在可扩展列表android中引用子项内的按钮

Question

我的应用中有可扩展列表。它有多个子项，每个子项行需要有5个按钮。到目前为止，我已经取得了这么多成就。

问题是我从网络服务中得到一个计数，告诉我应该拥有的按钮总数。现在假设我得到的计数是24，所以将有5个子项目，每个子项目将有5个按钮可见，而最后一个孩子应该只有四个按钮可见（5 + 5 + 5 + 5 + 4 = 24）。

到目前为止，我能够获得正确数量的子项目，并且还可以获得最后一行中应该有多少个按钮。但是，问题是我不知道如何告诉ExpandableList专门显示/隐藏特定子项的按钮。因为如果我隐藏了一些按钮，那么按钮会隐藏在所有childItems中。例如。如果我隐藏第五个按钮，它会隐藏在所有子项中，而我只是希望它隐藏在最后一行/子项中。

我只是希望能够正确引用行/子项的按钮。

这是我的代码。

ArrayList<String> times = new ArrayList<String>();
HashMap<String, ArrayList<String>> timesChild = new HashMap<String, ArrayList<String>>();

ArrayList<String> firstname = new ArrayList<String>();
ArrayList<String> lastname = new ArrayList<String>();

填充上述变量，然后......

public class ExpandableListAdapter extends BaseExpandableListAdapter {
    private Context myContext;

    public ExpandableListAdapter(Context context) {
        myContext = context;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return null;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    public int getLastCount(int groupPosition) {
        int lastCount = timesChild.get(firstname.get(groupPosition)).size() % 5;
        return lastCount;
    }

    @Override
    public View getChildView(int groupPosition, final int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(
                    R.layout.appointmentstab2nextchildlist, null);
        }

        int count = getChildrenCount(groupPosition);
        int lastCount = getLastCount(groupPosition);

        Button b1 = (Button) convertView
                .findViewById(R.id.button1);
        Button b2 = (Button) convertView
                .findViewById(R.id.button2);
        Button b3 = (Button) convertView
                .findViewById(R.id.button3);
        Button b4 = (Button) convertView
                .findViewById(R.id.button4);
        Button b5 = (Button) convertView
                .findViewById(R.id.button5);

        for(int i=0; i<count; i++) {

            if(i == (count-1)) {
                if(lastCount == 1) {
                    b2.setVisibility(View.INVISIBLE);
                    b3.setVisibility(View.INVISIBLE);
                    b4.setVisibility(View.INVISIBLE);
                    b5.setVisibility(View.INVISIBLE);
                } else if(lastCount == 2) {
                    b3.setVisibility(View.INVISIBLE);
                    b4.setVisibility(View.INVISIBLE);
                    b5.setVisibility(View.INVISIBLE);
                } else if(lastCount == 3) {
                    b4.setVisibility(View.INVISIBLE);
                    b5.setVisibility(View.INVISIBLE);
                } else if(lastCount == 4) {
                    b5.setVisibility(View.INVISIBLE);
                }
            }
        }
        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        Log.d("child count is", Integer.toString(timesChild.get(firstname.get(groupPosition)).size()));
        int count = timesChild.get(firstname.get(groupPosition)).size() / 5;
        return count + 1;
    }

    @Override
    public Object getGroup(int groupPosition) {
        return firstname.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return firstname.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return 0;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(
                    R.layout.appointmentstab2nextlist, null);
        }

        TextView groupName = (TextView) convertView
                .findViewById(R.id.textView1);
        groupName.setText(firstname.get(groupPosition) + " " + lastname.get(groupPosition));

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}