Need help to report bag . Crash in Qt 6.11.1 accessibility problem.

MishelFF

Android 10 crash in Qt 6.11.1 accessibility: NoSuchMethodError for AccessibilityNodeInfo.RangeInfo constructor

Application crashes on Android 10 when Android Accessibility service is enabled.

The crash happens inside Qt Android accessibility implementation.

Environment:

Qt version: 6.11.1
Build: MSVC 2022 x86_64 host
Android target: arm64-v8a
Device: Xiaomi Redmi Note 8T
Android version: 10 (API 29)
NDK: 27.2.12479018

The application works normally when Accessibility is disabled on the device.
When Accessibility is enabled, the application crashes during accessibility node population.

Crash log:
Fatal signal 6 (SIGABRT)

Abort message:
JNI DETECTED ERROR IN APPLICATION:
JNI CallVoidMethodV called with pending exception

java.lang.NoSuchMethodError:
no non-static method
"Landroid/view/accessibility/AccessibilityNodeInfo$RangeInfo;.<init>(IFFF)V"

Nils Sjoberg

בדקו בקוד המקור של בדוק את קוד המקור של Qt (במודול הנגישות של אנדרואיד) כדי לראות היכן נוצר ה-RangeInfo.

MishelFF

Suspected cause
The problem appears to be caused by this code in Qt Android accessibility:

QJniObject rangeInfo(
"android/view/accessibility/AccessibilityNodeInfo$RangeInfo",
"(IFFF)V",
rangeType, min, max, current);

The constructor signature "(IFFF)V" is not available on Android 10 runtime.

The call creates a pending JNI exception:
java.lang.NoSuchMethodError

but the exception is not cleared before continuing, which results in SIGABRT.

Proposed fix
The RangeInfo constructor usage should be protected by Android API level check.

For example:

if (QtAndroidPrivate::androidSdkVersion() >= 36) {
QJniObject rangeInfo(
"android/view/accessibility/AccessibilityNodeInfo$RangeInfo",
"(IFFF)V",
rangeType, min, max, current);

if (rangeInfo.isValid())
    env->CallVoidMethod(node, m_setRangeInfoMethodID,
                        rangeInfo.object());

}

or alternatively Qt should use the correct API availability check for RangeInfo constructor.