Question

我正在尝试编写BaseAdapter代码，我希望在每个onClickListener上获取ViewHolder标记ID，但在每个索引中我都没有获得ViewHolder标记ID，它总是给出第一个ViewHolder标记ID。如果那么将有10个项目，如果我点击第3个项目然后也在Toast消息中我从第一个获得Id。但是在TextView中，id正确显示。

MyCode：

public class MyAdapter extends BaseAdapter{

Activity activity;
Context context;
ArrayList<String> dataList;

public MyAdapter(Activity activity, Context context,ArrayList<String> dataList) 
{
    this.activity = activity;
    this.context = context;
    this.dataList = dataList;

}

@Override
public int getCount() {
    // TODO Auto-generated method stub
        return dataList.size();
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
        return dataList.get(position);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return dataList.size();
}

public class ViewHolder {
    TextView data_txt

}

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

    LayoutInflater mInflater = (LayoutInflater)context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    holder = new ViewHolder();

    if(convertView==null){

        convertView = mInflater.inflate(R.layout.data_layout, parent,false);    
        holder.data_txt = (TextView) convertView.findViewById(R.id.data);
        convertView.setTag(holder);

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

    holder.data_txt.setText(""+holder);     

    holder.data_txt.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Toast.makeText(context, ""+holder, Toast.LENGTH_SHORT).show();

            }
    });

    return convertView; 
} }

所以，我的问题是如何在Toast消息中获取特定的持有者ID。请告诉我，建议我一些好的解决方案。

Answer 1

将此字段添加到ViewHolder：

 public class ViewHolder {
   TextView data_txt
   int position;
 }

更改getView（）中的代码：

    if(convertView==null){
        holder = new ViewHolder();
        LayoutInflater mInflater = (LayoutInflater)context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = mInflater.inflate(R.layout.data_layout, parent,false);
        holder.data_txt = (TextView) convertView.findViewById(R.id.data);
        holder.position = position;
        convertView.setTag(holder);
        convertView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                int position = ((ViewHolder)(v.getTag)).position;
                Toast.makeText(context, Integer.toString(position), Toast.LENGTH_SHORT).show();
            }
        });
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.data_txt.setText(""+ Integer.toString(position));
    holder.position = position;

如何为Android中的每个索引获取BaseAdapter getTag id？

1 个答案: