标签+ ViewPager + FragmentStatePagerAdapter - 如何删除片段？ [英] Tabs + ViewPager + FragmentStatePagerAdapter - How to remove fragment?

问题描述

我使用选项卡+刷卡的项目，我有困难的时候删除片段。

I'm using the "Tabs + Swipe" project and I'm having a difficult time removing a fragment.

步骤我做的：

1. 从数据库中删除标签
2. 从FragmentStatePagerAdapter数据源中删除标签
3. 从动作条中删除选项卡。
4. 在使用支持FragmentManager删除片段。

的问题： 之后我进行了删除，出于某种原因，我仍然可以滚动到右侧，看到一个空的片段。我无法选择它，它只是反弹。 好像没有被删除的片段，而是从左边改变其位置标记。

The problem: After I perform the remove, for some reason, I can still scroll to the right and see an empty fragment. I can't select it, it just bounces back. It seems like the fragment is not being removed but rather changes its position to the tag from the left.

我的适配器：

public class SectionsPagerAdapter extends FragmentStatePagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            Fragment fragment = new TabFragment();

            Bundle args = new Bundle();
            args.putInt(TabFragment.ARG_TAB_POSITION, position);
            fragment.setArguments(args);

            return fragment;
        }

        @Override
        public int getCount() {
            return tabsList.size();
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return tabsList.get(position).getTitle();
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            super.destroyItem(container, position, object);
            FragmentManager manager = ((Fragment)object).getFragmentManager();
            android.support.v4.app.FragmentTransaction trans = manager.beginTransaction();
            trans.remove((Fragment)object);
            trans.commit();
        }
    }

我remove方法（片段中调用的）：

public void removeTab() {
            mTabTableHandler.deleteTab(tab.getId()); //db
            tabsList.remove(tabPosition); //data source
            actionBar.removeTabAt(tabPosition); // actionbar

            getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit(); // support fragmentmanager

            tabsList = mTabTableHandler.query(); //requery db
            mSectionsPagerAdapter.notifyDataSetChanged(); //notify adapter
        }

鸭preciate的帮助！

Appreciate the help!

推荐答案

您可以在这里找到答案 - <一href="http://stackoverflow.com/questions/10396321/remove-fragment-page-from-viewpager-in-android">Remove信息段从ViewPager在Android的

you can find the answer here - Remove Fragment Page from ViewPager in Android

好像缺少什么在你的code为覆盖以下适配器的方法：

it seems what missing in your code is overwriting of the following adapter's method:

@Override
public int getItemPosition(Object object){
    return PagerAdapter.POSITION_NONE;
}

解释为什么这样怪异的解决方案的工作，你可以在回答中我只要你的链接的问题找到。

explanation why such "weird" solution works you can find in the answer to the question in the link I provided you.

这篇关于标签+ ViewPager + FragmentStatePagerAdapter - 如何删除片段？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！