I'd like to inquire about the Android adapter.

private class MenuPagerAdapter extends PagerAdapter {

    private LayoutInflater menuLayoutInflater;
    private ListView listView;

    public MenuPagerAdapter(Context context) {
        menuLayoutInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return 3;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view.equals(object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {

        View view = null;

        switch (position){
            case 0 :
                view = menuLayoutInflater.inflate(R.layout.activity_menu1, null);
                break;
            case 1 :
                view = menuLayoutInflater.inflate(R.layout.activity_menu2, null);
                break;
            case 2 :
                view = menuLayoutInflater.inflate(R.layout.activity_menu3, null);
                break;
        }

        container.addView(view);

        return view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

}