如何在Android中跟踪/管理runnables

Question

在我的代码中，我需要为邮件实施即时垃圾邮件操作。为此我在不等待服务器响应的情况下更改了我的消息。但有时在服务器请求错误上我需要将我的消息状态恢复为原始状态。 handler.removeCallbacks(runnable)不让我知道runnable是否已经运行。我怎么能做到这一点？我还对通过RxJava或其他技术执行这些延迟作业的其他建议持开放态度。

var handler = Handler()

fun spamMessage(originalMessage: ContentMessage) {
        var runnable: Runnable? = null
        val modifiedMessage = originalMessage.cloneUsingJson()

        if (modifiedMessage != null) {
            modifiedMessage.setSpamReported(true)
            runnable = Runnable {
                updateMessage(message)
            }
            updateWithDelay(runnable)
        }

        ApiClient.service.spamMessage(message.serverId).subscribeAsync(subscriptions, object : ApiSubscriberNew<Void>() {
            override fun onFailure() {
                var canceled : Boolean = handler.removeCallbacks(runnable)
                if (!canceled) {
                    //if couldn't cancel, or was late, revert the changes
                    revertMessageUpdate(originalMessage)
                }

            }

        })
    }

private fun updateWithDelay(runnable: Runnable) {
        handler.postDelayed(runnable, 100)
}