Android Question Use Wait for JobeDone for check net

devmobile said:

Hi
I use Waiting For JobDone for check internet status
Acctually i download file and if jobdone is successfully so intertnet is active and not downloaded so internet is disactive
And set timeout for download
Is it good way for check internet?

Click to expand...

ilan said:

Yuu could also use a webview and load google.com if succeful then phone is connected if not then not...

There are less chances that google.com will fail then a file in your server

Click to expand...

devmobile said:

It is complex

Click to expand...

Erel said:

WebView is not needed here.

B4X:

   Dim j As HttpJob
   j.Initialize("", Me)
   j.Download("https://www.google.com") 'or better the link that you want to access
   Wait For (j) JobDone(j As HttpJob)
   If j.Success Then
     'there is an internet connection
   End If
   j.Release

Click to expand...

    Dim webview1 As WebView
    webview1.Initialize("webview1")
    webview1.LoadUrl("http://www.google.com")


Sub webview1_PageFinished (Success As Boolean, Url As String)
    If Success Then
        Log("there is internet connection")
    Else
        Log("No internet connection)  
    End If
End Sub

Peter Simpson said:

I personally use MLWifi when managing my WiFi networks, I then use WiFiNetworks.isOnLine to test if I'm on the internet or not. You can also use ServerSocket and test if you current IP address is 127.0.0.1, if it is then you are not on the internet.

I don't believe in using google or any other website for that fact just to see if you are online when there are plenty of tools/libraries for B4A to do that for you

Click to expand...

Erel said:

WebView is not needed here.

B4X:

   Dim j As HttpJob
   j.Initialize("", Me)
   j.Download("https://www.google.com") 'or better the link that you want to access
   Wait For (j) JobDone(j As HttpJob)
   If j.Success Then
     'there is an internet connection
   End If
   j.Release

Click to expand...

ilan said:

but in b4a i have no Success (Boolean) returned on PageFinished Event, is there a specific reason why?

Click to expand...

ilan said:

EDIT: btw your solution is good for b4a 7+ but not everyone has b4a 7+ and also no Wait For function.

Click to expand...

Peter Simpson said:

As I've just said, use MLWifi, but no you just answered without trying the library itself, but it's up to you..

View attachment 57748

Click to expand...

devmobile said:

If exist wifi but not conencted to internet,what return this library?

Click to expand...

Erel said:

WebView is not needed here.

B4X:

   Dim j As HttpJob
   j.Initialize("", Me)
   j.Download("https://www.google.com") 'or better the link that you want to access
   Wait For (j) JobDone(j As HttpJob)
   If j.Success Then
     'there is an internet connection
   End If
   j.Release

Click to expand...

Erel said:

This is exactly the purpose of Wait For. See the resumable subs tutorial: https://www.b4x.com/android/forum/threads/78601/#content

Click to expand...

Erel said:

Hard to answer your question. You need to understand what the code does and decide whether it is suitable for your requirements or not.

Click to expand...

public boolean isServerReachable(Context context){
ConnectivityManager connMan =(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = connMan.getActiveNetworkInfo();
if(netInfo !=null&& netInfo.isConnected()){
try{
URL urlServer =new URL("your server url");
HttpURLConnection urlConn =(HttpURLConnection) urlServer.openConnection();
urlConn.setConnectTimeout(3000);//<- 3Seconds Timeout
urlConn.connect();
if(urlConn.getResponseCode()==200){
return true;
}
else{
returnfalse;
}
}
catch(MalformedURLException e1){
returnfalse;
}
catch(IOException e){
returnfalse;}
}
returnfalse;
}

Erel said:

This is bad code which should not be used.

Click to expand...