IssueTracker

Seems that this issue will never be fixed as google has marked the multiple duplicates as `wont fix`.

https://android-review.googlesource.com/c/platform/frameworks/support/+/1295992 is under review.

Adding the following block in Support4Demos.onCreate:

        ViewCompat.addOnUnhandledKeyEventListener(getListView(),
                new ViewCompat.OnUnhandledKeyEventListenerCompat() {
                    @Override
                    public boolean onUnhandledKeyEvent(View v, KeyEvent event) {
                        return false;
                    }
                });

produces:

04-28 17:40:41.523 4608-4608/com.example.android.supportv4 I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
04-28 17:40:41.524 4608-4608/com.example.android.supportv4 I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>

on a Nexus 6 API 23 emulator before the CL, and no such message with the CL

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

commit 6ef009775ee7b4b179cafa28467d3fea6bfbef49
Author: Kirill Grouchnikov <kirillg@google.com>
Date:   Tue Apr 28 12:04:52 2020

    Extract v28+ calls into a separate static class
   
    So that the new View.OnUnhandledKeyEventListener class
    doesn't get loaded on older platform versions.
   
    Bug: 153695093
    Test: ./gradlew appcompat:appcompat:connectedCheck --info --daemon -Pandroid.testInstrumentationRunnerArguments.class=androidx.appcompat.app.KeyEventsTestCaseWithWindowDecor
    Change-Id: Id34194f77b9c7a2f0864e38d17ef6039733dee95

M       core/core/src/main/java/androidx/core/view/ViewCompat.java

https://android-review.googlesource.com/1295992

This will be in core:1.4.0-alpha01

@5 Seems indeed fixed. Thank you!