【ANDROID STUDIO】 Get Status Updates from Worker Manager

 <?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start"
        android:textSize="30sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.257" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.wordmanager

import android.content.Context
import android.util.Log
import androidx.work.Worker
import androidx.work.WorkerParameters

class UploadWorker(context: Context, params: WorkerParameters) : Worker(context,params) {
    override fun doWork(): Result {
        try {
            for (i in 0..600) {
                Log.i("MYTAG", "Uploading $i")
            }
            return Result.success()
        } catch (e: Exception) {
            return Result.failure()
        }
    }
}

package com.example.wordmanager

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.lifecycle.Observer
import androidx.work.OneTimeWorkRequest
import androidx.work.WorkManager
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        button.setOnClickListener {
            setOneTimeWorkRequest()
        }

    }

    private fun setOneTimeWorkRequest() {
        val workManager = WorkManager.getInstance(applicationContext)
        val uploadRequest = OneTimeWorkRequest.Builder(UploadWorker::class.java)
            .build()
        workManager.enqueue(uploadRequest)
        workManager.getWorkInfoByIdLiveData(uploadRequest.id)
            .observe(this, Observer {
                textView.text = it.state.name
            })
    }

}