无法在光标适配器的绑定视图重写中获取视图的id

Question

我正在使用自定义适配器，它扩展了用于在listview中显示数据的CursorAdapter。为了显示特定的电话号码，我想要一个id，所以我尝试在单击事件中获取它。我在bind方法中设置了单击侦听器，如下所示

right.setOnClickListener(new View.OnClickListener() 
   {
        @Override
        public void onClick(View v) 
        {
            a = v1.getId();
            String num=dh.getNumberFromId(a);
        }
   });

我没有从getId()调用中获得正确的视图id，因此无法从db中获得电话号码。

完整的代码在这里：

public class CallSchedulerCustomAdapter2 extends CursorAdapter
{    
  DbHelper dh;

public Context con;
public LayoutInflater inflater;
int nameindex,phoneindex,emailindex,smsindex,msubindex,mbodyindex, column_id;
TextView text1,text2,text3;
int a;   String s1;



@SuppressWarnings("static-access")
public CallSchedulerCustomAdapter2(Context con, Cursor c  )
{
    super(con, c);
    // TODO Auto-generated constructor stub
    this.con = con;
    nameindex = c.getColumnIndex(dh.contactname);
    phoneindex = c.getColumnIndex(dh.contactnumber);
    emailindex = c.getColumnIndex(dh.contactmailid);
    smsindex=c.getColumnIndex(dh.contactsms);
    msubindex=c.getColumnIndex(dh.contactmailsub);
    mbodyindex=c.getColumnIndex(dh.contactmailbody);
    column_id= c.getColumnIndex("_id");
    this.inflater = (LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

    public static Cursor c;
@SuppressWarnings("static-access")
@Override
public void bindView( View view,   Context context, Cursor cursor) 
{     

    // TODO Auto-generated method stub
    v1=view;
     c=cursor;
    text1= (TextView)view.findViewById(R.id.unschedulecontactnametv);
    text2= (TextView)view.findViewById(R.id.unschedulecontactnumbertv);
    text3= (TextView)view.findViewById(R.id.unschedulecontactmailidtv);
     String s = c.getString(cursor.getColumnIndex(dh.contactname));
       text1.setText(s);


    text1.setText(cursor.getString(nameindex));
    text2.setText(cursor.getString(phoneindex));
    text3.setText(cursor.getString(emailindex));
    View right = view.findViewById(R.id.callb1);
    dh = new DbHelper(context); 

    right.setOnClickListener(new View.OnClickListener() 
       {
        @Override
        public void onClick(View v) 
        {
            // TODO Auto-generated method stub
               a = v1.getId();
             String num=dh.getNumberFromId(a);

        }
       });
  }

Answer 1

您的v1是在哪里声明的？但是这样想:你在listview中点击你的视图。方法onClick()被调用，但v1有一个上次分配给它的值，而不是为该特定视图执行bindView()时分配给它的值。一种解决方案是将id放在视图的tag属性中。

Answer 2

不要使用view.id来存储数据/引用。使用view.tag，你可以存储任何类型的对象。

 public void bindView( View view,   Context context, Cursor cursor) 
{     

MyDataHolder data = new MyDataHolder(cursor, "whatever");
 view.setTag(data);

....
}



right.setOnClickListener(new View.OnClickListener() 
     {
      @Override
      public void onClick(View v) 
      {

           int viewId = v.getId();
           MyDataHolder data = (MyDataHolder)v.getTag()
           if (R.id.xxxx == viewId) { // not a good idea
         }
           if (data.whatever == xxx) { // much better !!
         }

    }
   });