public void update(int index) {
    this.getView().setId(R.layout.search);
}

@Override
    public void onListItemSelected(int index) {
        SampleViewerFragment iv = (SampleViewerFragment) getSupportFragmentManager()
                .findFragmentById(R.id.image_viewer_fragment);

        if (iv == null || !iv.isInLayout()) {
            Intent showImage = new Intent(getApplicationContext(),
                    SampleViewerActivity.class);
            showImage.putExtra("index", index);
            startActivity(showImage);
        } else {
            iv.update(index);
        }
    }