Question

所以...我在使用CustomAdapter时遇到了一个奇怪的问题，这是我的代码：

public class QuilometragemCustomAdapter extends BaseAdapter {
    Context context;
    List<Quilometragem> quilometragens;
    Quilometragem km;

    public QuilometragemCustomAdapter(Context context, List<Quilometragem> list) {
        this.context = context;
        this.quilometragens = list;
    }

    @Override
    public int getCount() {

        return quilometragens.size();
    }

    @Override
    public Quilometragem getItem(int position) {

        return quilometragens.get(position);
    }

    @Override
    public long getItemId(int position) {

        return position;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup arg2) {
        int color = Color.argb(255,41,36,33);
        ViewHolder holder;
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if(convertView == null) {
            convertView = inflater.inflate(R.layout.list_row, null);
            holder = new ViewHolder();
            holder.veiculoTxt = (TextView) convertView.findViewById(R.id.veiculoTxt);
            holder.destinoTxt = (TextView) convertView.findViewById(R.id.dmTxt);
            holder.imageB = (ImageButton) convertView.findViewById(R.id.editButton);
            holder.imageB2 = (ImageButton) convertView.findViewById(R.id.deleteButton);
            TextView txtV = (TextView) convertView.findViewById(R.id.text2);
            TextView txtD = (TextView) convertView.findViewById(R.id.text3);
            txtV.setText("\nVeiculo:\n");
            txtD.setText("\nDestino:\n");
            holder.imageB.setBackgroundResource(R.drawable.ic_action_edit);
            holder.imageB2.setBackgroundResource(R.drawable.ic_action_cancel);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        holder.nkm =(TextView) convertView.findViewById(R.id.text1);
        holder.nkm.setText("\n" + quilometragens.get(position).getId()+ "\n");

        String veiculoTxt = quilometragens.get(position).getVeiculo();
        holder.veiculoTxt.setText("\n\n" + veiculoTxt + "           \n");
        holder.veiculoTxt.setTextColor(color);

        String destinoTxt = quilometragens.get(position).getDestino();
        holder.destinoTxt.setText("\n" + destinoTxt + "\n");
        holder.destinoTxt.setTextColor(color);

        return convertView;
    }


    private class ViewHolder {
            private TextView veiculoTxt;
            private TextView destinoTxt;
            private ImageButton imageB;
            private ImageButton imageB2;
            private TextView nkm;

    }
  }

我没有使用列表，我只为行创建了一个布局，所以我可以添加它，因为我在sqlite数据库中插入数据，但它仍然存在同样的问题。

问题是，我的布局只打印最后一个位置，我调试了一千次，我的“位置”始终为0，并且随着列表中的项目不断增加。如果列表中有3个项目，例如：ABC 123 QWE 321 IOP 456
它总是打印“IOP 456”它就像其他2个不在那里，我尝试用一个但是结果更糟，我尝试用do（）同时，它变得更糟。我认为问题出在View上，但我不确定。

Answer 1

你必须打电话 convertView.setTag（mHolder）; 在if条件结束时

Answer 2

试试这个......

{
    static class ViewHolder {
        private TextView veiculoTxt;
        private TextView destinoTxt;
        private ImageButton imageB;
        private ImageButton imageB2;
        private TextView nkm;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup arg2) {
        int color = Color.argb(255,41,36,33);
        ViewHolder holder;
        if(convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_row, null);
        }

            holder = new ViewHolder();
            holder.veiculoTxt = (TextView) convertView.findViewById(R.id.veiculoTxt);
            holder.destinoTxt = (TextView) convertView.findViewById(R.id.dmTxt);
            holder.imageB = (ImageButton) convertView.findViewById(R.id.editButton);
            holder.imageB2 = (ImageButton) convertView.findViewById(R.id.deleteButton);
            TextView txtV = (TextView) convertView.findViewById(R.id.text2);
            TextView txtD = (TextView) convertView.findViewById(R.id.text3);
            txtV.setText("\nVeiculo:\n");
            txtD.setText("\nDestino:\n");
            holder.imageB.setBackgroundResource(R.drawable.ic_action_edit);
            holder.imageB2.setBackgroundResource(R.drawable.ic_action_cancel);
            holder.nkm =(TextView) convertView.findViewById(R.id.text1);

        convertView.setTag(holder);

        holder.nkm.setText("\n" + quilometragens.get(position).getId()+ "\n");

        String veiculoTxt = quilometragens.get(position).getVeiculo();
        holder.veiculoTxt.setText("\n\n" + veiculoTxt + "           \n");
        holder.veiculoTxt.setTextColor(color);

        String destinoTxt = quilometragens.get(position).getDestino();
        holder.destinoTxt.setText("\n" + destinoTxt + "\n");
        holder.destinoTxt.setTextColor(color);

        return convertView;
    }
}

ListView仅打印最后位置

2 个答案: