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

Assam Boudjelthia assam.boudjelthia at qt.io
Fri Oct 18 15:16:28 CEST 2024 

Checking your example, I believe your issue is most likely this https://bugreports.qt.io/browse/QTBUG-129946, there’s a workaround there also.

Regards,
Assam

On Oct 18, 2024, at 1:44 PM, Nuno Santos <nuno.santos at imaginando.pt> wrote:

Assam,

I’ve attached an example that reproduces the crash. The cause seems to be fairly simple. There is a sub dir with a qml file called imports.qml and the content is also simple:

import QtQuick 2.12
import QtQuick.Controls 1.4
import QtQuick.Controls 2.12
import QtQuick.Layouts 1.12
import QtGraphicalEffects 1.0
import QtMultimedia 5.12
import QtQuick.Extras 1.4
import QtQuick.Dialogs 1.2

Item {

}

I have this in all my projects because I build several targets that share the same core code, VST, VST3, AU, AUV3 audio plugin formats. To avoid compiling the same things over and over I have to split in shared lib (code and resources shared among several applications) and common lib (code & resources for that application).

When linking a single target, this was a way to tell the qmllinter the plugins it needs to link with.

Thank you!

Best,

Nuno

On 18 Oct 2024, at 11:28, Assam Boudjelthia <assam.boudjelthia at qt.io> wrote:

Hey,

This seems the same as QTBUG-129704<x-msg://5/QTBUG-129704> that I saw few days ago, it’s now flaky in CI and I haven’t reproduced it locally, it’s being worked on though. It would be helpful if you provide a minimal reproduction project for it under that ticket.

Best regards,
Assam

On Oct 18, 2024, at 9:11 AM, 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


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