This is a known issue which has been reported here: 
https://bugreports.qt.io/browse/QTBUG-72101

A patch is pending to be included too so you can try that to see if it helps in 
all your cases.

Andy

Fra: Interest <[email protected]> på vegne av ekke 
<[email protected]>
Organisasjon: independent softwarearchitect
Dato: onsdag 28. november 2018 16:54
Til: "[email protected]" 
<[email protected]>, "[email protected]" 
<[email protected]>
Emne: Re: [Interest] [Android-development] Qt 5.12 RC, Android apps FREEZE

Apps not only freeze on Samsung devices. trying to figure out with my test 
users where's the difference to Qt 5.11.2 + Target SDK 26, NDK 10e

it seems that the freeze happens, if
·         App started
·         doing much network traffic (loading JSON data from server)
·         click Home button to send App to background
·         reopen App
·         App freezes
are there any changes in 5.12 with Android and QNAM or 
QNetworkConfigurationManager ?
I'm listening to SLOT(onOnlineStateChanged(bool)

Android devices are connected via WIFI - tomorrow users will test if also 
happens if connected to mobile network

thx for any hints
ekke

Am 27.11.18 um 15:29 schrieb ekke:

sent out my apps to test to customers
·         Qt 5.12 RC
·         QtC 4.8.0 RC1
·         Android Build/Target SDK: 28
·         NDK 18b

running the apps on Samsung devices (XCover 4, S7, S8) if switching between 
apps,

suddenly Qt Apps freeze and after some time Android asks: wait / quit

cannot reproduce this with other Android devices

any ideas what could be wrong ?

(using Qt 5.11.2 apps are running well)

ekke



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