Check Internet connection

robife · Mar 24, 2013

Hi guys
I need help to check internet connection is ON or OFF

I try eks.

B4X:

    If CheckConnection Then
           Msgbox("You connected internet", "OK")
    Else
           Msgbox("You didn't connect internet", "Error")
    End If


Sub CheckConnection As Boolean
    Dim p As Phone
    
    If (p.GetDataState == "CONNECTED") Then
        Return True
    End If
        
    If (p.GetSettings ("wifi_on") == 1) Then
        Return True
    End If
    
    If (p.GetDataState == "DISCONNECTED") Then
        Return False
    End If
    
    If (p.GetDataState == "SUSPENDED") Then
        Return False
    End If
End Sub

But how to do it on application with label text ?

or Only to show msg when Internt is OFF, not each time we start app

sam_madinah · Sep 29, 2019

Derek Johnson said:
I've just tested this simple alternative and it seems to work OK for me:

B4X:

Sub Connected As Boolean 'Requires Phone Library Dim p As Phone Dim Response, Error As StringBuilder Response.Initialize Error.Initialize 'Ping Google DNS - if you can't reach this you are in serious trouble! p.Shell("ping -c 1 8.8.8.8",Null,Response,Error) Log("======= Response ========") Log(Response) Log("======= Error ===========") Log(Error) Log("======================") If Error.ToString="" Then Return True Else Return False End If End Sub

I'm not sure if all devices allow the use of the shell command. It worked on my non-rooted Moto G.
I tested in with Aeroplane mode ON and OFF.

Derek

getting this

1 packets transmitted, 0 received, 100% packet loss, time 0ms

in Response

so I guess will look for another solution

Derek Johnson · Sep 30, 2019

sam_madinah said:
getting this

1 packets transmitted, 0 received, 100% packet loss, time 0ms

in Response

so I guess will look for another solution

Could you let me know what device is giving this problem and what version of Android is it running on please?

sam_madinah · Sep 30, 2019

Derek Johnson said:
Could you let me know what device is giving this problem and what version of Android is it running on please?

the setup :
I enabled wifi hotspot in my laptop with win 10 ,, my mobile is connected to that wifi,, my laptop is connected to internet via network cable
in this setup,it works well,
then I removed the network cable from laptop,, my mobile is still connected to the wifi (but ofcource the laptop has no internet)
then I got that message

using Samsung note 8 , with Android V9 ,, using b4a 9.5

imo , my mobile did send the packets with no error, but they got dropped somewhere (my laptop in this case, could be any node like router , modem , access point , etc)

Derek Johnson · Sep 30, 2019

sam_madinah said:
the setup :
I enabled wifi hotspot in my laptop with win 10 ,, my mobile is connected to that wifi,, my laptop is connected to internet via network cable
in this setup,it works well,
then I removed the network cable from laptop,, my mobile is still connected to the wifi (but ofcource the laptop has no internet)
then I got that message

using Samsung note 8 , with Android V9 ,, using b4a 9.5

imo , my mobile did send the packets with no error, but they got dropped somewhere (my laptop in this case, could be any node like router , modem , access point , etc)

So what is the problem? You don't have Internet Access from your device, and that is what the function is telling you. You can't ping Google because there is no Internet connection.

sam_madinah · Oct 1, 2019

Derek Johnson said:
So what is the problem?

the code checking
if Error.ToString=""
and in that case
Error.ToString="" = True
and the sub Connected returned True while I am not connected

thats why I wrote
(so I guess will look for another solution)

Derek Johnson · Oct 1, 2019

sam_madinah said:
the code checking
if Error.ToString=""
and in that case
Error.ToString="" = True
and the sub Connected returned True while I am not connected

thats why I wrote
(so I guess will look for another solution)

I can't understand how the code can decide that the error string is empty when there is an error message.

Erel · Oct 2, 2019

This is an old thread. Please start a new thread for further discussion.

Check Internet connection

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