Seamless nested scrolling (Android)

Question

We\'ve all been advised against nesting views that contain a scrolling mechanism. However, in the latest Android release (5.0), the Phone app caught my attention with what s

Answer 1

I have been wanting to achieve the same effect as well. I came up finding a relevant library called ObservableScrollView in GitHub and it requires more work on the back-end via a TouchInterceptFramework but at least it did the job even for pre-lollipop devices. It also supports not only child scrollviews and listviews but also recyclerviews. Here's the link:

https://github.com/ksoichiro/Android-ObservableScrollView

I hope they consider nested scrolling for both lollipop and pre-lollipop devices as a part of their design standard soon. This is a good sign.

Answer 2

You can use the following combination of attributes on your ListView to achieve this:

<ImageView ... /> <!-- must be before ListView -->

<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="..." <!-- height of imageView -->
    android:clipToPadding="false"
    ...
/>

You don't have to manage any scrolling in your code at all, and it requires no header/dummy views in your list adapter.