Android runtime permissons

[krokstr]

Hello,

I'm trying to make my app with runtime permissions, but with the snippets so far tried, I've only managed to crash the app.

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);
    keep_screen_on(true);

//---------------SNIPPET_1-------------------
    auto  result = QtAndroid::checkPermission(QString("android.permission.CAMERA"));
    if(result == QtAndroid::PermissionResult::Denied){
        QtAndroid::PermissionResultMap resultHash = QtAndroid::requestPermissionsSync(QStringList({"android.permission.CAMERA"}));
        if(resultHash["android.permission.CAMERA"] == QtAndroid::PermissionResult::Denied)
            return 0;
    }
//-----------------OR-------------------------
//For this one, I do have declared "const  QVector<QString> permissions({"android.permission.ACCESS_COARSE_LOCATION", "android.permission.BLUETOOTH"});

    //Request requiered permissions at runtime
    for(const QString &permission : permissions){
        auto result = QtAndroid::checkPermission(permission);
        if(result == QtAndroid::PermissionResult::Denied){
            auto resultHash = QtAndroid::requestPermissionsSync(QStringList({permission}));
            if(resultHash[permission] == QtAndroid::PermissionResult::Denied)
                return 0;
        }
    }

//-------------------END---------------------

    QQmlApplicationEngine engine;
    anyclass Anyclass;

    QStringList dataList;
    QStringList windowNames;
    windowNames.append("P1");
    windowNames.append("P2");
    windowNames.append("P3");
    windowNames.append("P4");

    Anyclass.on_reload_list();
    dataList = Anyclass.m_Lmodel;

    qmlRegisterType<StatusBar>("StatusBar", 0, 1, "StatusBar");
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
    engine.rootContext()->setContextProperty("Anyclass", &Anyclass);
    engine.rootContext()->setContextProperty("myModel", QVariant::fromValue(dataList));
    engine.rootContext()->setContextProperty("windowModel", QVariant::fromValue(windowNames));
    QObject *rootObject = engine.rootObjects().first();
    Anyclass.get_qml_obj(rootObject);

    if (engine.rootObjects().isEmpty())
        return -1;

    QtAndroid::hideSplashScreen();


    return app.exec();
}

Some other thing I've found is this, but I don't know how can I use it:

Using QAndroidJniObject::callStaticMethod<void>()
And the java code:

public static void requestPermission(QtActivity activity){
            activity.requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.READ_EXTERNAL_STORAGE}, 1);

        }

Can you provide me with a working code or correct my usage of the current one ?

Thanks!

[J.Hilk]

@krokstr said in Android runtime permissons:

Can you provide me with a working code or correct my usage of the current one ?

Thanks!

sure, from my current project

#if defined (Q_OS_ANDROID)
#include <QtAndroid>

bool requestAndroidPermissions(){
    //Request requiered permissions at runtime

    const QVector<QString> permissions({"android.permission.ACCESS_COARSE_LOCATION",
                                        "android.permission.BLUETOOTH",
                                        "android.permission.BLUETOOTH_ADMIN",
                                        "android.permission.INTERNET",
                                        "android.permission.WRITE_EXTERNAL_STORAGE",
                                        "android.permission.READ_EXTERNAL_STORAGE"});

    for(const QString &permission : permissions){
        auto result = QtAndroid::checkPermission(permission);
        if(result == QtAndroid::PermissionResult::Denied){
            auto resultHash = QtAndroid::requestPermissionsSync(QStringList({permission}));
            if(resultHash[permission] == QtAndroid::PermissionResult::Denied)
                return false;
        }
    }

    return true;
}
#endif

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

#if defined (Q_OS_ANDROID)
    if(!requestAndroidPermissions())
        return -1;
#endif
.....
}

[krokstr]

@J-Hilk , Thanks for the fast answer and provided code.

Just made few tries of calling the function at different places of the code, It keeps exiting with 0.
If I understand right, this code is supposed to show user dialogues asking for permissions the app needs?

I am testing it on Galaxy A8(2018) Android 8.0.0.

[J.Hilk]

@krokstr
did you also add that permissions to your android manifest ? AFAIK they also need to be in there, for you to be able to request them on runtime.

[krokstr]

@J-Hilk ,
Ok, they are now added. Both permissions for bluetooth and coarse location. Now the functions does not exit with 1. But It's not asking for the permissions (which I need to do (do I really need it?)) and it's not exiting with 0, when I manually turn off the only visible permission which is Location. The purpose of that function is to show dialogue, isn't it?

[J.Hilk]

@krokstr what is your target SDK(API) version?
the sdk needs to be set to one that supports runtime permission checks.
24 I think is where that started.

[krokstr]

@J-Hilk
Thanks for the help, when I changed the Target SDK to API 26, everything came in place.
Now the forum is having complete guide on how to start android runtime permissions step by step :D