Getting a reference to a child Fragment after the parent Fragment has been recreated

Question

Starting Android 4.2, Android supports nested Fragments. The doc doesn\'t give a lot of explanations regarding nested Fragment lifecycles but from experience, it ap

Answer 1

are u using FragmentPagerAdapter? if not try FragmentPagerAdapter instead of FragmentStatePagerAdapter I realised that have some bug when using FragmentStatePagerAdapter when i have 4 level nest. Sorry my english is poor.

@Override
public void onCreate(Bundle savedInstanceState) {
    if (savedInstanceState != null) {
     mFragment1 = getFragmentManager().getFragment(savedInstanceState, STATE_Fragment1);
     mFragment2 = getFragmentManager().getFragment(savedInstanceState, STATE_Fragment2);
     mFragment3 = getFragmentManager().getFragment(savedInstanceState, STATE_Fragment3);
    } else {
     mFragment1 = SomeFragment.newInstance("param1");
     mFragment2 = SomeFragment.newInstance("param2");
     mFragment3 = SomeFragment.newInstance("param3");
    }
    super.onCreate(savedInstanceState);
    mMyPagerAdapter = new MyPagerAdapter(getChildFragmentManager(), mFragment1, mFragment2, mFragment3);
}

@Override
public void onSaveInstanceState(Bundle outState) {
    if (mFragment1 != null) {
        getFragmentManager().putFragment(outState, STATE_Fragment1,
                mFragment1);
    }

    if (mFragment2 != null) {
        getFragmentManager().putFragment(outState, STATE_Fragment2,
                mFragment2);
    }

    if (mFragment3 != null) {
        getFragmentManager().putFragment(outState, STATE_Fragment3,
                mFragment3);
    }

    super.onSaveInstanceState(outState);
}