bt socket closed, read return: -1, but then emission attempt has been detected

[picobulgarelli]

If I turn off the connected device I receive this error and I don't receive the "Disconnected" message.

Complete error from your sample:

E/AndroidRuntime: FATAL EXCEPTION: main
Process: io.github.thanosfisherman.blueflow.sample, PID: 12390
java.lang.IllegalStateException: Flow exception transparency is violated:
Previous 'emit' call has thrown exception java.io.IOException: bt socket closed, read return: -1, but then emission attempt of value 'io.github.thanosfisherman.blueflow.sample.BtConnection$BtErrorConnectingState@cb152e5' has been detected.
Emissions from 'catch' blocks are prohibited in order to avoid unspecified behaviour, 'Flow.catch' operator can be used instead.
For a more detailed explanation, please refer to Flow documentation.
at kotlinx.coroutines.flow.internal.SafeCollector.exceptionTransparencyViolated(SafeCollector.kt:114)
at kotlinx.coroutines.flow.internal.SafeCollector.checkContext(SafeCollector.kt:82)
at kotlinx.coroutines.flow.internal.SafeCollector.emit(SafeCollector.kt:70)
at kotlinx.coroutines.flow.internal.SafeCollector.emit(SafeCollector.kt:55)
at io.github.thanosfisherman.blueflow.sample.usecase.BtConnectUseCase$connect$1.invokeSuspend(BtConnectUseCase.kt:19)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7399)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:502)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)

It would be nice if you can also provide a sample to receive/send data using the mvvm architecture.

[ThanosFisherman]

I've never encountered this issue before with my Bluetooth devices. Thanks for reporting this I will have a look.

[WebTiger89]

BtDisconnectedState is never set or did I miss something? I'm also wondering how to distinguish between an error and an intended disconnect and how to disconnect friendly? Unfortunately your sample does not cover this.