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copied!<p><code>ChildView getView()</code> this method, when your judge convertview equals null, you must <code>convertview.setTag(viewHolder)</code>. When your clicked parent view second, the convertview is not equals null, your must use this <code>viewholder= (ViewHolder)convertview.getTag()</code>; </p> <pre><code> public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View view = convertView; ChildViewHolder viewHolder = null; if (view == null) { LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.member_childitem2, null); viewHolder = new ChildViewHolder(); viewHolder.checkBox1 = (CheckBox)view.findViewById(R.id.checkbox1); viewHolder.checkBox2 = (CheckBox)view.findViewById(R.id.checkbox2); viewHolder.checkBox3 = (CheckBox)view.findViewById(R.id.checkbox3); viewHolder.checkBox4 = (CheckBox)view.findViewById(R.id.checkbox4); viewHolder.checkBox5 = (CheckBox)view.findViewById(R.id.checkbox5); viewHolder.checkBox6 = (CheckBox)view.findViewById(R.id.checkbox6); view.setTag(viewHolder); }else{ viewHolder = (ChildViewHolder) view.getTag(); } Button btn_submit = (Button)view.findViewById(R.id.btn_submit); View groupView = cachedGroupView.get(childPosition); final GroupViewHolder groupViewHolder = (GroupViewHolder) groupView.getTag(); btn_submit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(context, groupPosition+ ":" + childPosition, Toast.LENGTH_SHORT).show(); groupViewHolder.groupStatus.setImageResource(R.drawable.indicator_close); } }); return view; } </code></pre>

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