曲目暂停时，MediaStyle通知进度栏会继续前进API 30

问题描述

当我从通知中暂停时，进度条将继续播放，因为它仍在播放。如果我再按一次播放，进度条将返回到其最初暂停的位置，然后正确恢复。我暂停时就会出现问题：进度条不会停止并且一直在前进。每当我的媒体播放器检测到播放状态更改时，我首先更新PlaybackStateCompat，然后更新MediaMetadataCompat，最后显示通知。一切都以这种方式运行良好，直到我们在API 30中运行该应用程序为止，该应用程序在扩展的通知中具有进度条。在此图像中，播放状态已暂停，但进度条正在前进。

这就是我创建PlaybackStateCompat.Builder的方式。该文档说，您应该在暂停时将playbackSpeed设置为0，这正是我正在做的事情。

@Override
public PlaybackStateCompat.Builder getPlaybackState(int typeMetadata,@PlaybackStateCompat.State int playbackStateCompact,MediaInfo mediaInfo,long position) {
    PlaybackStateCompat.Builder stateBuilder = new PlaybackStateCompat.Builder();
    switch (typeMetadata) {
        case MetaDataType.MEDIAINFO:
            stateBuilder.setActions(getIconButtons());
            stateBuilder.setExtras(getPlaybackStateExtras(mediaInfo));

            if (mediaInfo.getMediaType() == MediaInfo.MediaType.RADIO) {
                stateBuilder.setState(playbackStateCompact,PlaybackStateCompat.PLAYBACK_POSITION_UNKNOWN,1.0f);
            } else {
                if (playbackStateCompact == PlaybackStateCompat.STATE_PAUSED) {
                    stateBuilder.setState(playbackStateCompact,position,0.0f);
                } else if (position == 0) {
                    stateBuilder.setState(playbackStateCompact,1.0f);
                } else {
                    stateBuilder.setState(playbackStateCompact,1.0f,SystemClock.elapsedRealtime());
                }
            }
            return stateBuilder;
        case MetaDataType.AD:
        case MetaDataType.EMPTY:
            stateBuilder.setActions(PlaybackStateCompat.ACTION_PREPARE);
            stateBuilder.setBufferedPosition(0);
            stateBuilder.setState(PlaybackStateCompat.STATE_BUFFERING,1);
            break;
    }
    return stateBuilder;
}

这就是我创建MediaMetadataCompat.Builder

的方式

@Override
public MediaMetadataCompat.Builder getMediaCompact(int typeMetadata,MediaInfo mediaInfo) {

    final MediaMetadataCompat.Builder mediaBuilder = new MediaMetadataCompat.Builder();
    switch (typeMetadata) {
        case MetaDataType.MEDIAINFO:
            if (mediaBuilder != null) {
                mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_MEDIA_ID,mediaInfo.getId());
                mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_TITLE,mediaInfo.getTitle());
                mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ARTIST,mediaInfo.getSubtitle());
                mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM,mediaInfo.getAlbum());
                mediaBuilder.putLong(MediaMetadataCompat.METADATA_KEY_DURATION,mediaInfo.getDuration());
                mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ART_URI,ImageManager.getImageUrl(mediaInfo.getCoverPhoto()));
            }
            break;
        case MetaDataType.AD:
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_MEDIA_ID,"");
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_TITLE,ApaManager.getInstance().getMetadata().getString("ad_title_banner"));
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ARTIST,"");
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM,"");
            mediaBuilder.putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART,BitmapFactory.decodeResource(MyApplication.getAppContext().getResources(),R.drawable.place_holder_playlists));
            break;
        case MetaDataType.EMPTY:
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_MEDIA_ID,"");
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ARTIST,"");
            mediaBuilder.putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ART_URI,"");
            break;
    }
    return mediaBuilder;
}

解决方法

问题是方法getPlaybackState在调用时收到错误的@ PlaybackStateCompat.State。