Restore saveInstanceState to Fragments onCreate method

I made a test application to see how to save InstanceState

.

We now have a main fragment activity and two tabs. I have a variable in Main Activity that it assigns in a method onCreate

.. and I would like to share it with snippets.

So, I created a public method in the main activity to call it inside fragments when I need the value of this variable. ((TMainActivity) getActivity()).getTestString()

The problem is the device is rotated. I got the default for the string, not the stored value.

And this is obvious because it onRestoreInstanceState

is called after the onCreate

fragments.

Now how can I fix this?

TMainActivity.java

public class TMainActivity extends FragmentActivity {

    final private static String TAG = "TMainActivity";
    final private static String EXTRA_TEST = "MAIN_KEY";

    private CollectionPagerAdapter mCollectionPagerAdapter;
    private ViewPager mainPager;

    private String test = "Default";

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

        Log.v(TAG, "onCreate() Before test= " + test);

        if (savedInstanceState == null) {
            test = "New";
        } else {
            test = savedInstanceState.getString(EXTRA_TEST) + " - Restored";
        }

        Log.v(TAG, "onCreate() After test= " + test);

        mainPager = (ViewPager) findViewById(R.id.main_pager);

        mCollectionPagerAdapter = new CollectionPagerAdapter(getSupportFragmentManager());
        mainPager.setAdapter(mCollectionPagerAdapter);
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        Log.v(TAG, "onSaveInstanceState()");

        outState.putString(EXTRA_TEST, test);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        Log.v(TAG, "onRestoreInstanceState()");
        Log.v(TAG, "onRestoreInstanceState() savedInstanceState=" + (savedInstanceState != null));

        test = savedInstanceState.getString(EXTRA_TEST);
    }

    public String getTestString() {
        return test;
    }

    private class CollectionPagerAdapter extends FragmentStatePagerAdapter {
        public CollectionPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            Fragment fragment = null;

            switch (i) {
            case 0:
                fragment = new Tab1Fragment();
                break;
            case 1:
                fragment = new Tab2Fragment();
                break;
            }

            return fragment;
        }

        @Override
        public int getCount() {
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return "OBJECT " + (position + 1);
        }
    }

}

      

        
        
        
      

    

Tab1Fragment.java

public class Tab1Fragment extends Fragment {

    final private static String TAG = "Tab1Fragment";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Log.v(TAG, "onCreate()");
        Log.v(TAG, "getTestString()=" + ((TMainActivity) getActivity()).getTestString());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main_tab1, container, false);
        return rootView;
    }

}

      

        
        
        
      

    

Tab2Fragment.java

public class Tab2Fragment extends Fragment {

    final private static String TAG = "Tab2Fragment";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Log.v(TAG, "onCreate()");
        Log.v(TAG, "getTestString()=" + ((TMainActivity) getActivity()).getTestString());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main_tab2, container, false);

        return rootView;
    }

}