Is it possible to touch the ViewPager inside CollapsingToolbarLayout and scroll it?

[ssung99]

I want to touch ViewPager inside CollapsingToolbarLayout, vertical scroll
Please help me

It is my .xml file

<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">

<me.henrytao.smoothappbarlayout.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">
  ...
</me.henrytao.smoothappbarlayout.widget.NestedScrollView>

<me.henrytao.smoothappbarlayout.SmoothAppBarLayout
    android:layout_width="match_parent"
    android:layout_height="400dp">
    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:layout_collapseParallaxMultiplier="0.7"
        app:contentScrim="@color/white">
        <ViewPager
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.7"/>
    </android.support.design.widget.CollapsingToolbarLayout>
</me.henrytao.smoothappbarlayout.SmoothAppBarLayout>

...

</android.support.design.widget.CoordinatorLayout>

[henrytao-me]

Hi @ssung99

Unfortunately, it's not possible right now. People is counting on this issue but I haven't found the solution yet. Sorry.

Cheers,
Henry

[ssung99]

I understood.
Thank you for answering @henrytao-me

[KevinLeigh]

It is possible to have a view pager in collapsing toolbar layout with both collapsing toolbar layout and view pager scrolling functionality to work properly, below I have the following view hierarchy:

 <CoordinatorLayout>
      <AppBarLayout>
          <CollapsingToolbarLayout>
               <FrameLayout>
                    <ViewPager id="@+id/viewPager"/>
                    <View id="@+id/interceptView"/>
                </FrameLayout>
          </CollapsingToolbarLayout>
     </AppBarLayout>
</CoordinatorLayout>

And then the code is:

View viewPager = findViewById(R.id.viewPager);
findViewById(R.id.interceptView).setOnTouchListener((v, event) -> {
    viewPager.onTouchEvent(event);
    return true;
});