If you have a `suspend fun` annotated with `@Throws(IOException::class)`, then the IDE will signal ...

# coroutines

[gergo]

If you have a suspend fun annotated with @Throws(IOException::class), then the IDE will signal an “Inapropiate blocking method call”, even if the called method runs on the IO dispatcher. Example:

suspend fun testCall(uri: Uri) {
    val image = encodeImageToBase64(uri)
}

@Throws(IOException::class)
private suspend fun encodeImageToBase64(imageUri: Uri): String = withContext(<http://Dispatchers.IO|Dispatchers.IO>) {
    // Do something
    ""
}

(Android Studio 3.6-rc02, kotlin version: 1.3.50/1.3.61)

I am not sure why this warning is shown in such case? Could this be a lint issue or am I missing something?

[Brandon Trautmann]

If it's an Android lint issue, there will be an issue ID along with the warning

[Kroppeb]

It's nothing to worry about. It thinks you are calling a java function that would block the thread. The compiler isn't advanced enough yet to see you properly wrapped your call.