Question

自定义列表适配器类。

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


    ViewHolder holder;
    if(convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.cart_item, null);
        holder = new ViewHolder();
        holder.image =  (ImageView) convertView.findViewById(R.id.item_image);
        holder.name = (TextView) convertView.findViewById(R.id.item_name);
        holder.price = (TextView) convertView.findViewById(R.id.item_price);
        holder.qty = (Spinner) convertView.findViewById(R.id.spinner_qty);
        holder.delete_btn = (Button) convertView.findViewById(R.id.delete_btn);
        convertView.setTag(holder);

    }else{
        holder = (ViewHolder) convertView.getTag();
    }

    //holder.image
    holder.name.setText(productArray.get(position).getName());
    holder.price.setText("$"+ productArray.get(position).getPrice());
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_item, quantity);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    holder.qty.setAdapter(adapter);
    return convertView;
}

如何单击delete_btn以删除listview项。我不知道如何访问listview。请帮助！

Answer 1

在getView（）中添加：

       holder.delete_btn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
    yourlist.remove(position);
    notifyDataSetChanged();
    }
});

Answer 2

实际上，您还需要选择项目位置来更改数据集（列表项）

所以您的getView();将

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


    ViewHolder holder;
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        .......
        holder.delete_btn = (Button) convertView.findViewById(R.id.delete_btn);
        holder.delete_btn.setOnClickListener(new View.OnClickListener() {@Override
            public void onClick(View view) {
                //selected item position
                int itemPosition=(int)view.getTag();
                //deletion stuff
                productArray.remove(position);
                notifyDataSetChanged();
            }
        });
        convertView.setTag(holder);

    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.delete_btn.setTag(position)//set item position 

    holder.name.setText(productArray.get(position).getName());
    .......
    return convertView;
}

已更新： 检查按钮onClick监听器方法。请参阅@Nikhil @nag

android如何单击listview项目中的按钮来删除该项目

2 个答案: