如何讓數組的大小隻有當複選框被選中

Question

喜即時通訊新到Android IM擴展列表上的工作，我有複選框的子列表，所以我需要只顯示選中的項目規模我怎麼能做到這一點,,, ，在此先感謝

expListView.setOnChildClickListener(new OnChildClickListener() { 

      @Override 
      public boolean onChildClick(ExpandableListView parent, View v, 
        int groupPosition, int childPosition, long id) { 
       // TODO Auto-generated method stub 
        CheckBox cb = (CheckBox)v.findViewById(R.id.check1); 
        cb.getText().toString(); 
        System.out.println("......"+cb); 

        if(cb != null) 
         cb.toggle(); 
       Toast.makeText(
         getApplicationContext(), 
listDataHeader.get(groupPosition)+ " : "+ listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition), Toast.LENGTH_SHORT).show(); 
selected=listDataHeader.get(groupPosition)+ " : "+ listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition); 
       System.out.println("value of" + selected); 
       String a1=listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition); 
       limits.add(selected); 
       //String a= selected.toString(); 
       int si= limits.size(); 
       tv1.setText(a1); 
       tv2.setText(""+si); 
       System.out.println("length..."+si); 
       return false; 
      } 
     }); 

Answer 1

實現這個接口在類OnCheckedChangeListener

class Abc implements OnCheckedChangeListener { 

expListView.setOnChildClickListener(new OnChildClickListener() { 

      @Override 
      public boolean onChildClick(ExpandableListView parent, View v, 
        int groupPosition, int childPosition, long id) { 
       // TODO Auto-generated method stub 
        CheckBox cb = (CheckBox)v.findViewById(R.id.check1); 
        cb.getText().toString(); 
        System.out.println("......"+cb); 

        if(cb != null) 
         cb.toggle(); 
       Toast.makeText(
         getApplicationContext(), 
listDataHeader.get(groupPosition)+ " : "+ listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition), Toast.LENGTH_SHORT).show(); 
selected=listDataHeader.get(groupPosition)+ " : "+ listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition); 
       System.out.println("value of" + selected); 
       String a1=listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition); 
       limits.add(selected); 
       //String a= selected.toString(); 
       int si= limits.size(); 
       tv1.setText(a1); 
       tv2.setText(""+si); 
       System.out.println("length..."+si); 
       return false; 
      } 
     }); 
    @Override 
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
      // TODO Auto-generated method stub 
       your code here 

     } 
    }