Question

我在项目中使用自定义列表视图，我遇到了一个问题。我使用addview在listview中的行中添加了复选框，但在listview中滚动时取消选中复选框。我按位置尝试了settag / gettag，但在我的情况下，一行有几个复选框，所以我不能使用位置。我怎么解决这个问题？请帮帮我..

public View getView(final int position, View convertView, final ViewGroup parent) {

    View itemView;
    final ViewHolder viewHolder;

    if (convertView == null) {
        itemView = layoutInflater.inflate(R.layout.activity_delivering_partner_item, parent, false);

         viewHolder = new ViewHolder();

        final Deliveryltem deliveryltemPosition = epicerieDelivery_delivering_recipient.selectedDeliveryItem.get(position);

        time = (TextView) itemView.findViewById(R.id. delivering_item_time);
        name = (TextView) itemView.findViewById(R.id.delivering_item_name);
        address = (TextView) itemView.findViewById(R.id.delivering_item_address);
        goods = (TextView) itemView.findViewById(R.id.delivering_item_goods);
        partner_linear = (LinearLayout) itemView.findViewById(R.id.delivering_partner_goods_linear);
        LayoutInflater layoutInflater =
                (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        partner_linear.removeAllViews();

        String purchase_name = "";


            purchase_name = deliveringListActivity.purchase_name_arr.get(deliveringListActivity.purchase_num);


        time.setText(deliveryltemPosition.shipping_time);

        address.setText(deliveryltemPosition.recipient_address);


            for(int k = 0; k< deliveringListActivity.partner_goods_arr.size(); k++){

                final View addView = layoutInflater.inflate(R.layout.activity_delivering_partner_item_row, null);

                TextView goods_name = (TextView) addView.findViewById(R.id.partner_goods_name_row);
                TextView goods_ea = (TextView) addView.findViewById(R.id.partner_goods_ea_row);
                viewHolder.checkbox = (CheckBox) addView.findViewById(R.id.partner_goods_chbox);

                viewHolder.checkbox.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                        viewHolder.checkbox.setId(position);

                    }
                });

                if(deliveryltemPosition.delivery_order_id.equals(deliveringListActivity.partner_goods_arr.get(k).goods_order_id)){


                    if(deliveringListActivity.partner_goods_arr.get(k).detail_purchase.equals(purchase_name)){

                        goods_name.setText(deliveringListActivity.partner_goods_arr.get(k).detail_product_name);
                        goods_ea.setText(deliveringListActivity.partner_goods_arr.get(k).detail_ea);

                        partner_linear.addView(addView);

                    }else{
                    }

                }else{

                }


        }

        return itemView;


    }else{
        itemView = convertView;

       viewHolder = new ViewHolder();

        if(epicerieDelivery_delivering_recipient.selectedDeliveryItem.size() != 0){

            final Deliveryltem deliveryltemPosition = epicerieDelivery_delivering_recipient.selectedDeliveryItem.get(position);

            time = (TextView) itemView.findViewById(R.id. delivering_item_time);
            name = (TextView) itemView.findViewById(R.id.delivering_item_name);
            address = (TextView) itemView.findViewById(R.id.delivering_item_address);
            partner_linear = (LinearLayout) itemView.findViewById(R.id.delivering_partner_goods_linear);
            LayoutInflater layoutInflater =
                    (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            partner_linear.removeAllViews();


            time.setText(deliveryltemPosition.shipping_time);

            address.setText(deliveryltemPosition.recipient_address);

            String purchase_name = "";

               purchase_name = deliveringListActivity.purchase_name_arr.get(deliveringListActivity.purchase_num);




                for(int k = 0; k< deliveringListActivity.partner_goods_arr.size(); k++){


                    final View addView = layoutInflater.inflate(R.layout.activity_delivering_partner_item_row, null);

                    TextView goods_name = (TextView) addView.findViewById(R.id.partner_goods_name_row);
                    TextView goods_ea = (TextView) addView.findViewById(R.id.partner_goods_ea_row);
                    viewHolder.checkbox = (CheckBox) addView.findViewById(R.id.partner_goods_chbox);


                    viewHolder.checkbox.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {

                           viewHolder.checkbox.setId(position);

                        }
                    });

                    if(deliveryltemPosition.delivery_order_id.equals(deliveringListActivity.partner_goods_arr.get(k).goods_order_id)){


                        if(deliveringListActivity.partner_goods_arr.get(k).detail_purchase.equals(purchase_name)){

                            goods_name.setText(deliveringListActivity.partner_goods_arr.get(k).detail_product_name);
                            goods_ea.setText(deliveringListActivity.partner_goods_arr.get(k).detail_ea);
                            partner_linear.addView(addView);
                        }else{

                        }
                    }else{

                    }
               }
        }
        return convertView;
    }

}

Answer 1

我认为您使用ViewHolder的方法是错误的。在覆盖的getView方法中，您需要更改如下例。

    if (convertView == null) {
        //Your stuffs     
    }else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

According to the documentation:

在滚动ListView期间，您的代码可能经常调用findViewById（），这会降低性能。即使适配器返回一个膨胀的视图以进行回收，您仍然需要查找元素并更新它们。围绕重复使用findViewById（）的方法是使用＆＃34;视图持有者＆＃34;设计模式。

Answer 2

这可以帮助您：

这是因为您没有维护复选框状态，这意味着当您单击复选框时需要将其存储在变量中时，此变量应该在模型类中，并且取决于您需要显示的变量状态复选框。

Answer 3

删除你的if（convertView == null）else条件，或者记住你的pojo类检查更改并设置pojo类的复选框

Answer 4

保存阵列中每个位置的复选框状态并使用此状态，将复选框设置为选中或不选中。请在此链接中查看此问题的解决方案：listview with checkbox status changed when scoll

Answer 5

<强> 1。首先，您必须在适配器

中的全局中初始化布尔数组

boolean[] checkedPositions = {false, false, false, false, false, false, false,
        false, false, false, false, false, false, false, false, false};

boolean size with false＆＃39; s是列表大小如果你的列表有4行，那么像这样写 boolean [] checkedPositions = {false，false，false，false}

<强> 2。在复选框监听器上

checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (b) {
                checkedPositions[position] = true;
            } else {
                checkedPositions[position] = false;
            }
        }
    });

第3。在此代码之后，您必须编写此代码

checkbox.setChecked(checkedPositions[position]);

在listview android中滚动时，复选框未选中

5 个答案: