Android Fragment Manager Example

    private class MyPagerAdapter extends FragmentPagerAdapter {
    private FragmentManager fm;

        public MyPagerAdapter(FragmentManager fm) {
            super(fm);
        this.fm = fm;
        }

        @Override
        public Fragment getItem(int pos) {
        Fragment fragment = fm.findFragmentByTag("android:switcher:" + viewPager.getId() + ":" + getItemId(pos));

        // Return the fragment if it was stored in the fragment manager
            if (fragment != null) {
                return fragment;
            }

            // Get a new instance of the target fragment
            switch(pos) {
            case 0: return FirstFragment.newInstance("FirstFragment, Instance 1");
            case 1: return SecondFragment.newInstance("SecondFragment, Instance 1");
            case 2: return ThirdFragment.newInstance("ThirdFragment, Instance 1");
            case 3: return ThirdFragment.newInstance("ThirdFragment, Instance 2");
            case 4: return ThirdFragment.newInstance("ThirdFragment, Instance 3");
            default: return ThirdFragment.newInstance("ThirdFragment, Default");
            }
        }

        @Override
        public int getCount() {
            return 5;
        }
    }