FixedFragmentStatePagerAdapter.java

package android.support.v4.app;

import android.os.Bundle;
import android.view.ViewGroup;

/**
 * Fix for rare bug involving Fragment state.
 *
 * https://code.google.com/p/android/issues/detail?id=37484#c1
 */
public abstract class FixedFragmentStatePagerAdapter extends FragmentStatePagerAdapter {
   public FixedFragmentStatePagerAdapter(FragmentManager fm) {
      super(fm);
   }

   @Override
   public Object instantiateItem(ViewGroup container, int position) {
      Fragment fragment = (Fragment)super.instantiateItem(container, position);
      Bundle savedFragmentState = fragment.mSavedFragmentState;
      if (savedFragmentState != null) {
         savedFragmentState.setClassLoader(fragment.getClass().getClassLoader());
      }
      return fragment;
   }
}