Android Question CallSubDelayed on fm_MessageArrived

[sinuser]

Hello to all,
I need to solve this synchronization problem:
when the fm_MessageArrived event intercepts the notification I have to fill a grid.
The problem is if the app is closed or in the background the app crash.
I use the CallSubDelayed to call the main method that fill the grid but obviously if the activity has not finished loading the app crash.
Now in the main method called i use this:
Do While Not (ApplicationIsReady)
Sleep (1000)
Loop
that works but I do not like it, is there a better method?
Thanks

 

[Erel]

I use the CallSubDelayed to call the main method that fill the grid but obviously if the activity has not finished loading the app crash.

Why does the app crash? Where are the logs?

Are you calling StartActivity?

 

[sinuser]

the app crash because the activity is not created, these are my methods:

Sub fm_MessageArrived (Message As RemoteMessage)
Try
Dim ComunicationID As Int = Message.GetData.Get("ComunicationID")
Dim m As String = Message.GetData.Get("body")
Dim t As String = Message.GetData.Get("title")
Dim n As Notification
n.Initialize
n.Icon = "icon"
n.AutoCancel = True
n.SetInfo(t, m, Main)
n.Notify(1)
CallSubDelayed2(Main, "OpenComunication2", ComunicationID)
Catch
Log(LastException)
#if DEBUG
Msgbox(Message, "Notifica")
#End If
End Try
End Sub

private Sub OpenComunication2(ComunicationID As Int)
Do While Not(ApplicationIsReady)
Sleep(1000)
Loop
Dim cm As ResumableSub = RefreshData
ProgressDialogShow2("Aggiorno...", False)
Wait For (cm) Complete (Result As Boolean)
ProgressDialogHide
If Result Then
Dim c As Comunication = CurrentUser.GetComunucation(ComunicationID)
OpenComunication(c)
Else
Msgbox("Errore di connessione, provare ad aggiornare i dati!","Attenzione")
End If
End Sub


with these rows:
Do While Not(ApplicationIsReady)
Sleep(1000)
Loop
the app don't crash but i dont think is the right method to do this no?

Thanks

 

[KMatle]

It's not a good method to start an activity from a (background)service. Better:

1. When new data arrives, store the list with maps e.g. in a file using RAF (Random Access File)
2. Throw a notification like "new data for you"
3. When the user opens the app/activity/notification load and display the file's content as you mentioned

Remember that Android is always "USER-driven". Services are good for simple and non-ui tasks. All UI-things are under demand of the user. If you follow this, you won't have any problems with higher versions of Android in the future.

 

[Erel]

Please use [code]code here...[/code] tags when posting code.