android-viewpager2

来源： https://stackoverflow.com/questions/60313270/how-to-fix-scrolling-issue-of-horizontal-viewpager2-and-recyclerview-that-are-in

来源： https://stackoverflow.com/questions/60151275/android-viewpager2-with-fragment-containing-a-recyclerview-not-scrolling

来源： https://stackoverflow.com/questions/60151275/android-viewpager2-with-fragment-containing-a-recyclerview-not-scrolling

来源： https://stackoverflow.com/questions/58492796/viewpager2-with-differing-item-heights-and-wrap-content

来源： https://stackoverflow.com/questions/58492796/viewpager2-with-differing-item-heights-and-wrap-content

问题 I implemented the new ViewPager for my project. The viewPager2 contains a list of fragment private class ViewPagerAdapter extends FragmentStateAdapter { private ArrayList<Integer> classifiedIds; ViewPagerAdapter(@NonNull Fragment fragment, final ArrayList<Integer> classifiedIds) { super(fragment); this.classifiedIds = classifiedIds; } @NonNull @Override public Fragment createFragment(int position) { return DetailsFragment.newInstance(classifiedIds.get(position)); } @Override public int

问题 i have an activity with bottom navigation view with 3 Fragments associated. One of them is a Fragment with a ViewPager2 that uses a FragmentStateAdapter. Inside the createfragment(int position) method of the Adapter I return a couple Instances of another Fragment which has an Options Menu and inside it's onCreate() i call setHasOptionsMenu(true). The Problem is that on initialization of the adapter, the menu from all fragments are visible not just the menu of the currently visible fragment.

问题 I have 3 fragments used in bottom navigation in Main Activity. In one of the fragments, I have screenslidepagefragment in viewpager2 which has 3 buttons. When I click on any of these 3 buttons I have this error E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.headlines, PID: 3209 java.lang.NullPointerException: Attempt to invoke virtual method 'androidx.lifecycle.LiveData com.example.headlines.Model.NewsViewModel.getData(java.lang.String)' on a null object reference at com.example

问题 I am using ViewPager2 with FragmentStateAdapter and i am calling notifyItemChanged(position). But as expected createFragment method not calling again. Is it is the intended behavior or bug, what should I do My Code is class EEditionPagerAdapter( fragmentManager: FragmentManager, lifecycle: Lifecycle, private var date: String ) : FragmentStateAdapter(fragmentManager, lifecycle) { private var menuList = emptyList<EEditionMenu>() override fun getItemCount(): Int = menuList.size override fun

问题 I got troubles and I thinks its CoordinatorLayout's fault but not sure. I'm using ViewPager2 inside a ConstraintLayout and I use the CoordinatorLayout like BottomSheet. But when I drag to hide it not works good. I replaced the ViewPager2 by ViewPager and it works well. I hope you can help me. This is my XML file. <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http: