WM-Factory no interface method getBackgroundExecutor()-CodePudding

I'm learning android development from Android_developer. while using CoroutinesWorker, I encountered a problem whilst working with Kotlin

Logcat

com.google.samples.apps.devbyteviewer E/WM-WorkerFactory: Could 
not instantiate 
com.google.samples.apps.devbyteviewer.work.RefreshDataWorker
    java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
        at 
androidx.work.WorkerFactory.createWorkerWithDefaultFallback(Worker
Factory.java:96)
        at 
androidx.work.impl.WorkerWrapper.runWorker(WorkerWrapper.java:
244)
        at androidx.work.impl.WorkerWrapper.run(WorkerWrapper.java:136)

The Application class from where I instantiate workmanager.

Application class

package com.google.samples.apps.devbyteviewer

import android.app.Application
import androidx.work.*
import 
com.google.samples.apps.devbyteviewer.work.RefreshDataWorker
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import timber.log.Timber
import java.util.concurrent.TimeUnit

As I have read in related posts, my worker class is a top level class and in an independent file.

Worker class

package com.google.samples.apps.devbyteviewer.work

import android.content.Context
import androidx.work.CoroutineWorker
import androidx.work.WorkerParameters
import com.google.samples.apps.devbyteviewer.database.getDatabase
import com.google.samples.apps.devbyteviewer.repository.VideosRepository
import retrofit2.HttpException
import timber.log.Timber


class RefreshDataWorker(appContext: Context, params: WorkerParameters) :
    CoroutineWorker(appContext, params) {
    override suspend fun doWork(): Result {
        val database = getDatabase(applicationContext)
        val repository = VideosRepository(database)

        try {
            repository.refreshVideos()
            Timber.d("Work request for sync is run")
        } catch (e: HttpException) {
            return Result.retry()
        }

        return Result.success()
    }

    companion object {
        /**
         * Define a work name to uniquely identify this worker.
         */
        const val WORK_NAME = "com.example.android.devbyteviewer.work.RefreshDataWorker"
    }

}

CodePudding user response：

I've had the same problem while working with WorkManager.

Pulling meaning from your post and the error message, this is very likely an import related issue. Check your Application dependencies.

Rather than:

implementation "android.arch.work:work-runtime-ktx:$work_version"

Use:

implementation "androidx.work:work-runtime-ktx:$work_version"