Button pause,next,previous;
TextView songLabel;
SeekBar seekBar;
String sName;
static MediaPlayer mediaPlayer;
int position;
Thread updateSeekBar;
ArrayList<File> mysongs;
TextView elapsedTime;
TextView totalTime;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    pause=findViewById(R.id.btn_pause);
    next=findViewById(R.id.btn_next);
    previous=findViewById(R.id.btn_previous);
    songLabel=findViewById(R.id.txtSongLabel);
    seekBar=findViewById(R.id.seekbar);
    elapsedTime=findViewById(R.id.txtelapsed_time);
    totalTime=findViewById(R.id.txttotal_time);



    updateSeekBar = new Thread(){


        @Override
        public void run() {

            int totalDuration = mediaPlayer.getDuration();
            int currentPosition = 0;

            while(currentPosition<totalDuration){


                try{

                    sleep(1000);
                    currentPosition = mediaPlayer.getCurrentPosition();

                    seekBar.setProgress(currentPosition);
                }

                catch (InterruptedException e){

                    e.printStackTrace();

                }


            }

        }
    };


     if(mediaPlayer!=null){



        mediaPlayer.stop();
        mediaPlayer.release();

    }


     Intent i = getIntent();

    Bundle bundle = i.getExtras();

     assert bundle != null;
     mysongs = (ArrayList)bundle.getParcelableArrayList("songs");

    sName = mysongs.get(position).getName();

    String songname = i.getStringExtra("songName");



    songLabel.setText(songname);
    songLabel.setSelected(true);


    position = bundle.getInt("pos",0);

     Uri u = Uri.parse(mysongs.get(position).toString());

     mediaPlayer = MediaPlayer.create(getApplicationContext(), u);

     mediaPlayer.start();

     seekBar.setMax(mediaPlayer.getDuration());

     updateSeekBar.start();

     seekBar.getProgressDrawable().setColorFilter(getResources().getColor(R.color.clrSongName), PorterDuff.Mode.MULTIPLY);
     seekBar.getThumb().setColorFilter(getResources().getColor(R.color.colorPrimary), PorterDuff.Mode.SRC_IN);








     seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
         @Override
         public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

         }

         @Override
         public void onStartTrackingTouch(SeekBar seekBar) {


         }

         @Override
         public void onStopTrackingTouch(SeekBar seekBar) {

             mediaPlayer.seekTo(seekBar.getProgress());

         }
     });




     pause.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {

             seekBar.setMax(mediaPlayer.getDuration());


             if(mediaPlayer.isPlaying()){

                 pause.setBackgroundResource(R.drawable.icon_play);
                 mediaPlayer.pause();



             }



             else {


                 pause.setBackgroundResource(R.drawable.icon_pause);
                 mediaPlayer.start();

             }

         }
     });


     next.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {

             mediaPlayer.stop();
             mediaPlayer.release();

             position = ((position+1)%mysongs.size());

             Uri u = Uri.parse(mysongs.get(position).toString());

             mediaPlayer = MediaPlayer.create(getApplicationContext(), u);

             sName = mysongs.get(position).getName().replace(".mp3", "").replace(".Mp3", "").replace(".m4a", "");
             songLabel.setText(sName);

             mediaPlayer.start();


         }
     });



     previous.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {

             mediaPlayer.stop();
             mediaPlayer.release();

             position = ((position-1)<0)?(mysongs.size()-1): (position-1);

             Uri u = Uri.parse(mysongs.get(position).toString());

             mediaPlayer = MediaPlayer.create(getApplicationContext(), u);

             sName = mysongs.get(position).getName().replace(".mp3", "").replace(".Mp3", "").replace(".m4a", "");
             songLabel.setText(sName);

             mediaPlayer.start();

         }
     });



 }