我为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]
}
在Activity中,我有以下方法来设置视图寻呼机。
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
}
当新的数据集进来时,我再次调用上面的方法并再次更改适配器,但我已经实例化的视图没有更新。只有未实例化的视图才会更新。
我甚至尝试notifyDataSetChange()
将以下代码添加到适配器,但这也无法正常工作。
override fun getItemPosition(`object`: Any?): Int = FragmentPagerAdapter.POSITION_NONE
答案 0 :(得分:1)
如果您想更新视图,可以尝试直接致电adapter.notifyDataSetChanged()
。
也许您需要在插入新数据之前清除mFragmentList
和mFragmentTitleList
?