Very recently, both anko’s `runOnUiThread` , and m...

# android

[nickk]

Very recently, both anko’s runOnUiThread , and my own take on this (see below), have started to crash my app with this exception:
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

fun executeOnMain(block: () -> Unit) {
    // Get a handler that can be used to post to the main thread
    val mainHandler = Handler(Looper.getMainLooper());

    <http://mainHandler.post|mainHandler.post>(Runnable(block));
}

Any idea?

This is happening in the onError of RxJava (Retrofit with RxJava adapter), when handling a composite exception.
Used to work fine for months.

EDIT:
It crashes on some devices (e.g. Samsung S7 with API 23), while it works fine on others (e.g. Nexus 5X emulator with API 23)…