Android Question Checking internet connection

[ciginfo]

Hello,
In 2024 What is the best way to check internet connection (wifi, 4G) when application starts.

Thanks you

 

[Sergio Haurat]

In B4XPage, I found these two ways to detect if there is an Internet connection. The problem, both are only for Android. "PhoneEvents" does not exist in the internal iPhone library or possibly I did not find it

Sub Class_Globals
    Private pEvents As PhoneEvents
End Sub

Public Sub Initialize
  pEvents.Initialize("PhoneStatus")
End Sub

Private Sub PhoneStatus_ConnectivityChanged (NetworkType As String, State As String, Intent As Intent)
    If State = "CONNECTED" Then
        'Code
    Else If State <> "CONNECTED" Then
        'Code
    End If
End Sub

This library

[B4A] - AH_CheckInternet - Check network status (Library)

Hi all, With this library you will have the following possibility. Currently version v1.5 (2021/05/23) 1️. Check the status of the airplane mode 2. Check internet connection status 3. Check the roaming status of the device 4. Check VPN connection status 5. Check Data State status 6. Get the...

www.b4x.com

 

[PoppaBart]

In B4XPage, I found these two ways to detect if there is an Internet connection. The problem, both are only for Android. "PhoneEvents" does not exist in the internal iPhone library or possibly I did not find it

Sub Class_Globals
    Private pEvents As PhoneEvents
End Sub

Public Sub Initialize
  pEvents.Initialize("PhoneStatus")
End Sub

Private Sub PhoneStatus_ConnectivityChanged (NetworkType As String, State As String, Intent As Intent)
    If State = "CONNECTED" Then
        'Code
    Else If State <> "CONNECTED" Then
        'Code
    End If
End Sub

This library

[B4A] - AH_CheckInternet - Check network status (Library)

Hi all, With this library you will have the following possibility. Currently version v1.5 (2021/05/23) 1️. Check the status of the airplane mode 2. Check internet connection status 3. Check the roaming status of the device 4. Check VPN connection status 5. Check Data State status 6. Get the...

www.b4x.com

Try WaitForInternet

WaitForInternet - Best way to check the internet connection

This library was inspired and based on WaitForTheInternet by César Pérez https://github.com/ouvigna/WaitForTheInternet Your application will be able to get through an event, as it connects to the internet via Wifi or 3G, without the need to be checking all the time, not consuming battery...

www.b4x.com

 

[Erel]

In many cases the best approach is simply to try to connect to the server you need and if it fails then show a message to the user.

 

[Sergio Haurat]

In many cases the best approach is simply to try to connect to the server you need and if it fails then show a message to the user.

Thanks for your comment, I understand that you are referring to a "try/catch" using, for example, this code: https://www.b4x.com/android/forum/threads/b4x-okhttputils2-with-wait-for.79345/

I found ping on iPhone. To test it, I would do it to Google's DNS 8.8.8.8. I didn't see Ping example on Android.

iPing - Send and receive ping (ICMP) packets

This library wraps Apple's code: https://developer.apple.com/library/archive/samplecode/SimplePing/Introduction/Intro.html Usage example: Sub Class_Globals Private Root As B4XView Private xui As XUI Private Pinger As SimplePing End Sub Public Sub Initialize End Sub Private Sub...

www.b4x.com

You don't always need to connect to a server.

 

[TILogistic]

In many cases the best approach is simply to try to connect to the server you need and if it fails then show a message to the user.

Other alternatives which I use in my apps.
which has the possibility of checking other ports.
Lib: Network, JNetwork y iNetwork
Test in B4A and B4J

    Wait For (Ping("google.com", 80)) Complete (Status As Boolean)
    Log(Status)
   
    Wait For (Ping("172.66.43.61", 80)) Complete (Status As Boolean) 'cnn.com
    Log(Status)
   
    Wait For (Ping("cnn.com", 80)) Complete (Status As Boolean) 'cnn.com
    Log(Status)
   
    Wait For (Ping("localhost", 80)) Complete (Status As Boolean)
    Log(Status)

Public Sub Ping(Host As String, Port As Int) As ResumableSub
    Dim Socket As Socket
    Socket.Initialize("Socket")
    Socket.Connect(Host, Port, 60 * DateTime.TicksPerSecond)
    Wait For Socket_Connected (Successful As Boolean)
    Return Successful
End Sub