How can I update seekBar by seconds on Media Player?(kotlin) - function

Question

package com.example.ebookactivity
import android.media.MediaPlayer
import android.os.Bundle
import android.os.Handler
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.example.ebookactivity.databinding.FragmentDay1Binding
import android.widget.SeekBar
import android.os.SystemClock
import android.widget.TextView
import androidx.annotation.Dimension
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private const val ARG_PARAM1 = "param1"
private const val ARG_PARAM2 = "param2"
/**
* A simple [Fragment] subclass.
* Use the [day_1.newInstance] factory method to
* create an instance of this fragment.
*/
class day_1 : Fragment() {
// TODO: Rename and change types of parameters
private var param1: String? = null
private var param2: String? = null
private var _binding: FragmentDay1Binding? = null
private val binding get() = _binding!!
private var mediaPlayer: MediaPlayer? = null
private val textsize_plus: Float = 10.0f
private lateinit var runnable: Runnable
private lateinit var handler: Handler
private lateinit var duration: TextView
private val j:Int = 0
var size:Float = 70.0f
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
arguments?.let {
param1 = it.getString(ARG_PARAM1)
param2 = it.getString(ARG_PARAM2)
}
if(mediaPlayer?.isPlaying == true) {
//seekbar()
binding.textView2.text = "tankyou"
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
}
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
// Inflate the layout for this fragment
_binding = FragmentDay1Binding.inflate(inflater,container,false)
if (mediaPlayer?.isPlaying == true) {
binding.seekBar.progress = mediaPlayer!!.currentPosition
}
binding.button1.setOnClickListener {
size -= textsize_plus
binding.gangu.setTextSize(Dimension.DP,size)}
binding.buttonplus.setOnClickListener {
size += textsize_plus
binding.gangu.setTextSize(Dimension.DP,size)}
//seekbar()
binding.startbutton.setOnClickListener {
if(mediaPlayer == null) {
mediaPlayer = MediaPlayer.create(activity, R.raw.days_1)
binding.seekBar.max = mediaPlayer!!.duration
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
// seekbar()
}
mediaPlayer?.start()
}
binding.pausebutton.setOnClickListener {
if (mediaPlayer?.isPlaying == true) {
mediaPlayer?.pause()
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
} else {
mediaPlayer?.start()
}
}
binding.stopbutton.setOnClickListener {
mediaPlayer?.stop()
mediaPlayer=null
}
fun onStop() {
super.onStop()
mediaPlayer?.release()
}
binding.seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
override fun onProgressChanged(seekBar: SeekBar, i: Int, b: Boolean) {
if (b) {
mediaPlayer?.seekTo(i/* * 1000*/)
// seekbar()
if (mediaPlayer?.isPlaying == true) {
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
}
}
binding.textView4.text = "ok"
if (mediaPlayer?.isPlaying == true) {
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
}
}
override fun onStartTrackingTouch(seekBar: SeekBar) {
}
override fun onStopTrackingTouch(seekBar: SeekBar) {
}
}
)
return binding.root
}
companion object {
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment day_1.
*/
// TODO: Rename and change types and number of parameters
#JvmStatic
fun newInstance(param1: String, param2: String) =
day_1().apply {
arguments = Bundle().apply {
putString(ARG_PARAM1, param1)
putString(ARG_PARAM2, param2)
}
}
}
override fun onPause() {
super.onPause()
mediaPlayer?.stop()
}
fun seekbar() {
binding.seekBar.setProgress(mediaPlayer!!.currentPosition)
val min2: Int = mediaPlayer!!.duration / 60000
val sec2: Int = (mediaPlayer!!.duration - min2 * 60000) / 1000
val min: Int = mediaPlayer!!.currentPosition / 60000
val sec: Int = (mediaPlayer!!.currentPosition - min * 60000) / 1000
binding.textView2.text = "" + min + " : " + sec + ""
binding.textView4.text = "" + min2 + " : " + sec2 + ""
runnable = Runnable { seekbar() }
handler.postDelayed(runnable, 1000)
}
}
I want to update seekBar by seconds. but No matter where I put setProgress code, it isn't working. SetProgress is just working on ButtonClick in this code. I want to make seekbar update by seconds. so I make seekbar function. but it isn't work. If I put seekbar function any places, application would be broken. So I cannot resolve this problem. Please help me...