Android Question Problem handling multiple activities?

'global
dim job1 as httpjob
'activity create
    job1.Initialize("Job1", Me)
    job1.Download("https://weather.yahoo.com/sri-lanka/western/colombo")
'sub job done
Sub JobDone (Job As HttpJob)

  If Job.Success = True Then
  Indexsearch = "<span class=" & Chr(34) & "c" & Chr(34) & "><span class=" & Chr(34) & "num" & Chr(34) & ">"
  Sourcecode = job1.GetString
  Indexofsource = Sourcecode.IndexOf(Indexsearch)
  Indexofsource = Indexofsource + 35
  weather = Sourcecode.SubString2(Indexofsource -1 ,Indexofsource + 1)
  Label5.Text = weather & Chr(176)
End If
End Sub

Sub Globals
   Dim hc As HttpClient
   Dim req As HttpRequest
End Sub

Sub Whatever ...
  hc.Initialize("hc")    
  req.InitializeGet("https://weather.yahoo.com/sri-lanka/western/colombo")
  hc.Execute(req, 1)
end Sub

Sub hc_ResponseSuccess(Response As HttpResponse, TaskId As Int)
                  
   Dim TR As TextReader
   TR.Initialize(Response.GetInputStream)  ' for ICS might have run response.GetAsynchronously ??

   'find a starting point ...
   Dim pattern, line As String
   pattern = "<span class=" & Chr(34) & "c" & Chr(34) & "><span class=" & Chr(34) & "num" & Chr(34) & ">"
  
   Do Until line.Trim = pattern
     line = TR.ReadLine
   Loop

   'go down 2 more lines ..
   line = TR.ReadLine
   line = TR.ReadLine
   myString = line.Trim

   TR.Close

End Sub

Sub hc_ResponseError(Response As HttpResponse, Reason As String, StatusCode As Int, TaskId As Int)

   Msgbox("Error: " & Response.GetString("UTF8"), "Error Accessing Web Page ...")
      
End Sub