Question

我尝试通过点击按钮编辑自定义列表视图中的数据。在Listener里面我编辑这行中的数据

data.get(position).setName("data");

数据被编辑，但是当我移动带有编辑数据的列表视图超出窗口范围时，我看到了变化，当我向后移动时，我看到了变化。我的目标是在单击按钮时查看此时的更改。这该怎么做？？在每行的ListView中，我有3个textview和1个按钮，我想编辑textview。

import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;

public class UserCustomAdapter extends ArrayAdapter<User> {

int layoutResourceId;
ArrayList<User> data = new ArrayList<User>();
private DataSource datasource;
private Context context;
 private Comment comment;
private String[] dane;
private UserHolder holder;
private User user;
public UserCustomAdapter(Context context, int layoutResourceId,
  ArrayList<User> data) {super(context, layoutResourceId, data);
 this.layoutResourceId = layoutResourceId;
 this.context = context;
 this.data = data;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
holder = null;

if (row == null) {
  LayoutInflater inflater = ((Activity) context).getLayoutInflater();
  row = inflater.inflate(layoutResourceId, parent, false);
  holder = new UserHolder();
  holder.textName = (TextView) row.findViewById(R.id.textView1);
  holder.textPrice = (TextView) row.findViewById(R.id.textView2);
  holder.textAttribute = (TextView) row.findViewById(R.id.textView3);
  holder.btnEdit = (Button) row.findViewById(R.id.button1);

  row.setTag(holder);
} else {
  holder = (UserHolder) row.getTag();
}
  user = data.get(position);
  holder.textName.setText(user.getName());
  holder.textPrice.setText(user.getPrice());
  holder.textAttribute.setText(user.getAttribute());
  holder.btnEdit.setOnClickListener(new OnClickListener() {

 @Override
public void onClick(View v) {

  /* datasource = new DataSource(getContext());
   datasource.open();

   comment = datasource.getComment("1");
   dane = comment.toString().split(" ");
    */
   data.get(position).setName("data");

    System.out.println(position);
    }
 });
return row;

}

static class UserHolder {
  TextView textName;
  TextView textPrice;
  TextView textAttribute;
  Button btnEdit;
 }
}

Answer 1

更新后使用notifyDataSetChanged方法

在自定义ListView中更新textview

1 个答案: