刷新片段ViewPager使用FragmentStatePagerAdapter [英] Refresh Fragment in ViewPager using FragmentStatePagerAdapter

问题描述

我使用的是viewPager其滑动能力两个片段之间滑动。不过，我想刷新刷卡的片段内容。该FragmentStatePagerAdapter做缓存的一​​个很好的工作，所以它很难得到片段重新加载。
我试图把一切都在onResume方法，但没有任何效果。

I am using a viewPager for its swipe abilities to swipe between two Fragments. However I want to refresh the Fragment contents on swipe. The FragmentStatePagerAdapter does a very good job of caching so its hard to get the Fragment to reload. I've tried putting everything in the onResume method but that has no effect.

我的适配器是pretty简单：

My Adapter is pretty simple:

public class AdapterHomePre extends FragmentStatePagerAdapter {

    ArrayList<Fragment> mFrags = new ArrayList<Fragment>();

    public AdapterHomePre(FragmentManager fm) {
        super(fm);

        mFrags.add(new FragmentOne());
        mFrags.add(new FragmentTwo());
    }

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

    @Override
    public Fragment getItem(int position) {
        return mFrags.get(position);
    }
}

我已经试过各种事情上堆栈溢出的建议，其中包括的建议是：

I've tried all sorts of things as suggested on stack overflow, including as suggested this:

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

这没什么区别。

我真的不希望每次都摧毁片段，但我都不能够得到该工作。

I don't really want to destroy the fragment each time, but I've not even been able to get that working.

推荐答案

我最终什么事做了编辑，设置了viewPager的片段，以便迫使孩子片段重新加载：

What I ended up doing was editing the Fragment that sets up the viewPager so it forces the child Fragment to reload:

    mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int i, float v, int i2) {
            //Not used
        }

        @Override
        public void onPageSelected(int position) {
            //Force the fragment to reload its data
            Fragment f = mAdapter.getItem(position);
            f.onResume();
        }

        @Override
        public void onPageScrollStateChanged(int i) {
            //Not used
        }
    });

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