How to save seekbar value in android studio?

Question

I have a media player with a seek bar inside of a bottom sheet, and whenever I play whatever sound on the URL that I'm having the seek bar goes just fine but when I close the bottom sheet and open it up again the seek bar reach to 100% of its value and the sounds are still on the beginning.

How do I make the seek bar work when the sound is playing in the background?

Please help me, and thanks in advance.

My fragment

    private var mediaPlayer:MediaPlayer? = null
 private var oTime = 0
private var sTime: Int = 0
private var eTime: Int = 0

  fun quranMp3(){

 quranPlay?.setOnClickListener {
        // الفاتحة

        if (quranPageNum?.equals(0)!!){

            if (mediaPlayer == null){
                mediaPlayer = MediaPlayer.create(context, Uri.parse("https://server7.mp3quran.net/basit/Almusshaf-Al-Mojawwad/001.mp3"))
                Log.d("quranMp3", "ID: ${mediaPlayer!!.audioSessionId}")

                val position = mediaPlayer!!.currentPosition/100
                mp3SeekBar.progress = position
                //totalTime = mediaPlayer!!.duration

                eTime = mediaPlayer!!.duration.toLong().toInt()
                sTime = mediaPlayer!!.currentPosition.toLong().toInt()

                if (oTime == 0) {
                    quranSeekBar!!.setMax(eTime)
                    oTime = 1
                }

                playerDuration?.text = String.format(
                    "%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes(eTime.toLong()),
                    TimeUnit.MILLISECONDS.toSeconds(eTime.toLong()) - TimeUnit.MINUTES.toSeconds(
                        TimeUnit.MILLISECONDS.toMinutes(eTime.toLong())))

                playerPosition?.text = String.format(
                    "%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes(sTime.toLong()),
                    TimeUnit.MILLISECONDS.toSeconds(sTime.toLong()) - TimeUnit.MINUTES.toSeconds(
                        TimeUnit.MILLISECONDS.toMinutes(sTime.toLong())))





                initializeSeekBar()



            }

            mediaPlayer?.start()
            Log.d("QuranMp3", "Duration: ${mediaPlayer!!.duration/1000} seconds")

        }

   quranPause?.setOnClickListener {

        if (mediaPlayer !== null){
            mediaPlayer?.pause()
            Log.d("QuranMp3", "Paused at: ${mediaPlayer!!.duration/1000} seconds")

        }



 mp3SeekBar.setOnSeekBarChangeListener( object : SeekBar.OnSeekBarChangeListener{

            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {


                if (fromUser){
                    mediaPlayer?.seekTo(progress)

                }
            }
            override fun onStartTrackingTouch(seekBar: SeekBar?) {
                val Toast = Toast.makeText(context,"تتبع..", Toast.LENGTH_LONG)
                Toast.setGravity(Gravity.CENTER_VERTICAL, 50, 50)
                Toast.show()
            }
            override fun onStopTrackingTouch(seekBar: SeekBar) {
                val Toast = Toast.makeText(context,"يرجى الانتظار للحصول على البيانات..", Toast.LENGTH_LONG)
                Toast.setGravity(Gravity.CENTER_VERTICAL, 50 ,50)
                Toast.show()


            }

        })

 private fun initializeSeekBar() {

    val mp3SeekBar = view?.findViewById<SeekBar>(R.id.mp3SeekBar)
    mp3SeekBar?.max = mediaPlayer!!.duration
    val playerPosition = view?.findViewById<TextView>(R.id.player_position)
    val playerDuration =  view?.findViewById<TextView>(R.id.player_duraation)

    val seekbar = this.activity?.getSharedPreferences("QuranPdf", Context.MODE_PRIVATE)


    val handler = Handler()
    handler.postDelayed(object : Runnable {

        override fun run() {


            try {

                sTime = mediaPlayer!!.currentPosition

                playerDuration!!.text = String.format(
                    "%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes(eTime.toLong()),
                    TimeUnit.MILLISECONDS.toSeconds(eTime.toLong()) - TimeUnit.MINUTES.toSeconds(
                        TimeUnit.MILLISECONDS.toMinutes(eTime.toLong())))

                playerPosition?.text = String.format(
                    "%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes(sTime.toLong()),
                    TimeUnit.MILLISECONDS.toSeconds(sTime.toLong()) - TimeUnit.MINUTES.toSeconds(
                        TimeUnit.MILLISECONDS.toMinutes(sTime.toLong())))


                mp3SeekBar?.progress = sTime //mediaPlayer!!.currentPosition
                handler.postDelayed(this, 1000)

            } catch (e: Exception) {
                mp3SeekBar?.progress = 0

            }
        }

    }, 0)
}

My App Photos

as you can when I open the bottom sheet and press play, everything works fine.

first one

!

but when I close the bottom sheet and open it up again the sound is working but the seek bar and the texts are not working.

second one

Java and Kotlin are acceptable

Answer 1

I found the answer to this problem. Apparently, I have to initialize the seekbar in

onResume method.

this is the solution to my question. I only need to add this code

 override fun onResume() {


    try {

        if (mediaPlayer !=null && mediaPlayer!!.isPlaying){
            initializeSeekBar()
        }

    }catch (e : Exception){
        e.printStackTrace()
    }

    super.onResume()
}