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Bug
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Resolution: Fixed
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P2: Important
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None
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6.9.0
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None
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Android
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2025wk20s1QtforAndroid
I'm migrating some code from Qt 6.2.2 to 6.9.0 under Android.
I have some code looking in the application folder for .so files (for potential plugins to be loaded). This code used to iterate the app folder using standard std::filesystem code. It does not work anymore. I can iterate the HOME folder, but not the app folder. Surprisingly QDir is able to do so, but my code doing this is pure C++/STL code, I cannot use Qt at this level.
Did something change in apk structure? Why STL cannot see the app folder? Is there any workaround?
Here is a very simple sample program:
#include <QApplication>
#include <QMainWindow>
#include <QLabel>
#include <QDebug>
#include <QDir>
#include <filesystem>
void listDirContent(QString path)
{
{
QDir dir(path);
qDebug() << "Using Qt, " << path << ":";
for (auto file : dir.entryList())
qDebug() << file;
}
{
std::string std_path = path.toStdString();
qDebug() << "using std, " << std_path.c_str() << ":";
std::filesystem::directory_iterator itDir;
std::filesystem::directory_iterator itEnd;
std::filesystem::path Path;
try
{
itDir = std::filesystem::directory_iterator(std_path);
qDebug() << "Found files:";
for (; itDir != itEnd; itDir++)
{
qDebug() << QString(itDir->path().c_str());
}
qDebug() << "end files";
}
catch (...)
{
qDebug() << "FAILED";
}
}
}
int main( int argc, char* argv[] )
{
QApplication app(argc, argv);
QMainWindow wnd;
wnd.setCentralWidget(new QLabel("Hello",&wnd));
wnd.show();
listDirContent(qApp->applicationDirPath());
listDirContent(QDir::homePath());
return app.exec();
}
This program outputs:
D/default (18701): Using Qt, "/data/app/org.qtproject.example.TestListDir-UzLzgFYV8gnNNAzUQkD1Lw==/base.apk!/lib/armeabi-v7a" : D/default (18701): "armeabi-v7a" D/default (18701): "libc++_shared.so" D/default (18701): "libplugins_iconengines_qsvgicon_armeabi-v7a.so" D/default (18701): "libplugins_imageformats_qgif_armeabi-v7a.so" D/default (18701): "libplugins_imageformats_qico_armeabi-v7a.so" D/default (18701): "libplugins_imageformats_qjpeg_armeabi-v7a.so" D/default (18701): "libplugins_imageformats_qsvg_armeabi-v7a.so" D/default (18701): "libplugins_platforms_qtforandroid_armeabi-v7a.so" D/default (18701): "libplugins_styles_qandroidstyle_armeabi-v7a.so" D/default (18701): "libQt6Core_armeabi-v7a.so" D/default (18701): "libQt6Gui_armeabi-v7a.so" D/default (18701): "libQt6Svg_armeabi-v7a.so" D/default (18701): "libQt6Widgets_armeabi-v7a.so" D/default (18701): "libTestListDir_armeabi-v7a.so" D/default (18701): using std, /data/app/org.qtproject.example.TestListDir-UzLzgFYV8gnNNAzUQkD1Lw==/base.apk!/lib/armeabi-v7a : D/default (18701): FAILED D/default (18701): Using Qt, "/data/user/0/org.qtproject.example.TestListDir/files" : D/default (18701): "." D/default (18701): ".." D/default (18701): "profileInstalled" D/default (18701): "profileinstaller_profileWrittenFor_lastUpdateTime.dat" D/default (18701): using std, /data/user/0/org.qtproject.example.TestListDir/files : D/default (18701): Found files: D/default (18701): /data/user/0/org.qtproject.example.TestListDir/files/profileinstaller_profileWrittenFor_lastUpdateTime.dat D/default (18701): /data/user/0/org.qtproject.example.TestListDir/files/profileInstalled D/default (18701): end files
See that std::filesystem is unable to iterate `/data/app/org.qtproject.example.TestListDir-UzLzgFYV8gnNNAzUQkD1Lw==/base.apk!/lib/armeabi-v7a` folder.
With Qt 6.2.2, it used to list the files from the app folder (which was slightly different, there was no "base.apk!" in path.
I would appreciate if there is any deployment option that could be set to fix this issue.