void function ( View arg0 , int arg1 , Object arg2 ) { }
called to inform the adapter of which item is currently considered to be the `` primary '' , that is the one show to the user as the current page . concode_field_sep int POSITION_NONE concode_elem_sep int POSITION_UNCHANGED concode_elem_sep DataSetObservable mObservable concode_field_sep void restoreState concode_elem_sep void startUpdate concode_elem_sep void startUpdate concode_elem_sep Parcelable saveState concode_elem_sep Object instantiateItem concode_elem_sep Object instantiateItem concode_elem_sep float getPageWidth concode_elem_sep int getItemPosition concode_elem_sep void registerDataSetObserver concode_elem_sep CharSequence getPageTitle concode_elem_sep void notifyDataSetChanged concode_elem_sep void finishUpdate concode_elem_sep void finishUpdate concode_elem_sep void unregisterDataSetObserver concode_elem_sep int getCount concode_elem_sep void destroyItem concode_elem_sep void destroyItem concode_elem_sep boolean isViewFromObject