Flickering of fragments when using ObservableScrollView or ObservableListView

[jaredrummler]

This is an issue in Android-ObservableScrollView. See: ksoichiro/Android-ObservableScrollView#117

To fix it you could add the following code in registerScrollView and registerListView in MaterialViewPagerAnimator.

public void registerScrollView(final ObservableScrollView scrollView,
        final ObservableScrollViewCallbacks observableScrollViewCallbacks) {
    if (scrollView != null) {
        scrollViewList.add(scrollView); // add to the scrollable list
        // fix flickering
        scrollView.setTouchInterceptionViewGroup((ViewGroup) scrollView.getParent().getParent());
        ...

public void registerListView(final ObservableListView listView,
        final ObservableScrollViewCallbacks observableScrollViewCallbacks) {
    if (listView != null) {
        scrollViewList.add(listView); // add to the scrollable list
        listView.setTouchInterceptionViewGroup((ViewGroup) listView.getParent().getParent());
        ...

This will use the RelativeLayout in material_view_pager_layout.xml as the ViewGroup. Inspired by this workaround: ksoichiro/Android-ObservableScrollView@f17e3ce

[florent37]

can you do create a pull request with this code please ?

[nurzhannogerbek]

@florent37 Check this. Its the same as here Click here

[florent37]

thanks for your help 👍 I really appreciate it 😄
I sent it to the 1.0.3.3

[Anearion]

Is this fixed somehow ? I'm experiencing this right now. My third tab is an observableScrollView and if I touch the content this fragment flick to my second tab tab, which is a recyclerview.

EDIT:

just updated to 1.1, problem still here tho

[egor-n]

For anyone still encountering this issue, your registerScrollView should happen after the view has been attached to the window.

There is a condition for the ScrollView's parent to be not null, which can be false in onCreateView, for example.

[youtoou2]

@Anearion thanks to @egor-n , just register your scrollview after onStart() to make sure the view is attached. I'm having the same issue and registering it in onCreateView() , finally it is working fine.