从 Adapter 中刷新整个 RecyclerView

Question

我尝试从 Adapter class（onBindViewHolder 方法）中刷新整个 RecyclerView。如果我点击列表中的一个项目，我希望这个项目的参数会改变。最好的方法是什么？

onBindViewHolder Adapter 中的方法 class:

@Override
public void onBindViewHolder(@NonNull final StoreRecyclerViewAdapter.ViewHolder holder, final int position) {

    // Get the image of the Player item
    Glide.with(context)
            .asBitmap()
            .load(allPlayers.get(position))
            .into(holder.playerInStore);

    // Get the price of the Player of the item
    holder.playerPrice.setText(allPrices.get(position).toString());

    // Get the status of the Player of the item
    holder.status = allStatus.get(position);

    // If Player status is "CLOSED", get the closed lock image of the item
    if (allStatus.get(position).equals("CLOSE")) {
        Glide.with(context)
                .asBitmap()
                .load(close.getStatusPic())
                .into(holder.playerLock);

        // The user can purchase the item
        holder.layoutStore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                int price = Integer.valueOf(holder.playerPrice.getText().toString());
                boolean canPurchase = StoreLogic.getStoreLogic().canPurchase(price);

                if (canPurchase) {

                    String purchaseSuccessfully = "purchase succcessfully :)";
                    Toast.makeText(context, purchaseSuccessfully, Toast.LENGTH_SHORT).show();

                    // update list details
                    //****************** REFRESH LIST *******************



                }
                else {
                    String purchaseFailed = "not enough coins :(";

                    Toast.makeText(context, purchaseFailed, Toast.LENGTH_SHORT).show();

                }
            }
        });
    }

    // If Player status is "OPEN", get the open lock image of the item
    else {
        Glide.with(context)
                .asBitmap()
                .load(open.getStatusPic())
                .into(holder.playerLock);

        // The user cannot purchase the item
        holder.layoutStore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(context, "already available", Toast.LENGTH_SHORT).show();

            }
        });
    }
}

initRecyclerView RecyclerView 中的方法 class:

protected void initRecyclerViewForAllPlayers() {
    RecyclerView recyclerView = findViewById(R.id.rv_store);
    StoreRecyclerViewAdapter adapter = new StoreRecyclerViewAdapter(this, allPlayers, allPrices, allStatus, open, close);
    recyclerView.setAdapter(adapter);
    recyclerView.setLayoutManager(new LinearLayoutManager((this)));

}

找到解决方案

不幸的是，评论中的解决方案都没有帮助，方法notifyDataSetChanged()，notifyItemChanged(position)没有刷新数据。

也许它会在将来帮助某人：为了刷新整个列表，我访问了 Activity (Store) 中的 init 方法 (initImageBitmapsForAllPlayers)，并从适配器中的 onBindViewHolder 调用它：

if (context instanceof Store) {
    notifyItemChanged(position);
    ((Store) context).initImageBitmapsForAllPlayers();
}

Answer 1

如果您想要更改整个项目集，只需在适配器中调用 notifyDataSetChanged() 即可。如果您知道更改了哪些项目，notifyItemChanged()、notifyItemInserted() 和 notifyItemDeleted() 会更有效。

Answer 2

要在单击时仅更改列表中的一项，请在更改其参数后调用：

notifyItemChanged(position)

Answer 3

如果您已经使用过 recyclerview 并且想要更改整个回收器视图项目以便您可以使用 notifyDataSetChanged()，如果您从 recyclerview 中删除了一些项目以便您可以使用 notifyItemDeleted() 如果您添加了一些更多数据，所以在添加数据后只需调用 notifyItemChanged(), notifyItemInserted()

如果你想从 activity 添加删除和更新数据，这样你就可以使用接口

Answer 4

调用以下方法刷新内部适配器：

notifyDataSetChanged()

里面activity

if (recyclerView.getAdapter() != null) {
     recyclerView.getAdapter().notifyDataSetChanged();
}

Answer 5

试试这个：

RecyclerView recyclerView = findViewById(R.id.rv_store);
recyclerView.setLayoutManager(new LinearLayoutManager(LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
StoreRecyclerViewAdapter adapter = new StoreRecyclerViewAdapter(this, allPlayers, allPrices, allStatus, open, close);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();

从 Adapter 中刷新整个 RecyclerView

refresh the whole RecyclerView from within the Adapter

java

android

adapter

android-recyclerview