Gists to embed in WorkManager blog. Full code is available at https://github.com/aruke/WorkManagerDemo.

SimpleWorker_Observe.kt

val workerId = simpleWorkRequest.id
        
WorkManager.getInstance().getWorkInfoByIdLiveData(workerId)
        .observe(this, Observer<WorkInfo> {
            it?.let { workInfo ->
                when (workInfo.state) {
                    WorkInfo.State.ENQUEUED ->
                        Log.d(TAG, "Worker ENQUEUED")
                    WorkInfo.State.RUNNING ->
                        Log.d(TAG, "Worker RUNNING")
                    WorkInfo.State.SUCCEEDED ->
                        Log.d(TAG, "Worker SUCCEEDED")
                    WorkInfo.State.FAILED ->
                        Log.d(TAG, "Worker FAILED")
                    WorkInfo.State.BLOCKED ->
                        Log.d(TAG, "Worker BLOCKED")
                    WorkInfo.State.CANCELLED ->
                        Log.d(TAG, "Worker CANCELLED")
                }
            }
        })