[Interest] Random problems with QSettings on Android

[Edward Sutton]

>Does anyone here had problems with QSettings persistence on Android device?
>I’m having random and occasional reports from users on Android telling me that settings don’t persist.

I have not seen *random* issues with QSettings on Android.

I have seen issues with users swiping the app and closing it that did not give my widget app a chance to save settings.

Adding the following solved the problem by giving me chance to save settings:


#ifdef PLATFORM_ANDROID

/// Use signal QGuiApplication::applicationStateChanged(Qt::ApplicationState state)

/// to catch Android and hopefull iOS users pressing the home or multi-task button.

/// Under Android, users can press rectangular multi-task button,

/// this will change state to Qt:ApplicationInactive.

///

/// When exiting Qt::ApplicationActive state, save settings.

///

/// Is there any reason to disable this for desktop platforms?

void MainWindow::applicationStateChanged(Qt::ApplicationState state)

{

    qDebug("Qt::ApplicationState %i", state);

    static Qt::ApplicationState oldState = Qt::ApplicationSuspended;

    if(oldState == state)

    {

        return;

    }

    oldState = state;

    if(Qt::ApplicationActive == state )

    {


        // Fix attempt for Android half-portrait-screen on start-up

        // Issue is reproducible on Sansung S4

        // Bug 468 - [Android] App window size not full-screen on first open

        // http://subsitedesign/bugzilla/show_bug.cgi?id=468

        showMaximized();


        return;

    }

    // This uses QSettings underneath

    Settings::write(Settings::settings(), this);

}

#endif




On May 26, 2015, at 5:37 AM, Imaginando <info at imaginando.pt<mailto:info at imaginando.pt>> wrote:

Hi,

Does anyone here had problems with QSettings persistence on Android device?

I’m having random and occasional reports from users on Android telling me that settings don’t persist.

Thanks,

Regards,

Nuno

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