QGeoPositionInfoSource initialization problem

**codestain** · 2011-02-26, 20:14

Greetings!

I 'm trying to make a gps app for symbian abd currently my main problem is this.

Code:
Header file:

Code:

QPointer<QGeoPositionInfoSource> locationDataSource;

Source file:

Code:

void main::startGPS()
{
locationDataSource = QGeoPositionInfoSource::createDefaultSource(this);
locationDataSource->setPreferredPositioningMethods(QGeoPositionInfoSource::AllPositioningMethods);

connect(locationDataSource, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));

locationDataSource->startUpdates();
}

On the simulator it works just fine. When I try it on my Symbian device, when this function is executed it crashes.

Any ideas?
Thanks

**skumar_rao** · 2011-02-27, 01:59

My best guess is you have not added required capabilities NETWORK and LOCATION. (more clearer if you post your .pro file).
Usually for on device crashes if you can find the crash code it will be easier to find the reason behind it.

**codestain** · 2011-02-27, 09:03

No, it's all there..

Here's my .pro:

Code:

QT+= core gui
QT+= network

TARGET = Location
TEMPLATE = app


SOURCES += main.cpp\
        location.cpp

HEADERS  += location.h

FORMS    += location.ui

CONFIG += mobility
MOBILITY = location

symbian {
    TARGET.UID3 = 0xe75b916d
    # TARGET.CAPABILITY += NetworkServices \ Location
    TARGET.EPOCSTACKSIZE = 0x14000
    TARGET.EPOCHEAPSIZE = 0x020000 0x800000
}

ICON = icon.svg

RESOURCES += \
    Location_images.qrc

Maybe it's some memory allocation problem caused by the

Code:

locationDataSource = QGeoPositionInfoSource::createDefaultSource(this);

that I can't fix..

**skumar_rao** · 2011-02-27, 09:34

I can see you have commented out the

Code:

symbian {
    TARGET.UID3 = 0xe75b916d
    # TARGET.CAPABILITY += NetworkServices \ Location
    TARGET.EPOCSTACKSIZE = 0x14000
    TARGET.EPOCHEAPSIZE = 0x020000 0x800000
}

can you remove # and generate the sis .. make are in your generated .mmp file you have both the capabilities added in.

**codestain** · 2011-02-27, 10:27

Nope, it still crashes.

What else could it be?

**skumar_rao** · 2011-02-27, 11:41

can you show your generated mmp file.
also it is very helpful if you can find the Error Code for the crash.

**codestain** · 2011-02-27, 11:47

I put some extra capabilities that I need for messaging, that's why they show up here..

MMP file:

Code:

// ==============================================================================
// Generated by qmake (2.01a) (Qt 4.6.3) on: 2011-02-27T13:43:25
// This file is generated by qmake and should not be modified by the
// user.
//  Name        : MMSLocation.mmp
// ==============================================================================

TARGET		MMSLocation.exe
TARGETTYPE		EXE

UID		0x100039CE 0xe75b916d
SECUREID		0xe75b916d

EPOCSTACKSIZE		0x14000
EPOCHEAPSIZE		0x020000 0x800000

SOURCEPATH			. 
LANG SC 
START RESOURCE		MMSLocation.rss
HEADER
TARGETPATH			/resource/apps
END

SOURCEPATH			.
START RESOURCE		MMSLocation_reg.rss
TARGETPATH		/private/10003a3f/import/apps
END


// Qt Macros
MACRO		UNICODE
MACRO		QT_KEYPAD_NAVIGATION
MACRO		QT_SOFTKEYS_ENABLED
MACRO		QT_USE_MATH_H_FLOATS
MACRO		QT_GUI_LIB
MACRO		QT_NETWORK_LIB
MACRO		QT_CORE_LIB

SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtCore
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtCore/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtNetwork
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtNetwork/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtGui
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtGui/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtMessaging
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtMessaging/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtContacts
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtContacts/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtLocation
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/include/QtLocation/tmp
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/mkspecs/common/symbian
SYSTEMINCLUDE		../../../NokiaQtSDK/Symbian/SDK/mkspecs/common/symbian/tmp
SYSTEMINCLUDE		/epoc32/include
SYSTEMINCLUDE		/epoc32/include/osextensions/stdapis
SYSTEMINCLUDE		/epoc32/include/osextensions/stdapis/sys
SYSTEMINCLUDE		/epoc32/include/stdapis
SYSTEMINCLUDE		/epoc32/include/stdapis/sys
SYSTEMINCLUDE		/epoc32/include/oem
SYSTEMINCLUDE		/epoc32/include/middleware
SYSTEMINCLUDE		/epoc32/include/domain/middleware
SYSTEMINCLUDE		/epoc32/include/osextensions
SYSTEMINCLUDE		/epoc32/include/domain/osextensions
SYSTEMINCLUDE		/epoc32/include/applications
SYSTEMINCLUDE		/epoc32/include/domain/applications
SYSTEMINCLUDE		/epoc32/include/domain/osextensions/loc
SYSTEMINCLUDE		/epoc32/include/domain/middleware/loc
SYSTEMINCLUDE		/epoc32/include/domain/applications/loc
SYSTEMINCLUDE		/epoc32/include/domain/osextensions/loc/sc
SYSTEMINCLUDE		/epoc32/include/domain/middleware/loc/sc
SYSTEMINCLUDE		/epoc32/include/domain/applications/loc/sc
SYSTEMINCLUDE		../../../QtLocation
SYSTEMINCLUDE		../../../QtLocation/tmp
SYSTEMINCLUDE		../../../QtContacts
SYSTEMINCLUDE		../../../QtContacts/tmp
SYSTEMINCLUDE		../../../QtMessaging
SYSTEMINCLUDE		../../../QtMessaging/tmp
SYSTEMINCLUDE		/epoc32/include/osextensions/stdapis/stlport
SYSTEMINCLUDE		/epoc32/include/stdapis/stlport
SYSTEMINCLUDE		moc
SYSTEMINCLUDE		moc/tmp
SYSTEMINCLUDE		ui
SYSTEMINCLUDE		ui/tmp
SYSTEMINCLUDE		.
SYSTEMINCLUDE		tmp
SYSTEMINCLUDE		rcc
SYSTEMINCLUDE		rcc/tmp

SOURCEPATH 	.
SOURCE		main.cpp
SOURCE		mmslocation.cpp

SOURCEPATH 	moc
SOURCE		moc_mmslocation.cpp

SOURCEPATH 	rcc
SOURCE		qrc_MMSLocation_images.cpp


LIBRARY		QtLocation.lib
LIBRARY		QtContacts.lib
LIBRARY		QtMessaging.lib
LIBRARY		libstdcpp.lib
LIBRARY		QtGui.lib
LIBRARY		QtNetwork.lib
LIBRARY		QtCore.lib
LIBRARY		libc.lib
LIBRARY		libm.lib
LIBRARY		euser.lib
LIBRARY		libdl.lib
STATICLIBRARY	qtmain.lib

CAPABILITY		NetworkServices\Location\ReadUserData\ReadDeviceData 

OPTION CW -wchar_t on
OPTION ARMCC --visibility_inlines_hidden
#if defined(ARMCC_4_0)
OPTION ARMCC --import_all_vtbl
#endif
OPTION GCCE -fvisibility-inlines-hidden

VERSION 10.0

ARMFPU softvfp

PAGED

BYTEPAIRCOMPRESSTARGET

OPTION_REPLACE ARMCC --export_all_vtbl -D__QT_NOEFFECTMACRO_DONOTUSE

USERINCLUDE .

It doesn't crash on the simulator to start watching the code one by one...

**skumar_rao** · 2011-02-27, 12:07

i suggest you clean your intermediate of project files then try again.

Note that Symbian Builds give more problematic then other platforms if you donot take care.

**codestain** · 2011-02-27, 12:22

I have a 5800 for testing. Maybe the memory is too small to handle the application..

**skumar_rao** · 2011-02-27, 13:13

can not be sure . i suggest you install errrd to get the panic code. [search wiki for how to]

**codestain** · 2011-03-01, 12:11

I changed the capabilities format from

Code:

TARGET.CAPABILITY += NetworkServices \ Location

to

Code:

TARGET.CAPABILITY = NetworkServices Location

and it worked. Don't know why and how, but I'm glad it did.

Now I'm trying to send a MMS but it doesn't seem to be sent, although the QMessageService::State error says that it did.

Do I need any extra capabilities just to send a MMS?

Code:

CONFIG += mobility
MOBILITY += location
MOBILITY += messaging

TARGET.CAPABILITY = NetworkServices Location

Thanks for your help so far

**lovesunset21** · 2011-04-13, 03:56

Originally Posted by codestain

Greetings!

I 'm trying to make a gps app for symbian abd currently my main problem is this.

Code:
Header file:

Code:

QPointer<QGeoPositionInfoSource> locationDataSource;

Source file:

Code:

void main::startGPS()
{
locationDataSource = QGeoPositionInfoSource::createDefaultSource(this);
locationDataSource->setPreferredPositioningMethods(QGeoPositionInfoSource::AllPositioningMethods);

connect(locationDataSource, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));

locationDataSource->startUpdates();
}

On the simulator it works just fine. When I try it on my Symbian device, when this function is executed it crashes.

Any ideas?
Thanks

Hi, I also try the code. However it displays the error:

ISO C++ forbids declaration of 'QPointer' with no type

at QPointer<QGeoPositionInfoSource> locationDataSource;

Please help me. I am looking forward to your reply. Thank you.

**skumar_rao** · 2011-04-13, 04:07

Originally Posted by lovesunset21

Hi, I also try the code. However it displays the error:

ISO C++ forbids declaration of 'QPointer' with no type

at QPointer<QGeoPositionInfoSource> locationDataSource;

Please help me. I am looking forward to your reply. Thank you.

did you add any of the QtCore headers in your header file. if not try using #include <QPointer> should fix your problem.

**lovesunset21** · 2011-04-13, 05:11

Hi, how's about the error QPointer? Any ideas? Thank you.

**skumar_rao** · 2011-04-13, 05:21

Originally Posted by skumar_rao

did you add any of the QtCore headers in your header file. if not try using #include <QPointer> should fix your problem.

Originally Posted by lovesunset21

Hi, how's about the error QPointer? Any ideas? Thank you.

did not it solved the problem .. if not can you show the error output from the QtCreater as it is ..

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