ViewHolder Pattern - ListView - 项目的背景颜色未正确设置

时间:2014-03-29 04:07:35

标签: android android-listview

我有自定义适配器的列表视图。列表视图中唯一的项目是TextView(现在)。当我单击TextView时,背景颜色应该变为蓝色,当我再次单击它时,背景颜色应该更改为默认颜色(浅灰色)。我试图使用ViewHolder Pattern实现这一点。

现在的问题是,当我点击列表中的第一项时,一些随机项的背景颜色变为蓝色。

CustomAdapter类:

public class ResultsAdapter extends BaseAdapter {

    ViewHolder holder;

    @Override
    public int getCount() {
        return dummyText.length;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

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

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

        if (convertView == null) {
            convertView = getActivity().getLayoutInflater().inflate(
                    R.layout.item_mtf_results, parent, false);

            holder = new ViewHolder();
            holder.txtViewResults = (TextView) convertView
                    .findViewById(R.id.textview_item_mtf_results);

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

        holder.txtViewResults.setText(dummyText[position]);

        holder.txtViewResults.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Log.d(Const.DEBUG, "in onClick Method");
                Log.d(Const.DEBUG, "Is checked ? = " + holder.isChecked);

                String result = holder.txtViewResults.getText().toString();
                listener.onResultClick(result);

                if (holder.isChecked) {

                    Log.d(Const.DEBUG, "isChecked = true");

                    holder.txtViewResults.setBackgroundColor(getResources()
                            .getColor(R.color.light_grey));
                    holder.txtViewResults.setTextColor(getResources()
                            .getColor(R.color.black));
                    holder.isChecked = false;

                    Log.d(Const.DEBUG,
                            "Holder is set to false..  checked ? = "
                                    + holder.isChecked);

                } else {

                    Log.d(Const.DEBUG, "isChecked = false");

                    holder.txtViewResults.setBackgroundColor(getResources()
                            .getColor(R.color.blue));
                    holder.txtViewResults.setTextColor(getResources()
                            .getColor(R.color.white));
                    holder.isChecked = true;

                    Log.d(Const.DEBUG,
                            "Holder is set to true..  checked ? = "
                                    + holder.isChecked);
                }

            }
        });

        return convertView;
    }

}

ViewHolder类:

public static class ViewHolder {
    TextView txtViewResults;
    boolean isChecked = false;
}

如果您需要任何其他代码,请告诉我......

1 个答案:

答案 0 :(得分:0)

尝试在converview==null块内添加文本视图的单击侦听器。每次滚动列表视图时都会设置监听器。