Mobile and Embedded

@kd_wala Thanks. I solved the problem: void TestClass::toast_message(const QString& text, Duration duration) { QtAndroid::runOnAndroidThread([&] { QAndroidJniObject _text = QAndroidJniObject::fromString(text); QAndroidJniObject toast = QAndroidJniObject::callStaticObjectMethod( "android/widget/Toast", "makeText", "(Landroid/content/Context;Ljava/lang/CharSequence;I)Landroid/widget/Toast;", QtAndroid::androidActivity().object(), _text.object(), jint(duration)); toast.callMethod<void>("show"); }); } This is running!

If you want to follow this bug here is the link: https://bugreports.qt.io/browse/QTBUG-55085 RickLinux

For everyone else who is have the same problem, this did the trick: .pro file: android { data.files = db/flags.sqlite data.path = /assets/db INSTALLS += data } .cpp file QFile dfile("assets:/db/flags.sqlite"); QString filePath = QStandardPaths::writableLocation( QStandardPaths::StandardLocation::AppLocalDataLocation ); filePath.append( "/flags.sqlite"); if (dfile.exists()) { if( QFile::exists( filePath ) ) QFile::remove( filePath ); if( dfile.copy( filePath ) ) QFile::setPermissions( filePath, QFile::WriteOwner | QFile::ReadOwner ); } d->database.setDatabaseName( filePath ); #else d->database.setDatabaseName( "db/flags.sqlite" ); #endif if( d->database.open() ) { qDebug( "DB open successful "); QSqlQuery q(d->database); q.exec("SELECT * from flags"); q.last(); d->dbSize = q.at() + 1; } else { qDebug( "DB failed" ); } } Link: Click me

I think, if you don't use Java code via Android Extras relying on a higher API level, you can start with the lowest one supported by Qt this means 18 for Qt 5.7 can someone confirm ?

@DRoscoe Thanks so much, I really appreciate you taking time to respond!

@kumararajas From what I know, Milian Wolff from KDAB is working on bringing newer WebKit to Qt 4, ping milian on #qt-labs to know if this option is available and how much it would cost. It should also be possible to bring Qt 4 support to https://github.com/annulen/webkit, but you would need to hire Milian or someone else

I met the same problem as you, I had solved the error by uninstalling two diffirent version Qt creators in my pc. Keep the last version Qt creator on my windows8.1. I tried , builded and ran, it installed successfully the apk on my android device.

@jsulm The problem is CONFIGURING QtCreator. Apparently no one here knows how to do that for windows to pi cross compile and debug. I gave up on QT and have succeeded to do just that with Eclipse, their suggested toolchain and detailed configuration docs. So for my purposes, no need to continue this thread.

Hi and welcome to devnet, Since your are new to all of that, I'd recommend asking to use a virtual machine with Linux on it. It will make the setup way easier that way.

Hi, I found your topic and i have a problem with a SIGSEGV at the start of qt application when i used gdb. Your patch work with a previous problem i have with breakpoints but no with this one so have you an idea ? I'm using an imx6 platform with EGLFS and when upgrading Qt from 5.3.2 to 5.5.1, I can't start a debug. I try to backtrace in qtcreator but i can't find anything to help. Thanks, Here it's a part of gdb log. >909-exec-run Process AW_APP created; pid = 1370 >library-loaded,id="/lib/ld-linux-armhf.so.3",target-name="/lib/ld-linux-armhf.so.3",host-name="/opt/fsl-imx-fb/4.1.15-1.2.0/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/lib/ld-linux-armhf.so.3",symbols-loaded="0",thread-group="i1" Library /lib/ld-linux-armhf.so.3 loaded >909^running dNOTE: ENGINE RUN AND INFERIOR RUN OK sRunning. dState changed from EngineRunRequested(7) to InferiorRunOk(11) [master] dINFERIOR STARTED sDémarrage de l'application >*running,thread-id="all" dNOTE: INFERIOR STILL RUNNING IN STATE InferiorRunOk. >~"\nProgram received signal " >~"SIGSEGV, Segmentation fault.\n" >~"0x4dca9e24 in ?? ()\n" >*stopped,reason="signal-received",signal-name="SIGSEGV",signal-meaning="Segmentation fault",frame={addr="0x4dca9e24",func="??",args=[]},thread-id="1",stopped-threads="all",core="0" dNOTE: INFERIOR SPONTANEOUS STOP sStopped. > 914bt full >&"bt full\n" >~"#-1 0x4dca9e24 in ?? ()\n" >~"No symbol table info available.\n" >&"warning: Unable to restore previously selected frame.\n" Unable to restore previously selected frame. >914^done

@Mathan-M see this

Hi, I'd recommend posting that question to the the QtWebEngine mailing list. You'll find there QtWebEngine's developers/maintainers. This forum is more user oriented.

@micland I thought of that but discarded the idea because Raspbian seems to be the de facto standard distribution for RPi, and IMHO the mkspec should work out-of-the-box with the Rasbian library paths. Or at least there should be a mkspec for Raspbian. Also, if I understand it right, the symlinks won't fix the run time error. (But I have to admit I am not at all sure I understand it right.) One thing that puzzles me is the big difference between RPi3 and RPi2 mkspecs. Wouldn't it be enough to change the processor optimization flags?

Install latest mingw... I had problems with make without it...

@tekojo I knew something wasn't right :D

@romsharkov You may use a custom theme to turn off the ActionBar. Example: quickandroid/apptheme.xml at master · benlau/quickandroid quickandroid/AndroidManifest.xml at master · benlau/quickandroid Document: Complete Guide to Making a Splash Screen for your QML Android Application — Medium

Thanks @Mathan-M, It also worked for me. I think we can mark this as solved.