我无法在 FragmentPagerAdapter 中重用 fragment 。使用 destroyItem() 方法,它正在删除 fragment ,但仍然没有再次调用 getItem()。只有 2-3 个图像,所以我使用 FragmentPagerAdapter 而不是FragmentStatePagerAdapter..
public class ExamplePagerAdapter extends FragmentPagerAdapter {
ArrayList < String > urls;
int size = 0;
public ExamplePagerAdapter(FragmentManager fm, ArrayList < String > res) {
super(fm);
urls = res;
size = urls.size();
}
@Override
public int getCount() {
if (urls == null) {
return 0;
} else {
return size;
}
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
FragmentManager manager = ((Fragment) object).getFragmentManager();
FragmentTransaction trans = manager.beginTransaction();
trans.remove((Fragment) object);
trans.commit();
}
@Override
public Fragment getItem(int position) {
Fragment fragment = new FloorPlanFragment();
Bundle b = new Bundle();
b.putInt("p", position);
b.putString("image", urls.get(position));
Log.i("image", "" + urls.get(position));
fragment.setArguments(b);
return fragment;
}
}
在 FragmentActivity 中,
pager.setAdapter(new ExamplePagerAdapter(getSupportFragmentManager(), res2));
最佳答案
亲吻答案:
简单使用FragmentStatePagerAdapter而不是 FragmentPagerAdapter .
我得到了答案.. 首先我想删除这个问题,因为我犯了一个非常愚蠢的错误,但是这个答案将帮助面临同样问题的人,而不是 FragmentPagerAdapter
,使用 FragmentStatePagerAdapter
.
正如评论中提到的@BlackHatSamurai:
The reason this works is because
FragmentStatePagerAdapter
destroys as Fragments that aren't being used.FragmentPagerAdapter
does not.
关于android - FragmentPagerAdapter getItem 未被调用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12581896/