This library has been extracted from nRF Toolbox project. It contains classes useful when doing a connection to a Bluetooth LE device.

BleManager class provides the following features:

1. Connection
2. Service discovery
3. Bonding (optional)
4. Enabling Service Changed indications
5. Device initialization
6. Async BLE operations using queue
7. Reading Battery Level value
8. Requesting MTU and connection priority
9. Error handling
10. Logging (in LogCat and optionally nRF Logger)

It may be used for a single connection (see nRF Toolbox -> RSC profile) or when multiple connections are required (see nRF Toolbox -> Proximity profile), from a Service (see nRF Toolbox -> RSC profile), ViewModel's repo (see Architecture Components and nRF Blinky), or as a singleton (not recommended, see nRF Toolbox -> HRM).

BleManager exposes a high level API instead of low level BLE operations. If autoConnect option is to be used, the manager also handles initial connection (with autoConnect = false), which is much faster, and then reconnects in case of link loss with this parameter set to true. Just return true from shouldAutoConnect() method in your manager.

Clone this project and add ble module as a dependency to your project:

1. In settings.gradle file add the following lines:

include ':ble'
project(':ble').projectDir = file('../Android-BLE-Library/ble')

2. In app/build.gradle file add implementation project(':ble') inside dependencies.
3. Sync project and build it

See example projects listed below.

1. Define your device API by extending BleManagerCallbacks: example
2. Extend BleManager class and implement required methods: example

Find the simple example here Android nRF Blinky.

For an example how to use it from an Activity or a Service, check the base Activity and Service classes in nRF Toolbox.