Flutter run external App after selection? - flutter

Is it possible to include an selection of all apps on the device, that the user can select the app? Also the same with Bluetooth connection. The user can select an Bluetooth device and when the device is accessible the selceted app starts? Give it packages for flutter, which can handle this?

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IOS & WatchOS background communication

I have a IOS application with a companion WatchOS application. I am wondering if there is a way I can communicate with the IOS application in real time while it not running as a foreground application.
The best example I can think of is how your are able to use the Spotify watch app to change songs, like songs or even change the volume of the phone while the phone is locked.
How could I implement something like this for an application that could possibly send data frequently from the watch to the phone while the phone is locked.
Watch apps can launch their companion iOS apps by messaging them:. https://developer.apple.com/documentation/watchconnectivity/wcsession/1615687-sendmessage
That won’t work if the iOS device requires unlock because it’s just booted up.
I just started WatchOS development and needed to send a message to the watch app - if it's available I use sendMessage. If the watch app is backgrounded, I use transferUserInfo. Link to code snippets. I check isReachable and isPaired (on the phone, isPaired does not exist in WatchOS).

electron app to manage wifi connection of the device

I want to create an electron app through which I can manage the wifi connections of the device. How to approach it? Is there any library available which gives me access to wifi api of the device?

How to get the ID to register a test device for unity ads

How and where can I see this number needed to register a test device in unity ads?
it depends wheter its what phone you are using if its an Android based phone for example you can find that number behind the battery usually or with simple commands on the phone itself,
e.g. (Android) https://www.verizonwireless.com/b2c/findDeviceId/helpOverlay.jsp?pageName=androidPhone
(Iphone) https://support.apple.com/en-il/HT204073
that number just tells unity that any ads running on that device are test ads and treat them so.
For Android device.
Open google settings from device.
Navigate to services->Ads.
Advertising id for your android device will there.

Device to device communication with Xamarin

I am developing an application for iOS, Android, UWP and Windows Phone 8.1 device with Xamarin Forms.
In this app I have a key feature witch require the app to send notifications to other device (which are also running the app).
The amout of data is realy low but it has to be fast (don't want to use a backend).
What I want to do:
When the user lunch the app, the app scan network (Wifi and/or bluethooth) to find if another app is already running)
If the app find nothing, it launch a server part.
If the app find someting, it connect to the other device (with allow/disallow screen).
So I am considering the folowing solution :
Wifi (but it requires all devices to be on the same network).
Bluetooth
I don't find best pratice or guides for this.
Does someone have already tried and have a solution ?
Thanks.

IPhone SDK - Bluetooth capabilities

with the current version of the iPhone SDK, is it possible to establish a bluetooth connection to any other bluetooth device, or are there restrictions?
A customer wants an iPhone app to get specific data from another device via bluetooth. This device is measuring some chemical stuff and has a bluetooth interface. So the customer wants to send some data to this device, and then the device sends data back to the iPhone. Is this possible right now?
And by the way: Is it possible to offer iPhone apps to a customer other than using iTunes?
Thanks for your help!
Here you go! All I can say is have fun trying to get in. And to get the apps on try ad hoc which is part of the $99 a year dev program