Android - Fragment screen rotate

Question

I'have 1 FragmentActivity with a ViewPager which handle 2 Fragments.


public class MyFragmentActivity extends FragmentActivity{

private Fragment f1;
private Fragment f2;
private ViewPager myPager;
private MyFragmentAdapter mFragmentsAdapter;
private static ArrayAdapter<Fragment> mFragmentArray;

public void onCreate(Bundle icicle) {
    super.onCreate(icicle); 
setContentView(R.layout.my_layout); 
myViewPager = (ViewPager) findViewById(R.id.pager_acciones);

mFragmentArray = new ArrayAdapter<Fragment>(getApplicationContext(),android.R.layout.simple_list_item_1);
f1 = new Fragment();
    f1 = new Fragment();

mFragmentArray.add(f1);
mFragmentArray.add(f2);

mFragmentsAdapter = new MyFragmentAdapter(getSupportFragmentManager());
myPager.setAdapter(mFragmentsAdapter);
myPartidoPager.setCurrentItem(0);


}


public static class MyFragmentAdapter extends FragmentPagerAdapter {
    public AccionesFragmentAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public int getCount() {

        return mFragmentArray.getCount();
    }

    @Override
    public Fragment getItem(int position) {

        return mFragmentArray.getItem(position);
    }


}

My problem is that every time the screen orientation changes, the activity is created and also the Fragments. I don't mind if the activity is created again, but I don't want the Fragments to be recreated.

I found the solution [here](http://stackoverflow.com/questions/7951730/viewpager-and-fragments-whats-the-right-way-to-store-fragments-state) Thanks @oneilse14 for your answer anyway. — gutiory, Jan 29 '12 at 19:37

score 14 · Answer 1 · edited Dec 19 '12 at 12:05

The easiest way is to throw a if statement right after the on create method is called and check to see if you already have something in there. If savedInstanceState is not null, you don't need to do anything:

if (savedInstanceState == null){
  // do whatever 
} else {
  // dont do anything
}

(this answer is more for people that stumble upon this question cause they can't figure out why fragments get re-added every time they turn their device)

score 4 · Answer 2 · edited Feb 18 '13 at 17:47

4

You could add: android:configChanges="screenSize|orientation" In AndroidManifest.xml.

This will prevent Android calling onCreate on screen orientation change. If you want to perform special handling of orientation change, you can override onConfigurationChanges.

edited Feb 18 '13 at 17:47

SztupY

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answered Feb 18 '13 at 17:28

Herve Thu

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Can't believe these answers are still posted here. Better have a look at this: http://cyrilmottier.com/2014/09/25/deep-dive-into-android-state-restoration/ – dumazy Apr 03 '15 at 10:02
1

One of the most significant drawbacks to this approach is that by not calling onCreate, Android won't be given a chance to load different layouts for landscape and portrait. – Bob Cram Sep 18 '19 at 13:03

score 0 · Answer 3 · answered Jan 27 '12 at 21:16

0

Save your FragmentAdapter in onSaveInstanceState and return it to the Activity after a configuration change with onRetainNonConfigurationInstance so the fragments survive an orientation change.

answered Jan 27 '12 at 21:16

SeanPONeil

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@oneilse12. Thank you. But with a FragmentActivity it is not possible to override onRetainNonConfigurationInstance method. – gutiory Jan 29 '12 at 18:38

Android - Fragment screen rotate

3 Answers3