Android - ขอรบกวนสอบถามเรื่องการใช้งาน StickyHeaderListview ค่ะ ต้องการให้ show or hidden list เมื่อคลิก header นั้น ๆ

public class MainActivity extends FragmentActivity implements
        AdapterView.OnItemClickListener, StickyListHeadersListView.OnHeaderClickListener {

    private TestBaseAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mAdapter = new TestBaseAdapter(this);

        StickyListHeadersListView stickyList = (StickyListHeadersListView) findViewById(R.id.list);
        stickyList.setOnItemClickListener(this);
        stickyList.setOnHeaderClickListener(this);

        stickyList.setEmptyView(findViewById(android.R.id.empty));

        stickyList.setDrawingListUnderStickyHeader(true);
        stickyList.setAreHeadersSticky(true);

        stickyList.setAdapter(mAdapter);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.restore:
                mAdapter.restore();
                return true;
            case R.id.update:
                mAdapter.notifyDataSetChanged();
                return true;
            case R.id.clear:
                mAdapter.clear();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onHeaderClick(StickyListHeadersListView l, View header, int itemPosition, long headerId, boolean currentlySticky) {
        Toast.makeText(this, "itemPosition " + itemPosition  +" \ncurrentlySticky ? " + currentlySticky,
                Toast.LENGTH_SHORT).show();
   }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        Toast.makeText(this, "Item " + i + " clicked!",
                Toast.LENGTH_SHORT).show();
    }