Question

我有一个很长的列表视图，我试图改变特定单元格中的颜色，例如position == 0，它工作正常。但是当我向下滚动列表时，之前屏幕外的另一个单元格也会发生变化。任何的想法？谢谢你的帮助

public class CheckWinNoAdapter extends ArrayAdapter<String> {
private final Context context;
private String[] values;
TextView tvMain;




public CheckWinNoAdapter(Context context, String[] values) {
    // TODO Auto-generated constructor stub
    super(context, R.layout.list_draw, values);
    this.context = context;
    this.values = values;

}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        convertView = inflater.inflate(R.layout.list_draw, parent, false);
    }

    tvMain = (TextView) convertView.findViewById(R.id.chk_main);
    tvMain.setText(values[position]);



    if(position ==0){
        tvMain.setTextColor(Color.BLUE);
    }

    return convertView;

Answer 1

您正在通过重复使用convertView来回收视图，您必须始终在getView()中设置颜色，例如

if (position == 0) {
    tvMain.setTextColor(Color.BLUE);
} else {
    // set color back to original color
    tvMain.setTextColor(Color.BLACK);
}

请参阅http://lucasr.org/2012/04/05/performance-tips-for-androids-listview/

Answer 2

好的，我现在自己弄清楚，而不是ding if（convertView == null）{} 我用

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



    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView = inflater.inflate(R.layout.list_draw, parent, false);
        TextView tvMain = (TextView) rowView.findViewById(R.id.chk_main);
return rowView;

所以不要在rowView中回收视图。

为什么当我设置一个要更改的单元格时，列表视图中的另一个单元格也会改变颜色？

2 个答案: