How to force ViewPager to re-instantiate its items

Question

I am using ViewPager to allow user to swipe between its views  Is there a way how to force this ViewPager to reload re-instantiate its views in case that they are no longer valid or needs to be refreshed  I tried to call notifyDataSetChanged   on its adapter but this does not invoke instantiateItem   method again   EDIT  Here is the class that extends from ViewPager and its adapter definision  Bellow is the refresh   method that I call when I want to force to refresh items    public class DayFlipper extends ViewPager    public class FlipperAdapter extends PagerAdapter         Override     public int getCount             return DayFlipper DAY HISTORY              Override     public void startUpdate View container                Override     public Object instantiateItem View container  int position            Log d TAG   instantiateItem        position            Date d   DateHelper getBot            for  int i   0  i  lt  position  i                  d   DateHelper getTomorrow d                      d   DateHelper normalize d            CubbiesView cv   new CubbiesView mContext           cv setLifeDate d             ViewPager  container  addView cv  0              add map         cv setCubbieMap mMap           cv initEntries d           return cv              Override     public void destroyItem View container  int position  Object object              ViewPager  container  removeView  CubbiesView  object               Override     public void finishUpdate View container                 Override     public boolean isViewFromObject View view  Object object            return view      CubbiesView  object               Override     public Parcelable saveState             return null              Override     public void restoreState Parcelable state  ClassLoader loader                            public void refresh         getAdapter   notifyDataSetChanged

User · Accepted Answer

I have found a solution  It is just a workaround to my problem but currently the only solution    ViewPager PagerAdapter not updating the View  public int getItemPosition Object object       return POSITION NONE      Does anyone know whether this is a bug or not

User · Answer

public class DayFlipper extends ViewPager    private Flipperadapter adapter  public class FlipperAdapter extends PagerAdapter         Override     public int getCount             return DayFlipper DAY HISTORY              Override     public void startUpdate View container                Override     public Object instantiateItem View container  int position            Log d TAG   instantiateItem        position            Date d   DateHelper getBot            for  int i   0  i  lt  position  i                  d   DateHelper getTomorrow d                      d   DateHelper normalize d            CubbiesView cv   new CubbiesView mContext           cv setLifeDate d             ViewPager  container  addView cv  0              add map         cv setCubbieMap mMap           cv initEntries d   adpter   FlipperAdapter this          return cv              Override     public void destroyItem View container  int position  Object object              ViewPager  container  removeView  CubbiesView  object               Override     public void finishUpdate View container                 Override     public boolean isViewFromObject View view  Object object            return view      CubbiesView  object               Override     public Parcelable saveState             return null              Override     public void restoreState Parcelable state  ClassLoader loader                            public void refresh         adapter   notifyDataSetChanged          try this

User · Answer

Had the same problem  For me it worked to call  viewPage setAdapter  adapter      again which caused reinstantiating the pages again

[android] How to force ViewPager to re-instantiate its items

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