问题描述

点击按钮从 ListView中 删除一行

程序中的 ListView 的行包含一些 textviews 和一个按钮。当用户点击按钮时，我想删除父类
并把按钮从 ListView中 删除。如何在一个嵌套的方法（onClickListener）中访问自定义的 ArrayAdapter 的字段？我使用的是 View v。我是否要多次调用 v.getParent()，或者还有什么更好的方法？

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
     ViewHolder holder = null;
     Action item = this.getItem(position);
     if (convertView == null) {
        convertView = inflater.inflate(R.layout.action_holder_layout,
              parent, false);
        holder = new ViewHolder();
        holder.title = (TextView) convertView
              .findViewById(R.id.action_holder_title);
        holder.finishBtn = (Button) convertView
              .findViewById(R.id.finish_action_button);
        convertView.setTag(holder);
     } else
        holder = (ViewHolder) convertView.getTag();
     holder.title.setText(item.getActionName());
     holder.finishBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
           //REMOVE THE ACTION FROM THE ADAPTER'S ARRAYLIST
        }
     });
     return convertView;
  }

  static class ViewHolder {

     private TextView title;
     private Button finishBtn;
  }

解决方案

@Override
public int getCount(){
     return null!=list?list.size():0;
}

@Override
  public View getView(int position, View convertView, ViewGroup parent) {
     ViewHolder holder = null;
     Action item = this.getItem(position);
     if (convertView == null) {
        convertView = inflater.inflate(R.layout.action_holder_layout,
              parent, false);
        holder = new ViewHolder();
        holder.title = (TextView) convertView
              .findViewById(R.id.action_holder_title);
        holder.finishBtn = (Button) convertView
              .findViewById(R.id.finish_action_button);
        convertView.setTag(holder);
     } else
        holder = (ViewHolder) convertView.getTag();
     holder.title.setText(item.getActionName());
     holder.finishBtn.setTag(position);
     holder.finishBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
           //REMOVE THE ACTION FROM THE ADAPTER'S ARRAYLIST
           Object tag = v.getTag();
           if(null!=tag){
               list.remove((Integer)tag);
               notifyDataSetChanged();
           }
        }
     });
     return convertView;
  }

  static class ViewHolder {

     private TextView title;
     private Button finishBtn;
  }

解决方案二：

@Override
  public View getView(final int position, View convertView, ViewGroup parent) {
     ...
     holder.finishBtn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
           remove(position);
        }
     });
    ...
  }

  public void remove(int index) {
    // list.remove(index);
    ...
    notifyDataSetChanged();
  }