搜索栏不随音轨移动 运行。无法调试

Question

学习了 Youtube 教程。但是我的搜索栏不会随着音频移动。根据教程，我已经添加了处理程序和一个可运行的。我是不是漏了什么

private MediaPlayer music;
Handler handler;
Runnable runnable;
SeekBar seek;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    handler = new Handler();
    Button play = (Button) findViewById(R.id.play);
    Button pause = (Button) findViewById(R.id.pause);
    music = MediaPlayer.create(this, R.raw.gnr_sweet);
    seek = (SeekBar)  findViewById(R.id.seekBar);
    seek.setMax(music.getDuration());
    playCycle();
    seek.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean userinput) {
            if(userinput){
                music.seekTo(progress);
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }
    });
}
public void playCycle(){
    seek.setProgress(music.getCurrentPosition());
    if(music.isPlaying()){
        runnable= new Runnable() {
            @Override
            public void run() {
                playCycle();
            }
        };
        handler.postDelayed(runnable, 1000);
    }
}

我对 android 开发有点陌生，所以任何类型的输入都可能有用。 我在 playCycle() 方法中遗漏了什么吗？ 还有一个播放暂停按钮的 clicklistener，我刚刚从代码片段中删除它以获得 Whosebug

的干净代码

Answer 1

删除此条件

@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean userinput) {
    // if(userinput){
        music.seekTo(progress);
    // }
}

进度条变化

public void playCycle(){
    int mCurrentPosition = mMediaPlayer.getCurrentPosition() / 1000;
    seek.setProgress(mCurrentPosition);
    if(music.isPlaying()){
        runnable= new Runnable() {
            @Override
            public void run() {
                playCycle();
            }
        };
        handler.postDelayed(runnable, 1000);
    }
}

Answer 2

试试这个

  mediaPlayer.seekTo((int) length);
        mediaPlayer.start();

        startTime = mediaPlayer.getCurrentPosition();
        finalTime = mediaPlayer.getDuration();

        seekbar.setMax((int) finalTime);

        handler.postDelayed(runnable, 100);

 @Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
    if (fromUser) {
        if (mediaPlayer == null) {
            seekBar.setProgress(progress);
        } else {
            mediaPlayer.seekTo(progress);
            seekbar.setProgress(progress);
        }
        length = progress;
    }

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {

}

和

  Runnable runnable = new Runnable() {
    @Override
    public void run() {
        startTime = mediaPlayer.getCurrentPosition();
        seekbar.setProgress((int) startTime);
        handler.postDelayed(this, 100);
    }
};

对我有用

Answer 3

在我这部分，我创建了一个 Runnable。 那么我认为你需要在调用handler.postDelayed之前先设置seekBar.setProgress。这对我有用。

private Runnable runnable = new Runnable() {
    @Override
    public void run() {
        displayCurrentTime();
        seekBar.setProgress((int) player.getCurrentTimeMillis());
        mHandler.postDelayed(this, 100);
    }