notifydatasetchanged不是从异步任务工作

Question

您好我想我的问题是有关这个notifyDataSetChanged not working on RecyclerView 我尝试从一个异步任务刷新我的布局，但是当IM调用通知datasetchanged什么也不会发生，但如果我创建适配器的新实例和调用notifydatasetchanged那么它的工作香港专业教育学院尝试了一些东西没有用，不知道什么即时通讯做错了，

我像这样引用它

public ListAdapter cardAdapter; 

那么的onCreate我初始化一切与我的回收观点做， （这里唯一需要的是我如何初始化我的适配器bu吨清晰生病添加的一切与我的回收以做）

staggeredGridLayoutManagerVertical = new 
    customLinearLayoutManager(this,customLinearLayoutManager.VERTICAL,false); 
    recyclerView = (RecyclerView) findViewById(R.id.list_view); 
    OnItemTouchListener itemTouchListener = new  
    FinalListActivity.OnItemTouchListener() { 
     @Override 
     public void onCardClick(View view, int position) { 
      //removeAt(position); 
      list.remove(position); 
      cardAdapter.notifyItemRemoved(position); 
     } 

     @Override 
     public void onCardLongClick(View view, int position) { 
      //clearGrid(); 
     } 
    }; 
    cardAdapter = new ListAdapter(list,this,itemTouchListener); 
    recyclerView.setLayoutManager(staggeredGridLayoutManagerVertical); 
    recyclerView.setItemAnimator(new DefaultItemAnimator()); 
    recyclerView.setAdapter(cardAdapter); 
    //cardAdapter.notifyDataSetChanged(); 

    ItemTouchHelper.Callback callback = 
      new SimpleItemTouchHelperCallback(cardAdapter); 
    mItemTouchHelper = new ItemTouchHelper(callback); 
    mItemTouchHelper.attachToRecyclerView(recyclerView); 

，如果我将项目添加到列表中，则这些方法我回收视图显示的信息，但我想要的是抢在异步任务的信息之前，并在onPostExecute中填充列表，但是当我拨打

cardAdapter.notifyDataSetChanged(); 

from onPostExecute没有任何反应，任何帮助？

编辑 添加适配器

public class ListAdapter extends 
RecyclerView.Adapter<ListAdapter.MyViewHolder> 
implements ItemTouchHelperAdapter{ 
private List<String> cardMakerList; 
private OnStartDragListener mDragStartListener; 
private FinalListActivity.OnItemTouchListener onItemTouchListener; 

public class MyViewHolder extends RecyclerView.ViewHolder{ 
    public EditText cardText; 
    public ImageView close; 
    public ContentLoadingProgressBar progress; 
    public ImageView handleView; 
    public RelativeLayout cardBack; 

    public MyViewHolder(View view){ 
     super(view); 
     cardText = (EditText) view.findViewById(R.id.cardText); 
     close = (ImageView) view.findViewById(R.id.close); 
     cardBack =(RelativeLayout)view.findViewById(R.id.cardLayout); 
     close.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       onItemTouchListener.onCardClick(v, getPosition()); 
      } 
     }); 
     /* 
     close.setOnLongClickListener(new View.OnLongClickListener() { 
      @Override 
      public boolean onLongClick(View v) { 
       onItemTouchListener.onCardLongClick(v, getPosition()); 
       return true; 
      } 
     }); 
     */ 
     progress = (ContentLoadingProgressBar) 
     view.findViewById(R.id.progress); 
     handleView = (ImageView)view.findViewById(R.id.handle); 
    } 

} 
public ListAdapter(List<String> cardMakerList,OnStartDragListener 
dragStartListener,FinalListActivity.OnItemTouchListener onItemTouchListener) 
{ 
    this.cardMakerList = cardMakerList; 
    mDragStartListener = dragStartListener; 
    this.onItemTouchListener = onItemTouchListener; 
} 
@Override 
public boolean onItemMove(int fromPosition, int toPosition) { 
    if (fromPosition < toPosition){ 
     for (int i = fromPosition; i < toPosition; i++){ 
      Collections.swap(cardMakerList,i,i+1); 
     } 
    }else{ 
     for (int i = fromPosition; i > toPosition; i--){ 
      Collections.swap(cardMakerList,i,i-1); 
     } 
    } 
    notifyItemMoved(fromPosition,toPosition); 
    return true; 
} 
@Override 
public void onItemDismiss(int position) { 
    cardMakerList.remove(position); 
    notifyItemRemoved(position); 
} 
@Override 
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){ 
    View itemView = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.card_view_holder, parent, false); 
    return new MyViewHolder(itemView); 
} 

@Override 
public void onBindViewHolder(final MyViewHolder holder, final int position) 
{ 
    String cardString = cardMakerList.get(position); 
    holder.cardText.setText(cardString); 
    holder.handleView.setOnTouchListener(new View.OnTouchListener() { 
     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      if (MotionEventCompat.getActionMasked(event) == 
        MotionEvent.ACTION_DOWN) { 
       mDragStartListener.onStartDrag(holder); 
      } 
      return false; 
     } 
    }); 
    holder.close.setOnTouchListener(new View.OnTouchListener() { 
     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      //cardMakerList.remove(position); 
      return false; 
     } 
    }); 
} 
@Override 
public int getItemCount(){ 
    return cardMakerList.size(); 
} 
} 

Answer 1

有很多原因，这可能发生，其中一个是list变量没有在某个时候失去它的主实例以及因为更新适配器不再监听它。在这种情况下，你应该在你的适配器要刷新RecyclerView只是调用此方法与新清单每次执行现在像

public void refreshMyList(List<String> list){ 
    this.cardMakerList.clear(); 
    this.cardMakerList.addAll(list); 
    this.notifyDataSetChanged(); 
} 

的方法。