I am using ViewPager2
with WebView
inside, on portrait mode it showing me single page, but when I switch to landscape mode it showing half of the current page and half of the previous page.
I have android:configChanges="orientation|screenSize"
in the manifest to avoid destroying and recreating the viewpager.
Adapter
class ViewPageAdapter(
private val tabs: ArrayList<Tab>, childFragmentManager: FragmentManager, lifecycle: Lifecycle
): FragmentStateAdapter(childFragmentManager, lifecycle) {
override fun getItemCount(): Int = tabs.size
override fun createFragment(position: Int): Fragment {
return tabs[position].fragment
}
override fun containsItem(itemId: Long): Boolean {
return tabs.map { it.tabId }.contains(itemId)
}
override fun getItemId(position: Int): Long {
return tabs[position].tabId
}
fun removeItem(index: Int) {
tabs.removeAt(index)
notifyItemRemoved(index)
notifyItemRangeChanged(index, tabs.size)
notifyDataSetChanged()
}
}
Setting up viewpager
adapter = ViewPageAdapter(browser.tabs, childFragmentManager, lifecycle)
binding.viewPager.adapter = adapter
binding.viewPager.offscreenPageLimit = 100
binding.viewPager.isUserInputEnabled = false
It seems to be a bug in ViewPager2
. https://issuetracker.google.com/issues/175796502?pli=1
I used the following workaround to fix the issue temporarily. The problem occures when I have a previous page, so what I did was switching to previous page and switch back to the current page without the smooth scrolling, I hope they will fix the bug as soon as possible.
override fun onConfigurationChanged(newConfig: Configuration) {
super.onConfigurationChanged(newConfig)
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE || newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
val c = currentPageIndex
binding.viewPager.setCurrentItem(if (currentPageIndex-1 > 0) currentPageIndex-1 else 0, false)
binding.viewPager.setCurrentItem(c, false)
}
}