IssueTracker

Any suggestions on where such an interface might live? I don't think it makes sense for the interface to be in the drawerlayout artifact if you're specifically going to use the interface to *not* use DrawerLayout.

androidx.customview would be a good candidate. This is used by all of the widget libraries.

Project: platform/frameworks/support
Branch: androidx-master-dev

commit 3ed3fb003fa6c1244f923202859a616225b5b2fa
Author: Ian Lake <ilake@google.com>
Date:   Fri Feb 14 11:17:46 2020

    Create an interface for layouts that can be opened
   
    Create a common interface that represents layouts
    that have two states: open and closed. This allows
    higher level libraries to rely on the interface,
    rather than concrete implementations such as
    DrawerLayout, making them more resilient to
    changes in the current recommended implementation.
   
    Fixes: 129979320
    Test: ./gradlew checkApi
    Change-Id: I0f2a1414977825aa053c6555261f2b7d4417bd19

M       customview/customview/api/1.1.0-alpha02.txt
M       customview/customview/api/current.txt
M       customview/customview/api/public_plus_experimental_1.1.0-alpha02.txt
M       customview/customview/api/public_plus_experimental_current.txt
M       customview/customview/api/restricted_1.1.0-alpha02.txt
M       customview/customview/api/restricted_current.txt
A       customview/customview/src/main/java/androidx/customview/widget/Openable.java
M       drawerlayout/drawerlayout/api/1.1.0-alpha03.txt
M       drawerlayout/drawerlayout/api/current.txt
M       drawerlayout/drawerlayout/api/public_plus_experimental_1.1.0-alpha03.txt
M       drawerlayout/drawerlayout/api/public_plus_experimental_current.txt
M       drawerlayout/drawerlayout/api/restricted_1.1.0-alpha03.txt
M       drawerlayout/drawerlayout/api/restricted_current.txt
M       drawerlayout/drawerlayout/build.gradle
M       drawerlayout/drawerlayout/src/main/java/androidx/drawerlayout/widget/DrawerLayout.java
M       jetifier/jetifier/migration.config
M       slidingpanelayout/slidingpanelayout/api/1.1.0-alpha01.txt
M       slidingpanelayout/slidingpanelayout/api/current.txt
M       slidingpanelayout/slidingpanelayout/api/public_plus_experimental_1.1.0-alpha01.txt
M       slidingpanelayout/slidingpanelayout/api/public_plus_experimental_current.txt
M       slidingpanelayout/slidingpanelayout/api/restricted_1.1.0-alpha01.txt
M       slidingpanelayout/slidingpanelayout/api/restricted_current.txt
M       slidingpanelayout/slidingpanelayout/src/main/java/androidx/slidingpanelayout/widget/SlidingPaneLayout.java

https://android-review.googlesource.com/940787