[Interest] Qt for Android 6.8.0 & cmake - Setting package Name

Nuno Santos nuno.santos at imaginando.pt
Fri Oct 18 12:14:22 CEST 2024 

Hi,

While I still don’t know the exact cause of the following crash:

>> E AndroidRuntime: java.lang.RuntimeException: Unable to pause activity {com.imaginando.drc/org.qtproject.qt.android.bindings.QtActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.qtproject.qt.android.QtDisplayManager.unregisterDisplayListener()' on a null object reference

I know how to workaround it. 

In my app directory I have many subfolders and files, for variations for the app as a plugin.

If I create a directory specific to the android variation and move the CMakeLists.txt file into there, the problem goes aways.

My guess is that the build system is going through all this files and making awkward tooling decisions based on what it finds.

Regards,

Nuno

> On 18 Oct 2024, at 07:11, ekke <ekke at ekkes-corner.org> wrote:
> 
> Hi Nuno,
> it seems your problems with package name and set_target_properties are fixed now.
> 
> you're trying to port an Android app to 6.8.0 CMake
> is this a 6.8.0 QMake app or 6.7.x or ??
> 
> ekke
> 
> Am 18.10.24 um 00:17 schrieb Nuno Santos:
>> Assam,
>> 
>> Thank you very much for your reply. It helped a lot.
>> 
>> Unfortunately I’m still having the same crash when launching the application and I don’t know what this means:
>> 
>> E AndroidRuntime: FATAL EXCEPTION: main
>> E AndroidRuntime: Process: com.imaginando.drc, PID: 2776
>> E AndroidRuntime: java.lang.RuntimeException: Unable to pause activity {com.imaginando.drc/org.qtproject.qt.android.bindings.QtActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.qtproject.qt.android.QtDisplayManager.unregisterDisplayListener()' on a null object reference
>> E AndroidRuntime: 	at android.app.ActivityThread.performPauseActivityIfNeeded(ActivityThread.java:4031)
>> E AndroidRuntime: 	at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3986)
>> E AndroidRuntime: 	at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3938)
>> E AndroidRuntime: 	at android.app.servertransaction.PauseActivityItem.execute(PauseActivityItem.java:45)
>> 
>> Can you please enlighten me?
>> 
>> Thank you!
>> 
>> Best regards,
>> 
>> Nuno
>> 
>>> On 17 Oct 2024, at 18:59, Assam Boudjelthia <assam.boudjelthia at qt.io> <mailto:assam.boudjelthia at qt.io> wrote:
>>> 
>>> Hey,
>>> 
>>> We have some examples that use that, you could take a look at https://github.com/qt/qtdoc/blob/6.8/examples/demos/coffee/CMakeLists.txt#L72
>>> 
>>> Regards,
>>> Assam
>>> 
>>>> On Oct 17, 2024, at 8:45 PM, ekke <ekke at ekkes-corner.org> <mailto:ekke at ekkes-corner.org> wrote:
>>>> 
>>>> Am 17.10.24 um 19:07 schrieb Nuno Santos:
>>>>> Ekke,
>>>>> 
>>>>> Thanks once again for the reply. I had the following when using the snippet you provided to me:
>>>>> 
>>>>> [cmake] CMake Error at CMakeLists.txt:48 (set_target_properties):
>>>>> [cmake]   set_target_properties called with incorrect number of arguments.
>>>>> 
>>>>> Any ideas?
>>>>> 
>>>> Hi Nuno,
>>>> 
>>>> please paste your set_target_properties command
>>>> 
>>>>> 
>>>>> 
>>>>> Is there any official Qt project example for more advance usage? For instance when we need to extend the activity?
>>>>> 
>>>>> In all this years, the experience I have with Qt for Android is that if I need to update Qt and I need to update and android app, I always stumble on a big mess that makes me invest a lot of time. This is not a Quick approach…
>>>> to be fair: Google and Apple always are changing workflows, APIs, requirements...
>>>>> 
>>>>> I don’t know if other developers share the same opinion.
>>>> yep - always the same. this time it was even more time to spend:port apps from 5.15 to 6.6 and then port from QMake to CMake.
>>>> 
>>>> because it's not so easy to get the needed informations I'm writing my blog pages ;-)
>>>> 
>>>> ekke
>>>> 
>>>>> 
>>>>> Best,
>>>>> 
>>>>> Nuno
>>>>> 
>>>>>> On 17 Oct 2024, at 17:57, ekke <ekke at ekkes-corner.org> <mailto:ekke at ekkes-corner.org> wrote:
>>>>>> 
>>>>>> Nuno,
>>>>>>  you also have to set the target properties
>>>>>> 
>>>>>> set_target_properties(${MY_APP}
>>>>>>     PROPERTIES
>>>>>>     QT_ANDROID_PACKAGE_SOURCE_DIR ${QT_ANDROID_PACKAGE_SOURCE_DIR}
>>>>>>     QT_ANDROID_MIN_SDK_VERSION ${QT_ANDROID_MIN_SDK_VERSION}
>>>>>>     QT_ANDROID_TARGET_SDK_VERSION ${QT_ANDROID_TARGET_SDK_VERSION}
>>>>>>     QT_ANDROID_PACKAGE_NAME ${QT_ANDROID_PACKAGE_NAME}
>>>>>>     QT_ANDROID_VERSION_NAME ${QT_ANDROID_VERSION_NAME}
>>>>>>     QT_ANDROID_VERSION_CODE ${QT_ANDROID_VERSION_CODE}
>>>>>> )
>>>>>> hope this helps
>>>>>> 
>>>>>> BTW: you also can take a look at https://t1p.de/ekkeCMakeAndroid
>>>>>> (have to tune some parts of my Qt-mobile-CMake docs, but ATM I'm still with 6.7 and QMake - waiting for a fix because of nested QML dirs coming in 6.8.1)
>>>>>> 
>>>>>> ekke
>>>>>> 
>>>>>> 
>>>>>> Am 17.10.24 um 18:41 schrieb Nuno Santos:
>>>>>>> Ekke,
>>>>>>> 
>>>>>>> Thanks for your reply. I’ve tried to set in my CMakeLists.txt:
>>>>>>> 
>>>>>>> set(QT_ANDROID_PACKAGE_NAME "com.imaginando.drc”)
>>>>>>> 
>>>>>>> And it did nothing. The problem persists. And when running the application I have:
>>>>>>> 
>>>>>>> E AndroidRuntime: FATAL EXCEPTION: main
>>>>>>> E AndroidRuntime: Process: org.qtproject.example.drc, PID: 13589
>>>>>>> E AndroidRuntime: java.lang.RuntimeException: Unable to pause activity {org.qtproject.example.drc/org.qtproject.qt.android.bindings.QtActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.qtproject.qt.android.QtDisplayManager.unregisterDisplayListener()' on a null object reference
>>>>>>> E AndroidRuntime: 	at android.app.ActivityThread.performPauseActivityIfNeeded(ActivityThread.java:5557)
>>>>>>> E AndroidRuntime: 	at android.app.ActivityThread.performPauseActivity(ActivityThread.java:5508)
>>>>>>> E AndroidRuntime: 	at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:5460)
>>>>>>> 
>>>>>>> Also, in the bug report someone says:
>>>>>>> 
>>>>>>> Qt 6.7.2 and 6.8.0 will support for using namespace in build.gradle and using AndroidManifest.xml without <package> tag.
>>>>>>> The new CMake property QT_ANDROID_PACKAGE_NAME comes to 6.8.0.
>>>>>>> For Qt Creator 14, it will support using namespace from build.gradle and support using AndroidManifest.xml without <package> tag.
>>>>>>> 
>>>>>>> And none of this options work also. I’m using Qt 6.8.0 with Qt Creator 14.0.2
>>>>>>> 
>>>>>>> Any ideas?
>>>>>>> 
>>>>>>> Regards,
>>>>>>> 
>>>>>>> Nuno
>>>>>>> 
>>>>>>>> On 17 Oct 2024, at 17:30, ekke <ekke at ekkes-corner.org> <mailto:ekke at ekkes-corner.org> wrote:
>>>>>>>> 
>>>>>>>> In Qt 6.8 you can set QT_ANDROID_PACKAGE_NAME
>>>>>>>> see also: https://bugreports.qt.io/browse/QTBUG-106907
>>>>>>>> 
>>>>>>>> ekke
>>>>>>>> Am 17.10.24 um 17:58 schrieb Nuno Santos via Interest:
>>>>>>>>> Hi,
>>>>>>>>> 
>>>>>>>>> I’m trying to port an application to Cmake in Qt for Android.
>>>>>>>>> 
>>>>>>>>> I’m not able to set the package name. I set it in QtCreator, it gets modified in AndroidManifest.xml but then, when AndroidManifest.xml is copied to the build, it has a different value and I have warning from gradle:
>>>>>>>>> 
>>>>>>>>> Value set in QtCreator: com.imaginando.drc
>>>>>>>>> 
>>>>>>>>> package="org.qtproject.example.drc" found in source AndroidManifest.xml: /private/tmp/drc/build/Android_Qt_6_8_0_Clang_arm64_v8a-Debug/android-build-drc/AndroidManifest.xml.
>>>>>>>>> Setting the namespace via the package attribute in the source AndroidManifest.xml is no longer supported, and the value is ignored.
>>>>>>>>> Recommendation: remove package="org.qtproject.example.drc" from the source AndroidManifest.xml: /private/tmp/drc/build/Android_Qt_6_8_0_Clang_arm64_v8a-Debug/android-build-drc/AndroidManifest.xml.
>>>>>>>>> 
>>>>>>>>> I’ve tried to set it build.gradle as it is below without success:
>>>>>>>>> 
>>>>>>>>> android {
>>>>>>>>> namespace “com.imaginando.drc"
>>>>>>>>> 
>>>>>>>>> Any ideas on how to workaround this or what is the best practice?
>>>>>>>>> 
>>>>>>>>> Thanks!
>>>>>>>>> 
>>>>>>>>> Nuno
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> _______________________________________________
>>>>>>>>> Interest mailing list
>>>>>>>>> Interest at qt-project.org <mailto:Interest at qt-project.org>
>>>>>>>>> https://lists.qt-project.org/listinfo/interest
>>>>>>>>> 
> 
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