Step 3 : Foreground service : AudioForegroundLoopService

AudioForegroundLoopService.kt

import android.app.Service
import android.content.Intent
import android.media.MediaPlayer
import android.os.Build
import android.os.IBinder
import com.alokomkar.helper.NotificationHelper
import com.alokomkar.javacollections.R

class AudioForegroundLoopService: Service() {

    private val notificationHelper: NotificationHelper by lazy {
        NotificationHelper(this)
    }

    private val mediaPlayer: MediaPlayer by lazy {
        MediaPlayer.create(this, R.raw.sample_audio)
    }

    // execution of service will start
    // on calling this method
    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        when(intent?.action) {
            ServiceAction.START_ACTION.value -> startPlayback()
            ServiceAction.STOP_ACTION.value -> stopService()
            else -> return START_NOT_STICKY
        }
        return START_NOT_STICKY
    }

    private fun startPlayback() {
        mediaPlayer.apply {
            isLooping = true
            start()
        }
        // publish notification
        startForeground(NotificationHelper.NOTIFICATION_ID, notificationHelper.getNotification())
    }

    // No binding allowed with any UI component
    override fun onBind(intent: Intent?): IBinder? {
        return null
    }

    private fun stopService() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            stopForeground(true)
        } else {
            stopSelf()
        }
    }

    // execution of the service will
    // stop on calling this method
    override fun onDestroy() {
        super.onDestroy()
        mediaPlayer.stop()
    }
}