how to play audio offline by url? - kotlin

Question

i want to if i press play - the audio start playing, but if I will turn off the internet after some time, I can still listen to the audio to the end, how can i do this using andoid-mediaPlayer?
in kotlin
class MusicService:Service(),MediaPlayer.OnPreparedListener,MediaPlayer.OnCompletionListener,MediaPlayer.OnErrorListener {
override fun onBind(intent: Intent?): IBinder? {
return musicBind
}
override fun onCreate() {
super.onCreate()
player= MediaPlayer()
}
fun initMusic(){
player.setWakeMode(applicationContext,PowerManager.PARTIAL_WAKE_LOCK)
player.setAudioStreamType(AudioManager.STREAM_MUSIC)
player.setOnPreparedListener(this)
player.setOnCompletionListener(this)
player.setOnErrorListener(this)
}
override fun onUnbind(intent: Intent?): Boolean {
player.stop()
player.reset()
player.release()
return false
}
inner class MusicBinder:Binder(){
val service: MusicService
get() = this#MusicService
}
companion object{
const val STOPPED = 0
const val PAUSED =1
const val PLAYING = 2
}
override fun onPrepared(mp: MediaPlayer?) {
mp!!.start()
val duration=mp.duration
seekBar.max=duration
seekBar.postDelayed(progressRunner,instentval.toLong())
end_point.text= String.format("%d:%02d",TimeUnit.MILLISECONDS.toMinutes(duration.toLong()),
TimeUnit.MILLISECONDS.toSeconds(duration.toLong())-
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(duration.toLong())))
}
private fun playSong(){
try {
player.reset()
val playSong=songs
val uri = playSong.link
player=MediaPlayer.create(this, Uri.parse(uri))
try {
player.start()
progressRunner.run()
}catch (e:HttpException){
Toast.makeText(this,"Http went wrong!",Toast.LENGTH_SHORT).show()
}
} catch (e:Exception){
Toast.makeText(this,"something went wrong!",Toast.LENGTH_SHORT).show()
}
}
fun setUI(seekBar: SeekBar,start_int:TextView,end_int:TextView){
this.seekBar=seekBar
start_point=start_int
end_point=end_int
seekBar.setOnSeekBarChangeListener(object :SeekBar.OnSeekBarChangeListener
{
override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
if (fromUser){
player.seekTo(progress)
}
start_point.text = String.format(
"%d:%02d",TimeUnit.MILLISECONDS.toMinutes(progress.toLong()),
TimeUnit.MILLISECONDS.toSeconds(progress.toLong())-
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(progress.toLong())))
}
override fun onStartTrackingTouch(seekBar: SeekBar?) {
TODO("Not yet implemented")
}
override fun onStopTrackingTouch(seekBar: SeekBar?) {
TODO("Not yet implemented")
}
}
)
}
private var progressRunner:Runnable = object :Runnable {
override fun run() {
if (seekBar!=null){
seekBar.progress=player.currentPosition
if (player.isPlaying){
seekBar.postDelayed(this,instentval.toLong())
}
}
}
}
fun setSong(result: Result){
songs=result
playerState= PLAYING
playSong()
}
fun setSongmp3(mp3: Mp3){
songsmp3=mp3
playerState= PLAYING
playSongmp3()
}
public fun puseSong()
{
player.pause()
playerState = PAUSED
}
public fun resumeSong(){
player.start()
playerState= PLAYING
}
override fun onCompletion(mp: MediaPlayer?) {
}
override fun onError(mp: MediaPlayer?, what: Int, extra: Int): Boolean {
return false
}
}