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Question

I develop Enterprise Mobile apps for the aged care sector, developing on Xamarin forms platform.
I have come across issues with Oppo devices in these classes A52 and A17 (CPH2477) running Android 11 and 12 where the app will crash.
If it sits idle on the logon screen where there is no activity it tends to crash consistently after 15 to 18 seconds. I have found that when a fresh install is made then this does not happen on first install but when I close the app down and start the app again this will happen.
I have tried stripping it down code wise removing animation SDK Linking etc but have not found any solutions.
My issue is we have large clients that have bought large quantities of these phones for their nurses, and it renders the App useless.
Our company would prefer our app to work on all devices and not have to force our clients to buy other hardware.

The app itself uses SQLLite and httpclient and read and writes to external/internal storage. I realise there was a change to storage permissions over android 11 so I have added these permissions.

Targets Android 13.
Minimum Android 7.1

Further to this I have an Oppo A78 as a test device running android 13 and the app runs with no problem. All other mobile devices used of other brands have no issue either.
Also I believe Oppo versions running Android 7.1 do not have any issue.

I was hoping you may know of any issues these devices may have and if so how to program against these issues.
I have attached the log cat hoping that you may be able to see some errors that may cause the crash.

Any help would be appreciated.

Time Device Name Type 07-01 14:57:56.275 OPPO CPH2069 07-01 14:57:56.174 OPPO CPH2069 07-01 14:57:56.072 OPPO CPH2069 07-01 14:57:56.041 OPPO CPH2069 07-01 14:57:55.969 OPPO CPH2069 07-01 14:57:55.867 OPPO CPH2069 07-01 14:57:55.766 OPPO CPH2069 07-01 14:57:55.670 OPPO CPH2069 07-01 14:57:55.668 OPPO CPH2069 07-01 14:57:55.666 OPPO CPH2069 07-01 14:57:55.429 OPPO CPH2069 07-01 14:57:55.428 OPPO CPH2069 07-01 14:57:55.664 OPPO CPH2069 07-01 14:57:55.562 OPPO CPH2069 07-01 14:57:55.460 OPPO CPH2069 07-01 14:57:55.428 OPPO CPH2069 07-01 14:57:55.394 OPPO CPH2069 07-01 14:57:55.389 OPPO CPH2069 07-01 14:57:55.387 OPPO CPH2069 07-01 14:57:55.387 OPPO CPH2069 07-01 14:57:55.387 OPPO CPH2069 07-01 14:57:55.386 OPPO CPH2069 07-01 14:57:55.381 OPPO CPH2069 thread: Thread[pool-2-thread-7,5,main]
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17538392, now = 17538443
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17538289, now = 17538342
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17538188, now = 17538239
Debug 5301 HoraeHelper getAllShellTemps tSize : 4
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17538087, now = 17538137
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537987, now = 17538035
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537883, now = 17537934
Info 5174 Athena MemoryGuardAction: triggerMemory:1500MB, availMemory:1508MB
Debug 3817 Launcher. panicValue = false
Debug 1819 AS.AudioService getParameters() keyValuePairs:OPLUS_AUDIO_GET_FOCUS_STACK
Error 3817 Launcher.ColorBubbleTextView mForceHideDot is false
Info 3817 chatty uid=10113(com.oppo.launcher) identical 2 lines
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537782, now = 17537833
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537680, now = 17537730
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537577, now = 17537628
Error 3817 Launcher.ColorBubbleTextView mForceHideDot is false
Info 8669 WeatherS_WeatherServiceManager unBindUpdateService true
Warning 8669 ClockTag ClockWidget.ClockWidgetManager updateWeatherInfo — weatherEntity is null!
Info 8669 WeatherS_WeatherServiceVersionUtils serviceVersionCode14006006
Info 8669 chatty uid=10197(com.coloros.alarmclock) pool-2-thread-6 identical 1 line
Info 8669 WeatherS_WeatherServiceVersionUtils serviceVersionCode14006006
Info 8669 WeatherS_WeatherBaseDataTask after doRequestFromWeatherService getLocationCityDataAndUpdateWeatherInfoIfNeeded result true
Error 24146 WeatherS_LocalUtils startAutoGetLocalCity has no locate city
/> Error 24146 WeatherS_LocalUtils startAutoGetLocalCity bg location permission:false
Info 8669 WeatherS_WeatherServiceManager unBindUpdateService true
Info 8669 WeatherS_WeatherBaseDataTask after doRequestFromWeatherService getResidentSecureSettingsData result true
Error 24146 WeatherS_WeatherCommonServiceProxy getLocationCityInfo
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537474, now = 17537525
Warning 3837 [0]DCS-MobileHelper getContryCode slotid=1,type=1,code=null,result=
Warning 3837 [0]DCS-MobileHelper getContryCode slotid=0,type=1,code=null,result=
Warning 3837 [0]DCS-MobileHelper getContryCode slotid=1,type=1,code=null,result=
Warning 3837 [0]DCS-MobileHelper getContryCode slotid=0,type=1,code=null,result=
Info 8669 WeatherS_WeatherBaseDataTask executeRequest getResidentSecureSettingsData
Info 8669 WeatherS_WeatherBaseDataTask executeRequest getLocationCityDataAndUpdateWeatherInfoIfNeeded
Info 8669 WeatherS_WeatherServiceManager onServiceConnected
Info 8669 WeatherS_WeatherServiceManager onServiceConnected
Info 8669 WeatherS_WeatherServiceManager bindUpdateService false
Info 8669 WeatherS_WeatherBaseDataTask Service has not started, bind update Service.
Info 8669 WeatherS_WeatherServiceManager bindUpdateService false
Info 8669 WeatherS_WeatherBaseDataTask Service has not started, bind update Service.
Info 8669 WeatherS_WeatherServiceVersionUtils serviceVersionCode14006006
Info 8669 WeatherS_WeatherServiceVersionUtils serviceVersionCode14006006
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537374, now = 17537425
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537272, now = 17537323
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537170, now = 17537221
Verbose 1819 OppoBaseWatchdog @WatchDog_ error e: java.io.FileNotFoundException: /d/wakeup_sources: open failed: ENOENT (No such file or directory)
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17537068, now = 17537119
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536966, now = 17537017
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536865, now = 17536915
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536763, now = 17536814
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536660, now = 17536712
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536559, now = 17536610
Debug 1819 ColorAutomaticBrightnessController Skip onSensorChanaged, pre time = 17536456, now = 17536508
Debug 29490 MbnSystemService MbnTest_ EVENT_SERVICE_BINDED
Debug 29490 MbnSystemService MbnTest_ Fail to find MultiMode from Meta Info
Debug 29490 MbnSystemService MbnTest_ telMode:dsds mbnId:null
Warning 29490 QC_RIL_OEM_HOOK QCRIL_EVT_HOOK_GET_CONFIG failed w/ org.codeaurora.telephony.utils.CommandException: GENERIC_FAILURE
Debug 29490 QC_RIL_OEM_HOOK sendOemRilRequestRaw returns value = -2
Debug 4253 QcrilMsgTunnelIfaceManager handleMessage what = 2
Error 4253 QcRilRequest [1159] < OEM_HOOK_RAW error: org.codeaurora.telephony.utils.CommandException: GENERIC_FAILURE
Info 4253 QcrilOemhookMsgTunnel [0]processOemHookResponse serial no: 1159 error: 2length=0

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Xamarin Forms App crashes on oppo A52/A17 Android 11 and 12