每行带有 RadioGroup 的 ListView [英] ListView with RadioGroup in each row

问题描述

上面显示的是我的带有 TextViews 和 RadioGroup 的自定义列表视图.根据项目状态是待处理"还是已服务"，我更新待处理的项目-TextView(红色，在顶部).一切都按预期工作，我能够在滚动时保留 RadioGroup 选择.

Above shown is my custom listview with TextViews and RadioGroup. Based on whether the item status is "pending" or "served" I update the pending items-TextView (in red, on top). Everything is working as expected, and I am able to retain the RadioGroup selections on scroll.

但是，当我滚动时，待处理的 Items TextView 不会保留其值.每当列表滚动时它就会改变.这是我的 getView 方法.

However, when I scroll, the pending Items TextView does not retain its value. It changes whenever the list scrolls. Here is my getView method.

public View getView(final int position, View convertView, ViewGroup parent) 
{
    System.out.println(" --- position ---"+position+" --- isChecked[position] --- "+isChecked[position]);

    ViewHolder viewHolder = null;
    if(convertView == null)
    {

        convertView = layoutInflater.inflate(R.layout.order_status_listview_row, null);
        viewHolder = new ViewHolder();
        convertView.setTag(viewHolder);
    }
    else
    {
        viewHolder = (ViewHolder)convertView.getTag();
        convertView.setTag(viewHolder);
    }

    viewHolder.itemName = (TextView)convertView.findViewById(R.id.textview_order_status_item_name);
    viewHolder.itemQuantity = (TextView)convertView.findViewById(R.id.textview_order_status_item_quantity);
    viewHolder.radioGroup = (RadioGroup)convertView.findViewById(R.id.radiogroup_order_status_dialog);

//      isUserChanged[position] = false;
    viewHolder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() 
    {           
        public void onCheckedChanged(RadioGroup group, int checkedId) 
        {
 //             if(isUserChanged[position])
            {
                switch(checkedId) 
                {
                    case R.id.radiobutton_served:
                         System.out.println(" --- radiobutton_served ---"+" position "+position+" isChecked[position] "+isChecked[position]);
                         count--;
 //                          countView.setText(DataHelper.getAppropriateCountValue(count));
                         isChecked[position] = true;
                         break;

                    case R.id.radiobutton_pending:
                         System.out.println(" --- radiobutton_pending ---"+" position "+position+" isChecked[position] "+isChecked[position]);
                         isChecked[position] = false;
                         count++;
 //                          countView.setText(DataHelper.getAppropriateCountValue(count));
                         break;             
                }
                countView.setText(DataHelper.getAppropriateCountValue(count));

            }
 //             isUserChanged[position] = false;
        }
    });

    viewHolder.radioGroup.setOnClickListener(new OnClickListener() 
    {
        public void onClick(View view) 
        {
 //             isUserChanged[position] = true;
        }
    }); 

    viewHolder.itemName.setText(orderList.get(position).getDishName());
    viewHolder.itemQuantity.setText(orderList.get(position).getDishQuantity());

    // change selection state for item checked when selection for radioButton changes
    if(isChecked[position])
        viewHolder.radioGroup.check(R.id.radiobutton_served);
    else
        viewHolder.radioGroup.check(R.id.radiobutton_pending);

    return convertView;
}

推荐答案

我想我明白了.每当您滚动时，您都可以使用您的

I think I got it. Whenever you scroll, you change the values or your radiobuttons with your

if(isChecked[position])
    viewHolder.radioGroup.check(R.id.radiobutton_served);
else
    viewHolder.radioGroup.check(R.id.radiobutton_pending);

但是你在调用之前设置了一个监听器.所以每次都会调用监听器.

But you set a listener BEFORE you call that. So the listener is called each time.

试试这个:

viewHolder.radioGroup.setOnCheckedChangeListener(null);

if(isChecked[position])
    viewHolder.radioGroup.check(R.id.radiobutton_served);
else
    viewHolder.radioGroup.check(R.id.radiobutton_pending);

viewHolder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() 
    {           
        public void onCheckedChanged(RadioGroup group, int checkedId) 
        {
 //             if(isUserChanged[position])
            {
                switch(checkedId) 
                {
                    case R.id.radiobutton_served:
                         System.out.println(" --- radiobutton_served ---"+" position "+position+" isChecked[position] "+isChecked[position]);
                         count--;
 //                          countView.setText(DataHelper.getAppropriateCountValue(count));
                         isChecked[position] = true;
                         break;

                    case R.id.radiobutton_pending:
                         System.out.println(" --- radiobutton_pending ---"+" position "+position+" isChecked[position] "+isChecked[position]);
                         isChecked[position] = false;
                         count++;
 //                          countView.setText(DataHelper.getAppropriateCountValue(count));
                         break;             
                }
                countView.setText(DataHelper.getAppropriateCountValue(count));

            }
 //             isUserChanged[position] = false;
        }
    });

希望这会对你有所帮助.

Hope this will help you.

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