如何显示歌曲持续时间

Question

所以我使用Mediastore获取歌曲持续时间但我需要将它们转换为秒我需要将它们格式化为HH：MM：SS（小时：分钟：秒）我尝试使用TimeUnit但是没有工作或者我没有实现它正确方式

谢谢你的帮助对不起英语不好

请帮忙。 SongAdapter.java

@Override
public void bindView(View view, Context context, Cursor cursor) {




    TextView title1 = (TextView) view.findViewById(R.id.titlelist);
    TextView artist1 = (TextView) view.findViewById(R.id.artistlist);
    TextView duration1 = (TextView) view.findViewById(R.id.durationlist);
    ImageView album1 = (ImageView) view.findViewById(R.id.iconlist);

     title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
    String artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));
    String duration = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
    String album = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));
    long albumId = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));
      StringBuilder titleBuild = new StringBuilder();

      titleBuild.append(title);

      if(titleBuild.length() > 35)
      {
      titleBuild.setLength(32);
      title = titleBuild.toString()+"...";
      }
      else
      {
          title = titleBuild.toString();
      }
      StringBuilder artistBuild = new StringBuilder();
      artistBuild.append(artist);
      if(artistBuild.length() > 35)
      {
      artistBuild.setLength(32);
      artist = artistBuild.toString()+"...";
      }
      else
      {
      artist = artistBuild.toString();
      }

      final Uri ART_CONTENT_URI = Uri.parse("content://media/external/audio/albumart");
        Uri albumArtUri = ContentUris.withAppendedId(ART_CONTENT_URI, albumId);

        if(albumArtUri == null){

            Picasso.with(context).load(R.drawable.default_artwork)
            .resize(300, 300).centerInside().into(album1);

        }


          Picasso.with(context).load(albumArtUri)
          .resize(300, 300).centerInside().into(album1);



duration1.setText(duration);          
title1.setText(title);
artist1.setText(artist);
}

Answer 1

一旦你有了持续时间，

称这个例程（但我相信有更优雅的方式）。

public String convertDuration(long duration) {
    String out = null;
    long hours=0;
    try {
        hours = (duration / 3600000);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return out;
    }
    long remaining_minutes = (duration - (hours * 3600000)) / 60000;
    String minutes = String.valueOf(remaining_minutes);
    if (minutes.equals(0)) {
        minutes = "00";
    }
    long remaining_seconds = (duration - (hours * 3600000) - (remaining_minutes * 60000));
    String seconds = String.valueOf(remaining_seconds);
    if (seconds.length() < 2) {
        seconds = "00";
    } else {
        seconds = seconds.substring(0, 2);
    }

    if (hours > 0) {
        out = hours + ":" + minutes + ":" + seconds;
    } else {
        out = minutes + ":" + seconds;
    }

    return out;

}

Answer 2

Theo的答案非常好，它决定了在两种状态下显示时间：

如果小时不大于0，则仅显示分钟和秒。

这是一个非常整洁的方法，但正如他所提到的，它不是很优雅。

您可以使用以下方法简化操作：

//convert the song duration into string reading hours, mins seconds
int dur = (int) song.get(position).getDuration();

int hrs = (dur / 3600000);
int mns = (dur / 60000) % 60000;
int scs = dur % 60000 / 1000;

String songTime = String.format("%02d:%02d:%02d", hrs,  mns, scs);

你应该知道三件事：

1. 持续时间以毫秒为单位存储; 1000毫秒= 1秒
2. 使用%来获得总和的余数，即60,000符合dur值的次数是多少？
3. 使用除以1000得到scs是以秒为单位得到绝对值，而不是毫秒。

如果你不想使用它，也许你更喜欢使用：

//convert the song duration into string reading hours, mins seconds
int dur = (int) song.get(position).getDuration();

int hrs = (dur / 3600000);
int mns = (dur / 60000) % 60000;
int scs = dur % 60000;

NumberFormat formatter = new DecimalFormat("00");
String seconds = formatter.format(scs);

String songTime = String.format("%02d:%02d", hrs,  mns);
String output = songTime + ":" + seconds;

根据我的理解，Java不喜欢Milliseconds不到3位数，因为它很小，因此不能使用％02d友好地显示，这就是我将scs除以1000的原因。使用Numberformatter强制格式化数字值只能分配，在这种情况下为00 。

Answer 3

从MediaPlayer或MediaStore Class获取时间

设置文本如下（在Kotlin中）（在Java中使用setText）

songTimeFav?.text = String.format("%d:%d",
                TimeUnit.MILLISECONDS.toMinutes(finalTime?.toLong() as Long),
                TimeUnit.MILLISECONDS.toSeconds(finalTime?.toLong() as Long) -
                        TimeUnit.MINUTES.toSeconds(
                                TimeUnit.MILLISECONDS.toMinutes(finalTime.toLong())))

songTimeFav是TextView的对象