Question

我有一个自定义的BaseAdapter，该行中有一些视图主要是一个复选框（ImageView）和按钮（ImageView）和隐藏文本（TextView）每当我点击复选框时，我想改变它的绘图，它似乎有效，但只有当我notifyDataSetChanged时 - 哪个IMO无关紧要。如果我删除该行，它有时会工作，有时不起作用更重要的部分是我希望按钮显示/隐藏holder.expansion但它不起作用。无论v.getTag()我还尝试使用holder.expansion，但它也无效。

我怎样才能让它发挥作用？要更改复选框drawable和显示/隐藏扩展文本吗？

@Override
public View getView(int position, View view, ViewGroup parent)
{
    final DrugHolder holder;
    if (view == null)
    {
        holder = new DrugHolder();
        view = inflater.inflate(R.layout.drug_list_row, null);
        holder.name = (TextView) view.findViewById(R.id.drug_list_name);
        holder.checkbox = (ImageView) view.findViewById(R.id.drug_list_checkbox);
        holder.arrow = (LinearLayout) view.findViewById(R.id.drug_list_arrow_button);
        holder.expansion = (LinearLayout) view.findViewById(R.id.drug_list_expansion);
        holder.fullName = (TextView) view.findViewById(R.id.drug_list_full_name);
        holder.quantity = (TextView) view.findViewById(R.id.drug_list_quantity);
        holder.unitDose = (TextView) view.findViewById(R.id.drug_list_unit_dose);

        view.setTag(holder);
    }
    else
    {
        holder = (DrugHolder) view.getTag();
    }
    int colorPos = position % colors.length;
    view.setBackgroundColor(colors[colorPos]);

    Drug drug = allItems.get(position);
    holder.name.setText(drug.Name);
    holder.fullName.setText(drug.Name);
    holder.quantity.setText(String.format(Locale.GERMANY, "%.2f", drug.Quantity));
    holder.unitDose.setText(drug.DoseType);
    holder.arrow.setTag(holder.expansion);

    holder.checkbox.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            ImageView view = (ImageView) v;
            if (view.isSelected())
            {
                view.setSelected(false);
                view.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_unchecked));
            }
            else
            {
                view.setSelected(true);
                view.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_checked));
            }
            notifyDataSetChanged();
        }
    });

    holder.arrow.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            LinearLayout view = (LinearLayout) v.getTag();
            if (view.getVisibility() == View.VISIBLE)
            {
                view.setVisibility(View.GONE);
            }
            else
            {
                view.setVisibility(View.VISIBLE);
            }
            notifyDataSetChanged();
        }
    });

    return view;
}

根据改变的提议我做了这个：

    if (drug.isChecked()) //Here breakpoint - enters only when entering activity
    {
        holder.checkbox.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_checked));
    }
    else
    {
        holder.checkbox.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_unchecked));
    }
    if (drug.isExpanded())
    {
        holder.fullName.setVisibility(View.VISIBLE);
    }
    else
    {
        holder.fullName.setVisibility(View.GONE);
    }

    holder.checkbox.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            drug.setChecked(!drug.isChecked()); // Breakpoint - enters when clicks
            notifyDataSetChanged(); // After F8 goes to this line but never goes to getView again
        }
    });

    holder.arrow.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            drug.setExpanded(!drug.isExpanded()); // Breakpoint - enters when click
            notifyDataSetChanged(); // Never goes to this line after F8 - instead it jumps to View.java and shows red block with 'Source code does not match byte code
        }
    });

Answer 1

您需要在Drug中保存有关已检查状态的信息，并在将数据设置为视图时检查此状态。例如

if (drug.isChecked()) {
holder.checkbox.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_checked));
} else {
holder.checkbox.setImageDrawable(context.getDrawable(R.drawable.ic_icon_checkbox_unchecked));
}

OnClickListener不会更改Custom BaseAdapter中的视图

1 个答案: