl.ICallback callback, Context context)
{
_callback = callback;
_context = context;
IntentFilter filter = new IntentFilter(ConnectivityManager.ConnectivityAction);
context.RegisterReceiver(_receiver, filter);
}
public INetworkControl.ICallback Callback => _callback;
public INetworkControl.NetworkStatus Status
{
get
{
var current = Connectivity.NetworkAccess;
if (current == NetworkAccess.Internet)
{
return INetworkControl.NetworkStatus.Connected;
}
return INetworkControl.NetworkStatus.Disconnected;
}
}
}
class NetworkBroadcastReceiver : BroadcastReceiver
{
private static String TAG = "NetworkBroadcastReceiver";
public override void OnReceive(Context context, Intent intent)
{
if (ShellBridge.Instance != null)
{
if (intent.Action.Equals(ConnectivityManager.ConnectivityAction))
{
NetworkInfo ni = (NetworkInfo)intent.Extras.Get(ConnectivityManager.ExtraNetworkInfo);
if (ni.isConnected)
{
// do something if connected
ShellBridge.Instance.NetworkBridge.Callback.NetworkStatusChanged(INetworkControl.NetworkStatus.Connected);
} else
{
ShellBridge.Instance.NetworkBridge.Callback.NetworkStatusChanged(INetworkControl.NetworkStatus.Connected);
}
}
}
}
The problem is, the function ConnectivityManager.ConnectivityAction in the Intent creating is depricated, and will soon be obsolete. After searching, I found that the pendingIntent should be used for that, but I could not find any valid example of how to use it.
The closest to what I need is this:
https://stackoverflow.com/questions/58588132/how-to-use-registernetworkcallback-with-pendingintent
But, it has not all the information I need. I need it to be all programmatically, without changing the manifest, for, my app should be a fore- and background app.
Please help, and thank you for your time.
You can take a look at NetworkCallback .
public class ConnectionStateMonitor : NetworkCallback
{
NetworkRequest networkRequest;
public ConnectionStateMonitor()
{
networkRequest = new NetworkRequest.Builder().
AddTransportType(TransportType.Cellular).
AddTransportType(TransportType.Wifi).Build();
}
public void enable(Context context) {
ConnectivityManager connectivityManager = context.GetSystemService(Context.ConnectivityService) as ConnectivityManager;
connectivityManager.RegisterNetworkCallback(networkRequest, this);
}
public override void OnAvailable(Network network)
{
//network available
}
public override void OnLost(Network network)
{
//network lost
}
}
You just need to instantiate the class ConnectionStateMonitor and enable it , you could detect the network status with the method OnAvailable and OnLost .
ConnectionStateMonitor m = new ConnectionStateMonitor ();
m.enable(context);
Refer