···1318131813191319 @Override
13201320 public int getItemPosition(Object o) {
13211321- if (o == mPager.getChildAt(0)) return PagerAdapter.POSITION_UNCHANGED;
13221322- if (o == mPager.getChildAt(1)) return PagerAdapter.POSITION_UNCHANGED;
13211321+ if (mPager != null) {
13221322+ if (o == mPager.getChildAt(0)) return PagerAdapter.POSITION_UNCHANGED;
13231323+ if (o == mPager.getChildAt(1)) return PagerAdapter.POSITION_UNCHANGED;
13241324+ }
1323132513241326 int pos = sessions == null ? -1 : sessions.indexOf(o);
13251327 if (pos < 0) return PagerAdapter.POSITION_NONE;