Скачать или смотреть Implementing Bluetooth Low Energy Device Discovery with RxKotlin in Android

Uncover how to efficiently create an observable for Bluetooth device discovery using RxKotlin in your Android application. Step-by-step guide included.
---
This video is based on the question https://stackoverflow.com/q/67293882/ asked by the user 'Ubarjohade' ( https://stackoverflow.com/u/4990578/ ) and on the answer https://stackoverflow.com/a/67295389/ provided by the user 'mixer' ( https://stackoverflow.com/u/4097210/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Android BLE RxKotlin

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Discovering Bluetooth Devices with RxKotlin in Android

Bluetooth Low Energy (BLE) technology is revolutionizing how devices communicate. However, building a BLE service that scans for devices can be a bit tricky, especially when it comes to making the results observable with RxKotlin. If you've found yourself tangled in a web of guides and fragmented advice, you’re not alone. Here’s a structured guide on how to create an observable that efficiently notifies when BLE devices are found.

Understanding the Problem

The goal is to develop a BLE service that continuously scans for nearby Bluetooth devices. You want to make this information available through an observable, allowing other classes in your application to subscribe and respond whenever a device is detected.

BLE Scanning: Implement a scan that can identify available Bluetooth devices.

Observable Creation: Create an observable that can be subscribed to for updates.

Device Discovery Notification: Notify subscribers each time a new device is found.

Setting Up the BLE Service

Let’s break down the solution into digestible parts. First, we need to set up the BLE service to handle scanning for devices.

Step 1: Class Initialization

You'll want your service class to contain a BehaviorSubject, which is a type of observable that caches the latest emitted item and emits it to new subscribers.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Implementing Scan Callback

Next, you need to override the scan result callback to handle the devices that get discovered. When a device is found, you'll use the onNext() method of your BehaviorSubject to send the new device data.

Here’s an example:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Subscribing to Observables

In your ViewModel or wherever you need to observe for discovered devices, you subscribe to the observable:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Creating a BLE service that uses RxKotlin for observable pattern simplifies handling the discovery of devices. By using BehaviorSubject, you can efficiently manage device notifications throughout your application. This setup allows your users to be informed in real-time as devices appear, enhancing user experience.

By breaking down the process into clear sections and utilizing RxKotlin’s features, you can streamline your Android application's BLE discovery functionality. Happy coding!