FragmentStatePagerAdapter在重新选择选项卡时不调用getItem

Question

我有一个复杂的UI设置，如下所示：

public class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{       
    TrendsLV[] arrayOfTrendsFragments;

    public ScreenSlidePagerAdapter(FragmentManager fragmentManager)
    {

        super(fragmentManager);

        arrayOfTrendsFragments = new TrendsLV[NUM_PAGES];
        arrayOfTrendsFragments[0] = new TrendsLV(arrayOfMonths, 0);
        arrayOfTrendsFragments[1] = new TrendsLV(arrayOfMonths, 1);
        arrayOfTrendsFragments[2] = new TrendsLV(arrayOfMonths, 2);
    }

    @Override
    public Fragment getItem(int position) 
    {                       
        return arrayOfTrendsFragments[position];
    }

    @Override
    public int getCount() 
    {
        return NUM_PAGES;
    }   
}

public class TrendsPagerHolder extends Fragment implements ResultsListener
{
private void displayData()
{
    if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
    {   
        if (pagerAdapter == null)
            pagerAdapter = new ScreenSlidePagerAdapter(getFragmentManager());

        pager.setAdapter(pagerAdapter);
        pager.setCurrentItem(0);
    }
}
}

谢谢你。

Answer 1

我非常肯定在getItemPosition（Object Object）中返回POSITION_NONE将解决您的问题：

public int getItemPosition(Object object){
    return POSITION_NONE;
}

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