java - 如何知道在哪个项目中单击了按钮

Question

到目前为止，我有一个带有自定义适配器的 ListView ，列表中的每个项目都有一个按钮。 我真的很困惑；我正在尝试执行以下操作:

当用户单击列表中项目中的按钮(删除按钮)时，我想知道单击了哪个项目按钮，以便我知道要删除哪个项目 - 我该如何实现？我看过一些关于设置标签的内容，但我仍然很迷茫。

我还尝试从我的主要 Activity 的列表布局中访问该按钮，但无法引用它。

请给我详细说明如何做我想做的事情，谢谢。

添加适配器代码:

public class LocationAdapter extends BaseAdapter{
String [] n;
Context context;
String[] a;

private static LayoutInflater inflater=null;
public LocationAdapter(MainActivity mainActivity, String[] names, String[] addresses) {
    // TODO Auto-generated constructor stub
    n=names;
    context=mainActivity;
    a=addresses;
    inflater = ( LayoutInflater )context.
            getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
    // TODO Auto-generated method stub
    return n.length;
}

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

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

public class Holder
{
    TextView name;
    TextView address;
    ImageButton ib;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    Holder holder=new Holder();
    View rowView;
    rowView = inflater.inflate(R.layout.rowlayout2, null);
    holder.name =(TextView) rowView.findViewById(R.id.EditTextName);
    holder.address =(TextView) rowView.findViewById(R.id.EditTextAddress);
    holder.ib = (ImageButton) rowView.findViewById(R.id.Delete);
    holder.name.setText(n[position]);
    holder.address.setText(a[position]);
    holder.ib.setTag(convertView);
    rowView.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Toast.makeText(context, "You Clicked "+n[position], Toast.LENGTH_LONG).show();
        }

    });
    return rowView;
}

}

Answer 1

为您的删除按钮实现一个OnClickListener。

当点击delete按钮时，删除数据源中position的行，然后调用notifyDataSetChanged()

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    Holder holder=new Holder();
    View rowView;
    rowView = inflater.inflate(R.layout.rowlayout2, null);
    holder.name =(TextView) rowView.findViewById(R.id.EditTextName);
    holder.address =(TextView) rowView.findViewById(R.id.EditTextAddress);
    holder.ib = (ImageButton) rowView.findViewById(R.id.Delete);
    holder.name.setText(n[position]);
    holder.address.setText(a[position]);
    holder.ib.setTag(convertView);

    //Add this for on-click of delete button
    holder.ib.setOnClickListener(new OnClickListener(){
         //Delete the row in your data source specified at position

    });

    rowView.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Toast.makeText(context, "You Clicked "+n[position], Toast.LENGTH_LONG).show();
        }

    });
    return rowView;
}