the workaround i found is to put the call to mViewPager.setCurrentItem(0)
in the onPageSelected
in a way like this:
if(isOrientationChanged){
mViewPager.setCurrentItem(0, false);
Log.d(TAG, "onPageSelectedGoto: "+ mViewPager.getCurrentItem());
position = 0;
}
Il giorno lunedì 22 ottobre 2012 17:13:03 UTC+2, Francesco Noya ha scritto:
>
> I've got a ViewPager that should change the page displayed upon
> orientation change.
>
> What I would like to achieve is to restart from the first fragment when i
> switch from landscape to portrait or vice-versa.
>
> I supposed was just necessary to set a mViewPager.setCurrentItem(0,
> false); in the onCreate statement but it doesn't seems to work: It seems
> that the last position displayed is in someway cached and automatically
> restored by the system.
>
> I've logged all the steps involved by the adapter and by
> the SimpleOnPageChangeListener and I really don't understand what could be
> wrong...
>
> //Turning to the third page in Portrait Mode
> 10-22 16:51:25.781: D/ViewerActivity(11381): onPageSelected - position 2
> 10-22 16:51:26.039: D/ViewerActivity(11381): destroy 0
> 10-22 16:51:26.039: D/ViewerActivity(11381): instatiate 3
> 10-22 16:51:26.039: D/ViewerActivity(11381): getItem 3
>
> //Switched to Landscape: call mViewPager.setCurrentItem(0); in the
> onCreate method
> 10-22 16:51:30.734: D/ViewerActivity(11381): current Item: 0
>
> //Adapter calls restore state
> 10-22 16:51:30.761: D/ViewerActivity(11381): restoreState
>
> That's what is not clear to me: a call to
> the SimpleOnPageChangeListener.onPageSelected is issued with the same value
> as the last page shown before the orientation change
>
> *10-22 16:51:30.761: D/ViewerActivity(11381): onPageSelected - position 2*
> *
> *
> //the adapter Instantiate the current and the adjacents pages
> 10-22 16:51:30.801: D/ViewerActivity(11381): instatiate 2
> 10-22 16:51:30.801: D/ViewerActivity(11381): getItem 2
> 10-22 16:51:30.801: D/ViewerActivity(11381): instatiate 1
> 10-22 16:51:30.801: D/ViewerActivity(11381): getItem 1
> 10-22 16:51:30.804: D/ViewerActivity(11381): instatiate 3
> 10-22 16:51:30.804: D/ViewerActivity(11381): getItem 3
>
> Anyone has suggestions?
>
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