Question

I am using my custom adapter. There is a checkbox and a text view in each row.
But i have a problem. There are more items in the list than the number which fits on the screen.

So when i check any of the checkboxes on the screen and scroll down. The automatically get unchecked.

When i scroll up again some random checkboxes get checked.

I know that in getView() list is being refreshed again and again and theres an issue of the position.
But dont know the solution.

I have tried using a boolean array to keep a track. but dnt know how to do it properly.

cb.setOnCheckedChangeListener(new OnCheckedChangeListener(){
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView,
                                boolean isChecked) {

                                itemChecked[index]=isChecked;
                        }
                    });
                    cb.setChecked(itemChecked[index]);

Can you please post some code snippet and explain in detail. i am tired of searching this since last 2weeks… thanks in advance,..

Answer 1

    public View getChildView(final int groupPosition,
            final int childPosition, boolean isLastChild, View convertView,
            ViewGroup parent) {
        final ViewHolder holder;
        //if (convertView == null) {
            holder = new ViewHolder();
            convertView = mInflater.inflate(
                    R.layout.expandableinner_custom_row, null);

            holder.textView = (TextView) convertView
                    .findViewById(R.id.textView);
            holder.checkBox = (CheckBox) convertView
                    .findViewById(R.id.checkBox);
            String str = getChild(groupPosition, childPosition).toString();
            holder.textView.setText(str);
            Boolean[] boolArr = SMSActivity.maintaingState.get(String
                    .valueOf(groupPosition));
            Log.i("BOOLARRAYSIZE ", String.valueOf(boolArr.length));

            Log.i("Boolean",
                    String.valueOf(boolArr[childPosition] + "GrpPosition: "
                            + groupPosition + "ChildPosition: "
                            + childPosition));
            if (boolArr[childPosition]) {
                holder.checkBox.setChecked(true);
            } else {
                holder.checkBox.setChecked(false);
            }

                holder.checkBox
                        .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                            @Override
                            public void onCheckedChanged(
                                    CompoundButton buttonView,
                                    boolean isChecked) {
                                // TODO Auto-generated method stub

                                Boolean[] boolArr = SMSActivity.maintaingState
                                        .get(String.valueOf(groupPosition));
                                boolArr[childPosition] = isChecked;// (object)
                                Log.i("grpPosition",
                                        String.valueOf(childPosition));
                                Log.i("childPosition",
                                        String.valueOf(groupPosition));
                                SMSActivity.maintaingState.remove(String
                                        .valueOf(groupPosition));
                                SMSActivity.maintaingState.put(
                                        String.valueOf(groupPosition),
                                        boolArr);

                                Log.i("Boolean", String
                                        .valueOf(boolArr[childPosition]
                                                + " GrpPosition: "
                                                + groupPosition
                                                + "ChildPosition: "
                                                + childPosition));

                            }
                });

            convertView.setTag(holder);
        return convertView;

    }