Seekbar一次又一次地更新整首歌

Question

您好，我想平稳地更新seekbar，每秒钟更新一次，所以我创建了一个使用计时器的方法，每秒钟更新seekbar，但它每秒钟都在更新歌曲，我到处搜索，但没有找到解决方案，我不想使用任何处理程序，我想用这个方法修复

 private  void updateseekbar() {


    seekBar.setMax(mediaPlayer.getDuration());

     new Timer().schedule(new TimerTask() {
       @Override
       public void run() {

                   seekBar.setProgress(mediaPlayer.getCurrentPosition());

       }
   },1000,1000);

在这里我实现了歌曲开始时的方法

  public void play(View v) {

    if (mediaPlayer == null) {
        mediaPlayer = MediaPlayer.create(this, songlist.get(index));
        mediaPlayer.start();
        updateseekbar();
        imageview.setImageResource(R.drawable.img_btn_play_pressed);
    } else if (mediaPlayer.isPlaying()) {
        mediaPlayer.pause();
        imageview.setImageResource(R.drawable.img_btn_pause);
    } else if (mediaPlayer != null) {
        mediaPlayer.start();
        imageview.setImageResource(R.drawable.img_btn_play_pressed);



    }

这是我的全部代码

private SeekBar seekBar;
TextView startduration,totalduration;
ImageView imageview, forwardd, backword, next, previous;
ArrayList<Integer> songlist = new ArrayList<>();
MediaPlayer mediaPlayer;
int seektime = 5000;
int index = 0;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    seekBar = (SeekBar) findViewById(R.id.seekBar);
    imageview = (ImageView) findViewById(R.id.imageview);
    forwardd = (ImageView) findViewById(R.id.forwardd);
    backword = (ImageView) findViewById(R.id.backword);
    next = (ImageView) findViewById(R.id.next);
    previous = (ImageView) findViewById(R.id.previous);
    startduration= (TextView) findViewById(R.id.startduration);
    totalduration= (TextView) findViewById(R.id.totalduration);


    songlist.add(R.raw.diljaniya);
    songlist.add(R.raw.stand);
    songlist.add(R.raw.haledil);
    songlist.add(R.raw.myname);
    songlist.add(R.raw.fiftyways);
    songlist.add(R.raw.desiboys);

    previous = (ImageView) findViewById(R.id.previous);

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

         seekBar.setMax(mediaPlayer.getDuration());
         mediaPlayer.seekTo(i);


     }

     @Override
     public void onStartTrackingTouch(SeekBar seekBar) {

     }

     @Override
     public void onStopTrackingTouch(SeekBar seekBar) {

     }
 });

    forwardd.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (mediaPlayer != null) {
                int med = mediaPlayer.getCurrentPosition();
                if (med <= mediaPlayer.getDuration()) {
                    mediaPlayer.seekTo(med + seektime);
                    seekBar.setProgress(med+seektime);


                }
            } else {

            }
        }
    });
    backword.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (mediaPlayer != null) {
                int med = mediaPlayer.getCurrentPosition();
                if (med - seektime >= 0) {
                    mediaPlayer.seekTo(med - seektime);
                    seekBar.setProgress(med-seektime);
                } else {
                }
            } else {
            }
        }
    });
}

public void play(View v) {

    if (mediaPlayer == null) {
        mediaPlayer = MediaPlayer.create(this, songlist.get(index));
        mediaPlayer.start();
        updateseekbar();
        imageview.setImageResource(R.drawable.img_btn_play_pressed);
    } else if (mediaPlayer.isPlaying()) {
        mediaPlayer.pause();
        imageview.setImageResource(R.drawable.img_btn_pause);
    } else if (mediaPlayer != null) {
        mediaPlayer.start();
        imageview.setImageResource(R.drawable.img_btn_play_pressed);



    }

}

public void previouss(View v) {
    if (mediaPlayer != null) {
        mediaPlayer.stop();
        mediaPlayer.reset();
    }

    if (index < songlist.size() - 1) {
        mediaPlayer = MediaPlayer.create(this, songlist.get(index));
        mediaPlayer.start();
        seekBar.setProgress(0);
    } else {
        index = 0;
        return;
    }
    index++;
}

public void next(View v) {

    if (mediaPlayer != null) {
        mediaPlayer.stop();
        mediaPlayer.reset();
    }
    if (index < songlist.size()) {
        mediaPlayer = MediaPlayer.create(this, songlist.get(index));
        mediaPlayer.start();
        seekBar.setProgress(0);
    } else {
        index = 0;
        return;
    }
    index++;
}


private  void updateseekbar() {


    seekBar.setMax(mediaPlayer.getDuration());

     new Timer().schedule(new TimerTask() {
       @Override
       public void run() {

                   seekBar.setProgress(mediaPlayer.getCurrentPosition());

       }
   },1000,1000);

}








}

Answer 1

将计时器声明为全局成员变量，如下所示；

Timer timer=new Timer();

像这样更新updateseekbar方法里面的歌曲

  private void updateseekbar(Boolean songPlay) {
    if(songPlay){
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                seekBar.setProgress(mediaPlayer.getCurrentPosition());

            }
        },1000,1000);
        handler.postDelayed(runnable,0);
    }else {
        timer.cancel();
        timer.purge();
    }
}

在播放这样的歌曲时更新seekBar

updateseekbar(true);

像这样停止seekBar更新

updateseekbar(false);