Android Can'；t更新FragmentPagerAdapter中的片段

我已经为

FragmentPagerAdapter

编写了以下代码来设置ViewPager。

class ViewPagerAdapter(manager: FragmentManager) : FragmentPagerAdapter(manager) {

    private val mFragmentList = ArrayList<Fragment>()
    private val mFragmentTitleList = ArrayList<String>()

    override fun getItem(position: Int): Fragment = mFragmentList[position]

    override fun getCount(): Int = mFragmentList.size

    fun addFragment(fragment: Fragment, title: String) {
        mFragmentList.add(fragment)
        mFragmentTitleList.add(title)
    }

    fun addFragment(fragment: Fragment) {
        mFragmentList.add(fragment)
    }

    override fun getPageTitle(position: Int): CharSequence = mFragmentTitleList[position]

}

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当您想要更新视图时，可以尝试直接调用

适配器.notifyDataSetChanged（）

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在插入新数据之前，您可能需要清除

MFFragmentList

和

MFFragmentTitleList

。

您可以进行回调，然后在收到新数据时以片段形式更新列表。您解决了此问题吗？

private fun setupViewPager(viewPager: ViewPager, dataList: List<CholesterolMonthlySummary>) {
    Log.i(TAG, "Size of the dataList passing through setupViewPager is ${dataList.size}")

    val adapter = ViewPagerAdapter(supportFragmentManager)
    adapter.addFragment(CholesterolPagingFragment.newInstance(ArrayList(dataList), CHOL))
    adapter.addFragment(CholesterolPagingFragment.newInstance(ArrayList(dataList), LDL))
    adapter.addFragment(CholesterolPagingFragment.newInstance(ArrayList(dataList), HDL))
    adapter.addFragment(CholesterolPagingFragment.newInstance(ArrayList(dataList), TRIG))
    viewPager.adapter = adapter

}

override fun getItemPosition(`object`: Any?): Int = FragmentPagerAdapter.POSITION_NONE