034-PlayerListDataBinding.md

#034: 播放器列表数据绑定

#首页

##1. 播放器列表播放列表创建一个适配器

TrackPlayListAdapater.java:

public class TrackPlayListAdapter extends RecyclerView.Adapter<TrackPlayListAdapter.InnerHolder>{

    private List<Track> tracks = new ArrayList<>();

    @NonNull
    @Override
    public InnerHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_play_list, parent, false);

        return new InnerHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull InnerHolder holder, int position) {
        Track track = tracks.get(position);
        TextView playListTitle = holder.itemView.findViewById(R.id.tv_play_list_title);
        playListTitle.setText(track.getTrackTitle());
    }

    @Override
    public int getItemCount() {
        return tracks.size();
    }

    public void setData(List<Track> tracks) {
        this.tracks.clear();
        this.tracks.addAll(tracks);
        notifyDataSetChanged();
    }

    public class InnerHolder extends RecyclerView.ViewHolder {
        public InnerHolder(@NonNull View itemView) {
            super(itemView);
        }
    }
}

##2. 播放器列表播放列表绑定布局管理器和适配器

PlayListPopupWindow.java:

LinearLayoutManager linearLayoutManager = new 	LinearLayoutManager(BaseApplication.getAppContext());
playListRecycleView.setLayoutManager(linearLayoutManager);

trackPlayListAdapter = new TrackPlayListAdapter();
playListRecycleView.setAdapter(trackPlayListAdapter);

##3. 绑定专辑列表到适配器

TrackPlayerActivity.java:

public void onPlayList(List<Track> tracks) {
    if (playListPopupWindow != null) {
        playListPopupWindow.setData(tracks);
    }
}

PlayListPopupWindow.java:

public void setData(List<Track> tracks) {
    if (trackPlayListAdapter != null) {
        trackPlayListAdapter.setData(tracks);
    }
}

##4. 修改正在播放节目标题颜色和图标显示

TrackPlayListAdapater.java:

public void onBindViewHolder(@NonNull InnerHolder holder, int position) {
    Track track = tracks.get(position);
    TextView playListTitle = holder.itemView.findViewById(R.id.tv_play_list_title);
    playListTitle.setText(track.getTrackTitle());

    ImageView playListIcon = holder.itemView.findViewById(R.id.iv_play_list_icon);

    if(position == playingIndex){
        playListIcon.setVisibility(View.VISIBLE);
        playListTitle.setTextColor(BaseApplication.getAppContext().getResources().getColor(R.color.subscribe_color));
    }
    else{
        playListIcon.setVisibility(View.GONE);
        playListTitle.setTextColor(BaseApplication.getAppContext().getResources().getColor(R.color.play_list_title_color));
    }
}

##5. 绑定正在播放的节目

###5.1 播放节目有变化时，喜马拉雅回调onSoundSwitch， 获取当前播放位置currentIndex, 并传递给播放器列表弹出窗口

TrackPlayerActivity.java:

public void onSoundSwitch(PlayableModel lastModel, PlayableModel curModel, int currentIndex) {
  	 ...

    if (playListPopupWindow != null) {
        playListPopupWindow.setCurrentPlayIndex(currentIndex);
    }
}

###5.2 播放器列表弹出窗口把当前位置传递给适配器

PlayListPopupWindow.java:

public void setCurrentPlayIndex(int currentIndex) {
    if (trackPlayListAdapter != null) {
        trackPlayListAdapter.setCurrentPlayIndex(currentIndex);
    }
}

###5.3 适配器更新界面

public void setCurrentPlayIndex(int currentIndex) {
    playingIndex = currentIndex;
    notifyDataSetChanged();
}

##6. 效果图