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  4. My Android app crashes upon startup with Qt 6.9.2.
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My Android app crashes upon startup with Qt 6.9.2.

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  • J Offline
    J Offline
    jarle
    wrote last edited by
    #1

    The app works with 6.9.1. It overrides the Java class QtActivity to perform some initialization and add functionality. The package name is configurable at compile time (I want to be able to install both release and debug builds on the same device).

    The problem seems to occur immediately after I call app.exec(); in main.cpp.

    Unfortunately, as far as I know, there are no debug options in QJniObject to enable trace logging of what it actually does, so I have no idea which Java class or function is missing.

    Do you know of any changes in 6.9.2 that could cause this? Or any way to troubleshoot it (short of patching QJniObject with trace logging and building Qt for Android from source)?

    F/ng.nextappdevel: runtime.cc:716] JNI DETECTED ERROR IN APPLICATION: GetMethodID received NULL jclass
F/ng.nextappdevel: runtime.cc:716]     in call to GetMethodID
F/ng.nextappdevel: runtime.cc:716]     from void org.qtproject.qt.android.QtNative.startQtApplication()
F/libc    : Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 5929 (qtMainLoopThrea), pid 5892 (ng.nextappdevel)
F/DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
F/DEBUG   : Build fingerprint: 'Nokia/TheThing_00EEA/TTG_sprout:14/UKQ1.231003.002/00WW_4_20E:user/release-keys'
F/DEBUG   : Revision: '0'
F/DEBUG   : ABI: 'arm64'
F/DEBUG   : Timestamp: 2025-09-19 17:35:54.211351096+0300
F/DEBUG   : Process uptime: 3s
F/DEBUG   : Cmdline: eu.lastviking.nextappdevel
F/DEBUG   : pid: 5892, tid: 5929, name: qtMainLoopThrea  >>> eu.lastviking.nextappdevel <<<
F/DEBUG   : uid: 10321
F/DEBUG   : signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
F/DEBUG   : Abort message: 'JNI DETECTED ERROR IN APPLICATION: GetMethodID received NULL jclass
F/DEBUG   :     in call to GetMethodID
F/DEBUG   :     from void org.qtproject.qt.android.QtNative.startQtApplication()'
F/DEBUG   :     x0  0000000000000000  x1  0000000000001729  x2  0000000000000006  x3  0000006ddce6edd0
F/DEBUG   :     x4  5151441f43445342  x5  5151441f43445342  x6  5151441f43445342  x7  7f7f7f7f7f7f7f7f
F/DEBUG   :     x8  00000000000000f0  x9  00000070d9a521b8  x10 0000000000000001  x11 00000070d9a9a924
F/DEBUG   :     x12 0000000000004a6c  x13 00000000000000d4  x14 0000006ddce6dbc0  x15 0000000034155555
F/DEBUG   :     x16 00000070d9b02d18  x17 00000070d9ade3b0  x18 0000006d6bb58000  x19 0000000000001704
F/DEBUG   :     x20 0000000000001729  x21 00000000ffffffff  x22 0000000000000002  x23 0000006ddce75000
F/DEBUG   :     x24 00000000000000af  x25 0000006ddce75000  x26 0000000000000001  x27 0000000000000000
F/DEBUG   :     x28 0000006de0dbf2b4  x29 0000006ddce6ee50
F/DEBUG   :     lr  00000070d9a8b624  sp  0000006ddce6edb0  pc  00000070d9a8b650  pst 0000000000001000
F/DEBUG   : 45 total frames
F/DEBUG   : backtrace:
F/DEBUG   :       #00 pc 000000000005b650  /apex/com.android.runtime/lib64/bionic/libc.so (abort+168) (BuildId: 50118287324a156bc7be11d3d940c7be)
F/DEBUG   :       #01 pc 000000000093091c  /apex/com.android.art/lib64/libart.so (art::Runtime::Abort(char const*)+344) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #02 pc 00000000000160fc  /apex/com.android.art/lib64/libbase.so (android::base::SetAborter(std::__1::function<void (char const*)>&&)::$_0::__invoke(char const*)+80) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
F/DEBUG   :       #03 pc 00000000000156d0  /apex/com.android.art/lib64/libbase.so (android::base::LogMessage::~LogMessage()+516) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
F/DEBUG   :       #04 pc 0000000000442390  /apex/com.android.art/lib64/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+1696) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #05 pc 000000000088ba68  /apex/com.android.art/lib64/libart.so (art::JavaVMExt::JniAbortV(char const*, char const*, std::__va_list)+108) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #06 pc 0000000000589c40  /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::AbortF(char const*, ...) (.__uniq.99033978352804627313491551960229047428)+140) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #07 pc 000000000058a040  /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckInstance(art::ScopedObjectAccess&, art::(anonymous namespace)::ScopedCheck::InstanceKind, _jobject*, bool) (.__uniq.99033978352804627313491551960229047428)+984) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #08 pc 0000000000583d80  /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::Check(art::ScopedObjectAccess&, bool, char const*, art::(anonymous namespace)::JniValueType*) (.__uniq.99033978352804627313491551960229047428)+2012) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #09 pc 000000000057efe0  /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::GetMethodIDInternal(char const*, _JNIEnv*, _jclass*, char const*, char const*, bool) (.__uniq.99033978352804627313491551960229047428)+212) (BuildId: c35c9ebf7bb06435e4b31977d87bd5d5)
F/DEBUG   :       #10 pc 00000000004e8c8c  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QJniObject::getMethodID(_JNIEnv*, _jclass*, char const*, char const*, bool)+40) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #11 pc 00000000004e9a98  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QJniObject::callObjectMethod(char const*, char const*, ...) const+68) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #12 pc 0000000000081670  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk (offset 0x7544000) (BuildId: 5b164bf6a1273bdf0d0587ce10f278fb151ab042)
F/DEBUG   :       #13 pc 0000000000085600  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk (offset 0x7544000) (BuildId: 5b164bf6a1273bdf0d0587ce10f278fb151ab042)
F/DEBUG   :       #14 pc 00000000000865a0  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk (offset 0x7544000) (BuildId: 5b164bf6a1273bdf0d0587ce10f278fb151ab042)
F/DEBUG   :       #15 pc 000000000039fcdc  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QObject::event(QEvent*)+524) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #16 pc 000000000036ac30  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QCoreApplication::notifyInternal2(QObject*, QEvent*)+160) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #17 pc 000000000036b930  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)+432) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #18 pc 00000000004807b0  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Core_arm64-v8a.so (offset 0x608000) (QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+76) (BuildId: ab1cc606193d16041cb93976f190d199fb8eae0b)
F/DEBUG   :       #19 pc 0000000000649b74  /data/app/~~fbO1rzPPetOl2UP36WivKg==/eu.lastviking.nextappdevel-gaI0o9JZ_f1lnQGNCJSwhg==/base.apk!libQt6Gui_arm64-v8a.so (offset 0xe70000) (QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+20) (BuildId: 55e85fc8ab0b8efcf13d9cccfd017afdd66517
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