android - How to refer to data in a previous viewpager -

android - How to refer to data in a previous viewpager -

i have android project using fragments , viewpager. using separate countdown timer every page, runs when view of page 'onscreen'. @ first time every page same, after while page 1 might 20 seconds left, page 2 60 seconds , on.

my problem don't know how save remaining time, moment user swipes next page. using onpagestatelistener has next code, saving new value of questionid , old value of new time. how refer value of questionid , matching newtime-value of page in view before user swiped?

viewpager.setonpagechangelistener(new viewpager.onpagechangelistener() { public void onpagescrollstatechanged(int state) { if (state == viewpager.scroll_state_dragging) { savetime(); } } public void onpagescrolled(int position, float arg1, int arg2) {} public void onpageselected(int pos) { questionid = mquestions.get(pos).getnr() runtime(); } }); public void savetime(){ mquestions.get(questionid).settime(newtime); } public void runtime(){ if (mtimer != null) { mtimer.cancel(); mtimer = null; } mtimer = new countdowntimer(90000, 1000) {//millisinfuture, countdowninterval public void ontick(long millisuntilfinished) { newtime = (millisuntilfinished/1000); } public void onfinish() { } }.start(); }

first of can utilize sharedpreferences.

besides, of course of study can save info in adapter utilize viewpager, can save info in db or create singleinstance in parent activity or fragment.

android android-fragments android-viewpager