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Is there a way to get a Subscription from an already connected device using RxAndroidBle? I can't seem to find a way aside from disconnecting and connecting again.

Dariusz Seweryn
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lorenzo
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2 Answers2

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You are probably not interested in getting the Subscription from an already connected device but rather to get an instance of the emitted RxBleConnection.

It is more of an RxJava question then: You can get this kind of behaviour (an Observable<RxBleConnection> that will emit RxBleConnection to any next subscriber if it had already emitted) for instance by using RxReplayingShare. It would look like:

Observable<RxBleConnection> connectionObservable = rxBleDevice.establishConnection(false)
    .compose(ReplayingShare.instance());

Then, every subscriber to the connectionObservable will get the same RxBleConnection as long as it will be valid.

Be careful though because sometimes BLE communication is implemented as stateful (i.e. a request-response model) and this kind of sharing may introduce some hard to spot issues.

Sky Kelsey
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Dariusz Seweryn
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No, you need to maintain the rxbleconnection subscription and instance yourself. The library is stateless.

pawel.urban
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