Sample app?

[qxdevelop]

Please could you put a sample app? Im trying to use the sample at the presentation page:

        val obdConnection = ObdDeviceConnection(socket.inputStream, socket.outputStream)
        val response = obdConnection.run(SpeedCommand())

But it looks like wrong by compiler for the "obdConnection.run()". Error showed is:
Suspend function 'run' should be called only from a coroutine or another suspend function

[MartinLukacSTUBA]

@qxdevelop hello, did you move on ? or did you find any sample application for that ?

[AugustinVoiMa]

Hello,
As shown by the error message, you are trying to call a function that blocks the execution thread. I assume that you are trying to call it from the main UI Thread. It is not recommanded to block the UI thread as it would cause a freeze of the UI. That's why even the compiler prevent you to do that.

I am not very skilled in Kotlin but I found a simple way of achieving an async call to the obd.run that later produce a result on the UI thread:

fun custom_run(command: ObdCommand, use_cache: Boolean = false): CompletableFuture<ObdResponse> {
        val response = CompletableFuture<ObdResponse>()

        runBlocking {
            launch {
                // What is inside "launch" block will be executed on a corouting, this code can block without blocking the calling thread
                val res = obd_co.run(command, use_cache)
                response.complete(res)
            }
        }
        return response
    }

When the result will be ready, it will be placed in a promise on which you can register a main thread

custom_run(VINCommand(), use_cache = true).thenAccept {
  // Do what you want with "it", an ObdResponse object
  // This code will run on the current execution thread
}