Task httpclient -> call just one time ?

cristopheB 551

Hello,
I have an app under xamarin android who call a controller in http and get some information ..
All works fine BUT sometimes we notice we have the same call in the same hour / sec

For to resume, inside the controller i have a log who trace the begin of the call and the end of the call
And i don't know why but sometimes for the same device , the call http is like DUPLICATE multiple time ...

Any idea about how to solve this ?

thanks

JarvanZhang 23,961 Reputation points

2021-07-27T08:33:08.093+00:00

Hi,chbernard. Where do you call the controller? Do you place the code in a lifecycle method? You could add a breakpoint to check if the code is executed multiple times.
cristopheB 551 Reputation points

2021-07-27T08:54:16.897+00:00
Hello @JarvanZhang

thanks for comment
here is it few code how it's call

protected override bool OnViewBecomeActive(View root)
{
Task.Run(() => CreateInvoice(createInvoiceParamaters));
}

and inside the createInvoice method we have this:

public void CreateInvoice(CreateInvoiceParamaters createInvoiceParamaters)
{
var url = App.Config.GetInvoiceEndpoint(xxxxxxxxxxx);
var result = HttpService.Get<InvoiceResult>(url);

// ...

}

Me, each time i try it's call one time ..until now i can t reproduce this case ..
I try to find solution but until now i can't ...

Any idea , suggestion are welcome

thanks
JarvanZhang 23,961 Reputation points

2021-07-27T09:03:08.423+00:00

Sorry, what is the 'OnViewBecomeActive' method? I could not get the related info about the method. I mean where the function code is called in the xamarin.Android project.
cristopheB 551 Reputation points

2021-07-27T13:54:54.473+00:00

Hello @JarvanZhang

yes exactly it's xamarin android and its a fragment -> and it's method it's call on OnCreateView

thanks for your research ..i'm trying again but without succedeed to reproduce this case ..

It's strange i m not expert but thanks for your time
JarvanZhang 23,961 Reputation points

2021-07-28T07:01:36.247+00:00

Do you want to execute code every time the fragment is displayed on the screen? The 'OnCreateView' method will be invoked by Android when it is time to render the fragment on the screen. If you replace the fragment and then switch back to the previous fragment, this lifecycle method will also be triggered and the call is executed if you place the code in the lifecycle method.
cristopheB 551 Reputation points

2021-07-28T08:18:29.213+00:00

Hello @JarvanZhang

yes when the fragment is visible, the call to the controller is send.

But what i have as problem is , i don't know why but i have several calls to the controller at the same times , same hours and seconds,
and the onCreateView is a lifecycle method.

I have a problem on the call but i don't find really what happens ..
and i've try since 2 days more or less to reproduce this case ...but actually not ..

strange situation ...
JarvanZhang 23,961 Reputation points

2021-07-28T09:54:10.47+00:00

Please add breakpoints to the code to check when the code is called multiple times and what caused it.

1 answer

cristopheB 551 Reputation points

2021-08-05T14:12:20.31+00:00

IHello @JarvanZhang

I"ve find :)
In fact, it's an pagerAdater who load multiple fragment and the life cycle for all was not good ..

as this, we spend some in multiple time in the call http

thanks for your help
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JarvanZhang 23,961 Reputation points

2021-08-06T01:06:59.18+00:00

My pleasure.
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Task httpclient -> call just one time ?

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