Kotlin - "Inappropriate Block Method Call" when making Bluetooth Connection inside Coroutine

El Sushiboi :

I am getting a warning when I try to make a BT connection inside a coroutine.

I've checked this SO post, but it was only abstract theorycrafting and no material code. One of the answers there mentioned that the warning in the title should be dealt in a case-by-case basis, so here is my case. Does anyone know how I can resolve the warning? Thanks!

fun initSocket() = runBlocking {
    try {
        mSocket = // Assume socket is initialized correctly. Not relevant here
        mSocket.connect() // "Inapproprite Blocking Method Call"
        mOutputStream = mSocket.outputStream
    } catch (e: Exception) {
        Log.e(LOG_TAG, "Error establishing Socket Connection...")
    }
}

Marko Topolnik :

Your code doesn't actually contain any suspendable function calls. Simply remove runBlocking and you'll have the same blocking behavior that you have now.

If, by any chance, you do have some suspendable calls which you removed from your example as "irrelevant", then you should move the blocking call outside runBlocking and wrap only those suspendable calls in it.

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