xamarin - Android Honeywell CT50: Trigger done(completed) event -

i'm developing app in xamarin forms device , need configure "phone" call done event (this event raised when user ended input pressing return key on keyboard , have attached print screen)after each scan , can't figure out how . have tried adding carriage return suffix not work .i can't seem find information topic online .

picture of want achieve

any information , suggestion appreciated.

thanks,

[edit]-my app ( it's testing )

my xaml:

<?xml version="1.0" encoding="utf-8"?> <contentpage xmlns="http://xamarin.com/schemas/2014/forms"              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"              x:class="test.views.page1"              title="page1">          <stacklayout padding="10" backgroundcolor="white">              <entry placeholder="scan text" completed="entry_oncompleted"/>         </stacklayout>  </contentpage> 

code behind :

 private async void entry_oncompleted(object sender, eventargs e)         {            await displayalert("done", "scan completed", "ok");         } 

if press button message "scan completed". want same functionality without having manually press button. want event triggered after each scan (i need know when scanning it's done can scanned code). know there text changed event it's not need (the scanned code not have standard form/length).

did try permanently add scan suffix [cr] scanner? in android 6 in settings / scanning / internal scanner / default profile / data processing settings / suffix...

just add \r [cr].