问如何将Hashmap<String、List<Items>>扩展到回收视图中

EN

public class Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{

private WeakHashMap<String, List<VideoItem>> mData = new WeakHashMap<>();
private ArrayList<String> mKeys;
ArrayList<WeakHashMap<String,List<VideoItem>>> hashMapArrayList;

public Adapter(WeakHashMap<String, List<VideoItem>> mData, ArrayList<WeakHashMap<String,List<VideoItem>>> hashMapArrayList) {
    this.mData = mData;
    this.hashMapArrayList=hashMapArrayList;
    mKeys = new ArrayList<String>(mData.keySet());
}

public String getKey(int position)
{
    return (String) mKeys.get(position);
}


@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.player_item, parent, false);
    MyViewHolder holder=new MyViewHolder(v);
    return holder;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    String key = getKey(position);
    WeakHashMap<String, List<VideoItem>> value = hashMapArrayList.get(position);
    MyViewHolder holder1=(MyViewHolder)holder;
    holder1.header.setText(key);
    holder1.value.setText(value.get( key ).get( position ).getDuration());
    Log.v( "KEY",key );
    Log.v( "VALUE", String.valueOf( value ) );
}

@Override
public int getItemCount() {
    return (null != hashMapArrayList ? hashMapArrayList.size() : 0);

}

//    public  ArrayList<WeakHashMap<String,List<VideoItem>>> getItem(int position) {
//        return hashMapArrayList.get(mKeys.get(position));
//    }

@Override
public long getItemId(int position) {
    return position;
}
class MyViewHolder extends RecyclerView.ViewHolder{
    TextView header ;
    TextView value;
    public MyViewHolder(View itemView) {
        super(itemView);
        header= (TextView) itemView.findViewById(R.id.header);
        value= (TextView) itemView.findViewById(R.id.task_name);
    }
}