IssueTracker

Full stack trace of the initial failure:

08-15 21:19:59.378  2989  3302 W QueryController: AccessibilityNodeInfo returned a null child (0 of 5)
08-15 21:19:59.378  2989  3302 W QueryController: parent = android.view.accessibility.AccessibilityNodeInfo@e508; boundsInParent: Rect(0, 0 - 720, 1280); boundsInScreen: Rect(0, 0 - 720, 1280); packageName: com.android.launcher3; className: android.widget.RelativeLayout; text: null; error: null; maxTextLength: -1; stateDescription: null; contentDescription: null; tooltipText: null; viewIdResName: com.android.launcher3:id/apps_view; uniqueId: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: false; longClickable: false; contextClickable: false; enabled: true; password: false; scrollable: false; importantForAccessibility: false; visible: true; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_SHOW_ON_SCREEN - null]; isTextSelectable: false
08-15 21:19:59.378  3120  3120 E AndroidRuntime: FATAL EXCEPTION: main
08-15 21:19:59.378  3120  3120 E AndroidRuntime: Process: com.android.launcher3, PID: 3120
08-15 21:19:59.378  3120  3120 E AndroidRuntime: java.lang.NoSuchFieldError: No static field ACTION_SCROLL_IN_DIRECTION of type Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; in class Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; or its superclasses (declaration of 'android.view.accessibility.AccessibilityNodeInfo$AccessibilityAction' appears in /system/framework/framework.jar!classes3.dex)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.core.view.accessibility.AccessibilityNodeInfoCompat$AccessibilityActionCompat.<clinit>(AccessibilityNodeInfoCompat.java:748)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.recyclerview.widget.LinearLayoutManager.onInitializeAccessibilityNodeInfo(LinearLayoutManager.java:275)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.recyclerview.widget.GridLayoutManager.onInitializeAccessibilityNodeInfo(GridLayoutManager.java:173)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.recyclerview.widget.RecyclerView$LayoutManager.onInitializeAccessibilityNodeInfo(RecyclerView.java:11200)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.recyclerview.widget.RecyclerViewAccessibilityDelegate.onInitializeAccessibilityNodeInfo(RecyclerViewAccessibilityDelegate.java:81)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at androidx.core.view.AccessibilityDelegateCompat$AccessibilityDelegateAdapter.onInitializeAccessibilityNodeInfo(AccessibilityDelegateCompat.java:91)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.View.onInitializeAccessibilityNodeInfo(View.java:8752)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at com.android.launcher3.FastScrollRecyclerView.onInitializeAccessibilityNodeInfo(FastScrollRecyclerView.java:179)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.View.createAccessibilityNodeInfoInternal(View.java:8713)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.View$AccessibilityDelegate.createAccessibilityNodeInfo(View.java:30974)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.View.createAccessibilityNodeInfo(View.java:8696)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.AccessibilityInteractionController.populateAccessibilityNodeInfoForView(AccessibilityInteractionController.java:420)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.AccessibilityInteractionController.findAccessibilityNodeInfoByAccessibilityIdUiThread(AccessibilityInteractionController.java:363)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.AccessibilityInteractionController.-$$Nest$mfindAccessibilityNodeInfoByAccessibilityIdUiThread(Unknown Source:0)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.view.AccessibilityInteractionController$PrivateHandler.handleMessage(AccessibilityInteractionController.java:1647)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:106)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.os.Looper.loopOnce(Looper.java:201)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:288)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:7949)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
08-15 21:19:59.378  3120  3120 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:859)
08-15 21:19:59.379   749   762 I am_crash: [3120,0,com.android.launcher3,885767749,java.lang.NoSuchFieldError,No st

So this is specifically triggered by RV using ACTION_SCROLL_IN_DIRECTION:

        if (mRecyclerView.mAdapter != null && mRecyclerView.mAdapter.getItemCount() > 0) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                info.addAction(AccessibilityActionCompat.ACTION_SCROLL_TO_POSITION);
            }
        }

Which causes <clinit> for AccessibilityActionCompat and the resulting NSFE for ACTION_SCROLL_IN_DIRECTION.

Similar stack trace after Shailen bumped the field reference into a static inner class:

08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: FATAL EXCEPTION: main
08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: Process: com.android.launcher3, PID: 3236
08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: java.lang.NoSuchFieldError: No field ACTION_SCROLL_IN_DIRECTION of type Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; in class Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; or its superclasses (declaration of 'android.view.accessibility.AccessibilityNodeInfo$AccessibilityAction' appears in /system/framework/framework.jar!classes3.dex)
08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: 	at androidx.core.view.accessibility.AccessibilityNodeInfoCompat$Api34Impl.getActionScrollInDirection(AccessibilityNodeInfoCompat.java:5592)
08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: 	at androidx.core.view.accessibility.AccessibilityNodeInfoCompat$AccessibilityActionCompat.<clinit>(AccessibilityNodeInfoCompat.java:748)
08-16 21:48:55.339 10072  3236  3236 E AndroidRuntime: 	at androidx.recyclerview.widget.LinearLayoutManager.onInitializeAccessibilityNodeInfo(LinearLayoutManager.java:275)

Which, looking at the decompiled bytecode, seems like a violation of https://docs.oracle.com/javase/specs/jls/se7/html/jls-15.html#jls-15.25:

    @NonNull
    @OptIn(markerClass = {BuildCompat.PrereleaseSdkCheck.class})
    public static final AccessibilityActionCompat ACTION_SCROLL_IN_DIRECTION = new AccessibilityActionCompat(     
        (Build.VERSION.SDK_INT >= 34) ? AccessibilityNodeInfoCompat.Api34Impl.getActionScrollInDirection() : null, 16908382, null, null, null);

At run time, the first operand expression of the conditional expression is evaluated first. If necessary, unboxing conversion is performed on the result.

The resulting boolean value is then used to choose either the second or the third operand expression:

If the value of the first operand is true, then the second operand expression is chosen.

If the value of the first operand is false, then the third operand expression is chosen.

The chosen operand expression is then evaluated and the resulting value is converted to the type of the conditional expression as determined by the rules stated above.

This conversion may include boxing (§5.1.7) or unboxing (§5.1.8) conversion.

The operand expression not chosen is not evaluated for that particular evaluation of the conditional expression.

Unless SDK_INT is >= 34 -- and as far as I can tell it cannot be -- then we should never see that stack trace.

What the heck? I moved this to a static init block to avoid the ternary expression, and I added logging in getActionScrollInDirection() to validate the SDK_INT, and we're still getting:

08-17 15:35:38.683  3203  3203 D AccessibilityNodeInfoCompat: Executing getActionScrollInDirection() on SDK_INT 33
...
08-17 15:35:38.684  3203  3203 E AndroidRuntime: FATAL EXCEPTION: main
08-17 15:35:38.684  3203  3203 E AndroidRuntime: Process: com.android.launcher3, PID: 3203
08-17 15:35:38.684  3203  3203 E AndroidRuntime: java.lang.NoSuchFieldError: No field ACTION_SCROLL_IN_DIRECTION of type Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; in class Landroid/view/accessibility/AccessibilityNodeInfo$AccessibilityAction; or its superclasses (declaration of 'android.view.accessibility.AccessibilityNodeInfo$AccessibilityAction' appears in /system/framework/framework.jar!classes3.dex)
08-17 15:35:38.684  3203  3203 E AndroidRuntime: 	at androidx.core.view.accessibility.AccessibilityNodeInfoCompat$Api34Impl.getActionScrollInDirection(AccessibilityNodeInfoCompat.java:5601)
08-17 15:35:38.684  3203  3203 E AndroidRuntime: 	at androidx.core.view.accessibility.AccessibilityNodeInfoCompat$AccessibilityActionCompat.<clinit>(AccessibilityNodeInfoCompat.java:750)

        public static final AccessibilityActionCompat ACTION_SCROLL_IN_DIRECTION;

        static {
            final Object action;
            if (Build.VERSION.SDK_INT >= 34) {
                action = Api34Impl.getActionScrollInDirection();
            } else {
                action = null;
            }
            ACTION_SCROLL_IN_DIRECTION = new AccessibilityActionCompat(
                    action, android.R.id.accessibilityActionScrollInDirection, null, null, null);
        }

Fixed in the platform, you should be okay to restore the code as it was originally.

The following release(s) address this bug.It is possible this bug has only been partially addressed:

• androidx.core:core:1.13.0-alpha01