如何与列表视图中的按钮交互

Question

我创建了一个customListview，我在其中插入了一个按钮..现在单击该button 我想开始新的activity..如何完成创建custom listview 的代码给出下面..谁能告诉我我如何与那个按钮交互来开始一个新的activity..

代码：

public static class ViewHolder
{
    Button butAddNew;
    TextView txtViewHeading;
    TextView  txtViewTitle;
    TextView  txtViewDescription;

}
public View getView(int position, View convertView, ViewGroup parent) 
{
    ViewHolder holder;

    if(convertView==null)
    {
        holder = new ViewHolder();
        convertView = inflater.inflate(R.layout.histryfrm_listview, null);
        holder.butAddNew =(Button) convertView.findViewById(R.id.butAddNew);
        holder.txtViewTitle =(TextView) convertView.findViewById(R.id.txtViewTitle);
        holder.txtViewDescription =(TextView) convertView.findViewById(R.id.txtViewDescription);
        holder.txtViewHeading =(TextView) convertView.findViewById(R.id.txtViewHeading);

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

    holder.txtViewTitle.setText(title[position]);
    holder.txtViewDescription.setText(description[position]);
    holder.txtViewHeading.setText(heading[position]);
    return convertView;
} 
}

Answer 1

当您创建它时，您始终可以将 onClickListener 从您的 Activity 发送到您的适配器。

否则，在您的适配器中设置一个侦听器，或者在项目的 xml 中使用 onClick。

当我做类似的事情时，我将我的活动 onclicklistener 传递给我的适配器。

编辑： 示例：

http://androidforbeginners.blogspot.com/2010/03/clicking-buttons-in-listview-row.html

或者更好：

Android: ListView elements with multiple clickable buttons

这完全取决于您将如何做。 但是另一个答案可能会起作用，只需传递正确的上下文即可。

Answer 2

你需要做这样的事情..

public static class ViewHolder
    {
        Button butAddNew;
        TextView txtViewHeading;
        TextView  txtViewTitle;
        TextView  txtViewDescription;

    }
public View getView(int position, View convertView, ViewGroup parent) 
{
    ViewHolder holder;

    if(convertView==null)
    {
        holder = new ViewHolder();
        convertView = inflater.inflate(R.layout.histryfrm_listview, null);
        holder.butAddNew =(Button) convertView.findViewById(R.id.butAddNew);
        holder.txtViewTitle =(TextView) convertView.findViewById(R.id.txtViewTitle);
        holder.txtViewDescription =(TextView) convertView.findViewById(R.id.txtViewDescription);
        holder.txtViewHeading =(TextView) convertView.findViewById(R.id.txtViewHeading);

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

    holder.txtViewTitle.setText(title[position]);
    holder.txtViewDescription.setText(description[position]);
    holder.txtViewHeading.setText(heading[position]);
    return convertView;
} 

    @Override
        protected void onListItemClick(ListView listView, View view, int position, long id) {
            super.onListItemClick(listView, view, position, id);
            LinearLayout l = (LinearLayout) listView.getChildAt(position);
                    //your code
                    //even this works fine if u don't have too many buttons
                      //u can call your activity here

}

Answer 3

在getView中设置holder.butAddNew.setOnClickListener很简单

holder.butAddNew.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Intent code for Start Activity
            }
        });

创建自定义适配器类的构造函数并在该构造函数中传递活动或上下文并将其用于启动活动。

更新

public View getView(int position, View convertView, ViewGroup parent) 

{
    ViewHolder holder;

if(convertView==null)
{
    holder = new ViewHolder();
    convertView = inflater.inflate(R.layout.histryfrm_listview, null);
    holder.butAddNew =(Button) convertView.findViewById(R.id.butAddNew);
    holder.txtViewTitle =(TextView) convertView.findViewById(R.id.txtViewTitle);
    holder.txtViewDescription =(TextView) convertView.findViewById(R.id.txtViewDescription);
    holder.txtViewHeading =(TextView) convertView.findViewById(R.id.txtViewHeading);

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

holder.txtViewTitle.setText(title[position]);
holder.txtViewDescription.setText(description[position]);
holder.txtViewHeading.setText(heading[position]);
holder.butAddNew.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(Context, activity.class));
            }
        });

return convertView;
}