Android Question Notification Service

[SternFaun]

Hello together,

how can I create a service (always running in the background, starting by systemboot), which checks a date typed in my app and gives a notification (how can I create a notification)?

Thanks for your help.

 

[ivan.tellez]

how can I create a notification

Lots of examples in the forum (also some libs). Just use the search function.

 

[Erel]

Start with this tutorial: https://www.b4x.com/android/forum/threads/7542/#content

 

[SternFaun]

Hello, thanks for your answers. I finished my app, but I have a last problem:

The Activity (it is only one) puts a date in a Public process global ("ServiceDatum").

Sub Process_Globals

   Private n As Notification
   Public ServiceDatum2 As Long
End Sub

Sub Service_Create

End Sub

Sub Service_Start (StartingIntent As Intent)

StartServiceAt(Me, DateTime.Now + 10 * DateTime.TicksPerSecond, True)  

            ServiceDatum2 = Main.ServiceDatum
            If ServiceDatum2 <= DateTime.Now Then

            n.Initialize
            n.Icon = "icon"

            n.SetInfo("Notizen","Notiz zu erledigen",Main)
            n.AutoCancel = True
            n.Notify(1)
            n.Light = True

    Else
    End If

End Sub

I dont want the Service to start when I start the activity or when the activity is open. I tried only do "if IsPaused(Main)", but this didnt word.

Second problem is, that if I press the notification the activity does not open (as defined in "n.SetInfo("Notizen","Notiz zu erledigen",Main)"), it appears just a empty black screen with the title.

Any solutions?

 

[Erel]

I don't understand your code. You need to call StartServiceAt from your activity if you want to start the service at the scheduled time.

 

[SternFaun]

Thanks for your answer.The app should work like a calendar. the app writes a date in a file. the service should check all 10 minutes if the date written in the file is the actual date (datetick in file <= dateutils.now). this means the service has to run all ten minutes (for example) also if the activity isnt started the whole time.

 

[Erel]

You don't need to start the service every 10 minutes.

[B4X] Calculating the next scheduled time

 

[SternFaun]

Ok. That is a good thing. but if i say start it every 12h, isnt it the same?

Do you have an idea why the app does not open when i click the notification? where is the entry point in the activiy after clicking the notification, does it always start in the activity create sub?

 

[Erel]

It is hard to say without seeing the complete code. The code you posted assumes that the process will not be killed. This is a wrong assumption. You should save any important information in a file.

where is the entry point in the activiy after clicking the notification, does it always start in the activity create sub?

If the activity was destroyed then Activity_Create will be called. Activity_Resume is always called.

 

[SternFaun]

Ok. Thanks very much for your help! Everything is clear.