purpose of android folder?

mzimmers

Hi all -

I'm trying to correctly build and deploy the example on this page. I notice that the CMakeLists.txt file expects an android folder under the main project folder.

am I expected to create this myself?
what (if anything) do I put into it?
do I need to change any build settings for using it?

Thanks...

JoeCFD

You have to have it by yourself or from qt creator. I made it by myself and set all build files(for android and linux with qmake and cmake) under one dir(s)=buildfiles.
ANDROID_PACKAGE_SOURCE_DIR = $$PWD/../android <==in qmake
set( ANDROID_PACKAGE_SOURCE_DIR ${PROJECT_SOURCE_DIR}/buildfiles/android CACHE INTERNAL "" ) <==in cmake

Contents in it are: gradle stuff(generated by qtcreator), AndroidManifest.xml, app icon settings, your interface to android Java, etc.

mzimmers

@JoeCFD when you say "build files" does that mean your source files (.qml, .svg, etc)?

I have a similar entry in the CMakeLists.txt file from the example, but when I try to run, I get this error:

W libappaccelbubble_x86_64.so: QQmlApplicationEngine failed to load component
W libappaccelbubble_x86_64.so: qrc:/bubble/main.qml: No such file or directory

JoeCFD

@mzimmers no, do not get confused. I have a bunch of pri(s) and cmake files for android and Linux builds. I simply organize them in one dir(buildfiles) + subdirs. android dir is under buildfiles.

mzimmers

@JoeCFD OK, so then why am I getting the error above? It goes away if I comment out the "/android" part of the line you posted (for CMake).

JoeCFD

@mzimmers https://doc.qt.io/qt-6/cmake-target-property-qt-android-package-source-dir.html

mzimmers

@JoeCFD the example I cited in my original post has this in its CMakeLists.txt file:

set_property(TARGET appaccelbubble APPEND PROPERTY
    QT_ANDROID_PACKAGE_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/android
)

If I build the example as-is, I get the error I posted. If I comment out the "/android" it works.

I'm asking why that is.

JoeCFD

@mzimmers message( "=============${CMAKE_CURRENT_SOURCE_DIR}") ==>print out to see the path.
it is possible that CMAKE_CURRENT_SOURCE_DIR has /android

mzimmers

@JoeCFD

=============C:/Users/Michael.Zimmers/Qt_projects/bubble

JoeCFD

@mzimmers sorry I did not realize this one QT_ANDROID_PACKAGE_SOURCE_DIR was introduced in Qt6. Mine is ANDROID_PACKAGE_SOURCE_DIR in qt 5 apps. It is the case that QT_ANDROID_PACKAGE_SOURCE_DIR does not need /android. I have not started to use Qt6.

mzimmers

Oh...so this is something of a Qt 5 artifact? OK, that makes sense...I guess whoever maintains the Qt examples missed this (I did pull it from the Qt 6 examples).

So...now, let's turn this question around: let's say I want to use this folder, so all those Android files don't clutter up my main folder. How do I enable that?

JoeCFD

@mzimmers do not mess up with android folder unless it is necessary. I put it under buildfiles since you may have some .cmake files.

mzimmers

@JoeCFD OK, so do I need this folder under my main project folder? So far, it looks like I can do without it.

JoeCFD

@mzimmers You can put it anywhere, but set its path with QT_ANDROID_PACKAGE_SOURCE_DIR. You do not need it now because all its contents may have been copied into android-build. Where does your app get AndroidManifest.xml if your build dir is removed? This dir is part of your android app.