This is a sample android app which demonstrates `RecyclerView` wrap_content inside `ScrollView` issue on Marshmallow, Nougat, Oreo and Pie (API 23, 24, 25, 26, 27 & 28) and how to work around it.
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README.md

Build Status AOSP issue link Percentage of issues still open Average time to resolve an issue

android-recycler-view-wrap-content

This is a sample android app which demonstrates RecyclerView with layout_height=wrap_content not taking height of all the items issue inside ScrollView that happens on Marshmallow, Nougat (+MR1), Orio (API 23, 24, 25, 26 & 27) and how to work around it.

  • UPDATE # 1: On Marshmallow (API 23) devices, the issue seems to happen only on PORTRAIT orientation, LANDSCAPE works fine. On Nougat (Build # NPD90G) the issue still exist on both orientation.
  • UPDATE # 2: Based on solution found on stackoverflow, replacing root ScrollView with android.support.v4.widget.NestedScrollView also avoids this issue on Marshmallow+ devices. A new demo section has been added to showcase this.
  • UPDATE # 3: Updated Support Library version from 24.1.1 to 24.2.0, but the issue still exists.
  • UPDATE # 4 (Sep 24, 2016): Updated Support Library version from 24.2.0 to 24.2.1, but the issue still exists.
  • UPDATE # 5 (Oct 30, 2016): Updated Support Library version from 24.2.0 to 25.0.0, but the issue still exists.
  • UPDATE # 6 (Dec 14, 2016): Updated Support Library version from 25.0.0 to 25.1.0, but the issue still exists.
  • UPDATE # 7 (Feb 24, 2017): Updated Support Library version from 25.1.0 to 25.2.0, but the issue still exists.
  • UPDATE # 8 (Apr 24, 2017): Updated Support Library version from 25.2.0 to 25.3.1, but the issue still exists.
  • UPDATE # 9 (Jul 14, 2017): Updated Support Library version from 25.3.1 to 25.4.0, but the issue still exists.
  • UPDATE # 10 (Oct 29, 2017): Updated Support Library version from 25.4.0 to 26.1.0, but the issue still exists.
  • UPDATE # 11 (Feb 10, 2018): Updated Support Library version from 26.1.0 to 27.0.2, but the issue still exists.
  • UPDATE # 12 (Aug 19, 2018): Updated Support Library version from 27.0.2 to 27.1.1, but the issue still exists. Tested on Nexus 5 (v6.0.1), Nexus 7 (v6.0.1), Pixel 2 XL (v9), OnePlus 5 (v8.1).

android.support.v7.widget.RecyclerView version used 27.1.1 (April 2018) - Release Notes

Devices Tested On

Device OS Version Works? Notes
Moto G (3rd Gen) 5.1.1
Nexus 5 6.0.1 Works on LANDSCAPE orientation.
Galaxy S4 (SGH-i337M) 5.0.1
Galaxy S6 (SM-G920F) 6.0.1 Works on LANDSCAPE orientation.
Nexus 6P 7.0 (NPD90G), 7.1.1 (NPF10C)
OnePlus 5 7.1.1, 8.1
Galaxy Note 3 4.2.2
Emulator 4.3.1
Emulator 8.0.0
LG G4 6.0 Works on LANDSCAPE orientation.
Pixel 2 XL 8.1, 9.0

DISCLAIMER: Most recent updates mentioned above did not execute test on all devices listed here.

Why use wrap_content?

There may be different use case where may need to use wrap_content, one example is there may be fixed number of similar menu items that needs to be rendered.

Fixed Menu Items

But, it doesnt't make sense to copy & paste code for same view multiple times. Creating views dynamically is also not that nice. So, using RecyclerView and wrap_content gives full control of creating this view.

Stack Overflow References

DISCLAIMER: This application code has been generated using activity template provided in Android Studio. It is intended to showcase the issue on specified OS versions. No effort has been made to follow industry's best practices for developing android apps. If you are interested in learning best practices for developing android apps, please follow Google's official guides found here: https://github.com/googlesamples/android-architecture

Where is the workaround?

There is nothing to see in the code. Take a look at following layout files for workaround.

Here is basic skeleton of layout I have used

<ScrollView>
  <LinearLayout> (vertical - this is the only child of scrollview)
     <SomeViews>
     <RecyclerView> (layout_height=wrap_content)
     <SomeOtherViews>

Demo

Screencast

A picture is worth a thousand words, and a video is probably worth even more ^_^

Screencast

Screenshot

screenshot

TODO

File bug report with android project.

UPDATE: Reported new issue at https://code.google.com/p/android/issues/detail?id=220204

Test On Device

For convenience, I've uploaded my debug build apk to Google Drive. You can try installing the app from https://goo.gl/TDhWtY