android - 如何从android中的 ListView 中删除特定行？

Question

解释: 我知道这个问题没有问。次。首先尝试了解我的问题。我有一个 ListView ，其中我使用 BaseAdapter 在我的列表行上显示动态项目，它不是固定的。我删除了包含在该行中的数据，但删除了该行。当我删除一行时，它的数据被完全删除但不是 ListView 行。我想从列表中删除特定行。

适配器

public class CartAdapter extends BaseAdapter {

    private static final String TAG=CartAdapter.class.getSimpleName();

    public Context context;
    public List<CartItems> cartItemList;
    public LayoutInflater inflater;
    public AppCompatActivity activity;

    public CartAdapter(Context context, List<CartItems> cartItemList,AppCompatActivity activity) {
        this.context = context;
        this.cartItemList = cartItemList;
        this.activity=activity;
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return this.cartItemList.size();
    }

    @Override
    public Object getItem(int position) {
        return this.cartItemList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }


    private class CartHolder {
        TextView txtItemName, txtItemPrice, txtQtyCount;
        ImageButton btnImgDelete;
    }

    @Override
    public View getView(final int position, View view, ViewGroup viewGroup) {

        final CartHolder holder;
        if (view == null) {
            holder = new CartHolder();
            view = inflater.inflate(R.layout.cart_items, null);

            holder.txtItemName = (TextView) view.findViewById(R.id.txt_item_name);
            holder.txtItemPrice = (TextView) view.findViewById(R.id.txt_item_price);
            holder.txtQtyCount = (TextView) view.findViewById(R.id.txt_qty_count);

            holder.btnImgDelete=(ImageButton)view.findViewById(R.id.btn_img_delete);

            holder.btnImgDelete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(final View view) {
                    final AlertDialog.Builder alertDialog=new AlertDialog.Builder(activity,R.style.MyAlertDialogStyle);
                    alertDialog.setTitle("Delete");
                    alertDialog.setIcon(R.drawable.ic_action_cancel);
                    alertDialog.setMessage("Do you really want to delete item??");
                    alertDialog.setCancelable(true);
                    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            cartItemList.remove(position);
                            notifyDataSetChanged();
                        }
                    });
                    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            dialogInterface.dismiss();
                        }
                    });
                    alertDialog.show();
                }
            });
            view.setTag(holder);
        } else {
            holder = (CartHolder) view.getTag();
        }

        CartItems cartItems = cartItemList.get(position);
        holder.txtItemName.setText(cartItems.getItemName());
        holder.txtItemPrice.setText(Util.priceTODollar(cartItems.getItemPrice()));
        holder.txtQtyCount.setText("" + cartItems.getItemQty());


        return view;
    }
}

从 ListView 中删除项目之前的屏幕截图

从 ListView 中删除项目后的屏幕截图

在第二张截图中，第二个项目被删除，但白色背景颜色保持不变。

请帮我解决这个问题。

Answer 1

最后，我找到了解决方案。经过大量的努力和尝试。我不确定这是否是可行的解决方案。

从适配器中删除项目后，我设置处理程序并将 bundler 传递给 Message 对象，如下所示:

holder.btnImgDelete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(final View view) {
                    final AlertDialog.Builder alertDialog=new AlertDialog.Builder(activity,R.style.MyAlertDialogStyle);
                    alertDialog.setTitle("Delete");
                    alertDialog.setIcon(R.drawable.ic_action_cancel);
                    alertDialog.setMessage("Do you really want to delete item??");
                    alertDialog.setCancelable(true);
                    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            if(cartItemList.remove(cartItems)) {
                                notifyDataSetChanged();

                                Message message=new Message();
                                Bundle bundle=new Bundle();
                                bundle.putSerializable("KEY",(Serializable)cartItemList);
                                message.setData(bundle);
                                activity.uiHomeHandler.sendMessage(message);
                            }
                        }
                    });
                    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            dialogInterface.dismiss();
                        }
                    });
                    alertDialog.show();
                }
            });

在 Activity 中我再次将 cartitemList 对象设置为 baseAdapter 并在删除项目后再次调用它

SuppressLint("HandlerLeak")
    public class UiHandler extends Handler {
        @Override
        public void handleMessage(final Message msg) {
            super.handleMessage(msg);
            Bundle b=msg.getData();
            cartItemList=(List)b.getSerializable("KEY");

            mCartAdapter=new CartAdapter(getApplicationContext(),cartItemList,CartActivity.this);
            lvCartItem.setAdapter(mCartAdapter);
            Helper.getListViewSize(lvCartItem);
        }
    }