BatteryLevel | Minimalistic Application which shows the current Battery

I'm trying to extract a text from a website

Below is the part of HTML Code

I kept getting the error

No task request with identifier has been scheduled

in my debugger output so I decided to try running the example code provided by Apple here and got the same error. I've tried multiple computers and Xcode versions, multiple example projects from different sources and nothing has worked.

My AppDelegate.swift file:

I have a Bluetooth LE scan running which filters for specific Devices. This works fine and I see that the devices get actually added to my list. But it doesn't trigger anything on my MainActivity. Here is a snipped from the relevant code (it does work similar to a normal scanCallback from BTLE):

Some of my users have head unit devices on Android (in their cars) and of course such device doesn't have battery and the next code returns 0

val batteryLevel = batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY)

and the next method will return false

Delphi 10.3.3

got here Android 10 (also Android 8). Battery Optimization is off . The problem only happens if my Device is on the charger. After approximately 48hrs it dies .

I tried to solve this by waking the device up periodically (after 8hrs) . Today it last sent data to the server at 3:00 , so I thought it is dead. But to my big surprise , it still woke up at 08:00 . Unfortunately after touching the screen , to try to open something . Android forced me to close the app.

Here is the part of the code :

(excuse me for the length, it looks to be long , but is is the bare minimum , I thought I'd include every procedure and function I use in order to perhaps help someone smarter then me see if I am leaking memory or doing something horrible, note : this very same code is NOT crashing or hanging after weeks if Device is not on the charger)

I have just Copied the code from flutter.dev and modified it and getting following error

E/flutter ( 2639): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: MissingPluginException(No implementation found for method myNativeFunction on channel My Channel) * I want to print a message from Native java code to Flutter UI *

I have a simple Android app. I imported a new flutter module. When I pass to the Flutter page, I can not implement native code anymore. I got an error No implementation method found for method getBatteryLevel. How can I fix this?

Note: If I run the flutter module itself, I can get the result of native code.

The triggered method in main.dart:

I have an app that is using BLE connectivity with my device. Everything works from connecting to the device, discovering the services, writing the characteristic and descriptor. But for some reason, onCharacteristicChanged is not triggering. The goal is to retrieve the data from the characteristic that is in the characteristic. I have tried using a different characteristic from the same service and this works as in retrieving the data. Not sure why this specific characteristic is not working when others are.

Here is my code: //Descriptor public final static UUID UUID_CLIENT_CHARACTERISTIC_CONFIG = UUID.fromString(GattAttributes.CLIENT_CHARACTERISTIC_CONFIG);

I have been working on a react native application where I have to fetch the geolocation at an interval of 10secs and update it to a server. I was able to do the same when the emulator was active/ in the foreground.

However, when the app is minimized, it doesn't work. I tried using expo task manager but the function doesn't seem to run when backgrounded.

What is the error here? I have attached my code and output.

I am using android 11 using an emulator and personal device.

Here is my code: