How to get a screenshot in Android?

[Mikeeeeee]

Hi!
How to get a screenshot in Android?

[mrjj]

Hi
of your own app ?
or of whole "Desktop" / other app.

[Mikeeeeee]

I will be satisfied with any screenshot, application or desktop. My application on QML.

[Mikeeeeee]

I use QQmlApplicationEngine

[KroMignon]

@mikeeeeee I would to it like this:

QQuickWindow* currentWindow = qobject_cast<QQuickWindow*>(QGuiApplication::focusWindow());
if(!currentWindow)
    return;
QScreen* screen = currentWindow->screen();
if(!screen)
    return;
QRect screenGeometry = fullScreen ? screen->geometry() : currentWindow->geometry();
auto pm = screen->grabWindow(0, screenGeometry.x(), screenGeometry.y(), screenGeometry.width(), screenGeometry.height());

QByteArray bArray;
QBuffer buffer(&bArray);
buffer.open(QIODevice::WriteOnly);
pm.save(&buffer, "PNG");

[Mikeeeeee]

I get error:use of undeclared identifier 'fullScreen'

[KroMignon]

This post is deleted!

[Mikeeeeee]

This piece of code doesn't work either. I put in my code that converts QScreen to QByteArray. QByteArray is empty.

QQuickWindow* currentWindow = qobject_cast<QQuickWindow*>(QGuiApplication::focusWindow());
//    if(!currentWindow)
//        return;
     QScreen* screen = currentWindow->screen();

[Mikeeeeee]

This all code

QQuickWindow* currentWindow = qobject_cast<QQuickWindow*>(QGuiApplication::focusWindow());

// if(!currentWindow)
// return;
QScreen* screen = currentWindow->screen();
// if(!screen)
// return;
//QRect screenGeometry = fullScreen ? screen->geometry() : currentWindow->geometry();
/* QRect screenGeometry = fullScreen ? screen->geometry() : currentWindow->geometry();
auto pm = screen->grabWindow(0, screenGeometry.x(), screenGeometry.y(), screenGeometry.width(), screenGeometry.height());

QByteArray bArray;
QBuffer buffer(&bArray);
buffer.open(QIODevice::WriteOnly);
pm.save(&buffer, "PNG");*/



QImage myScreen;
//QPixmap pic = QPixmap::grabWindow(QWidget::winId(),0,0,50,50);
//qDebug()<<QWidget::winId();

// QScreen *screen = QGuiApplication::primaryScreen();
QPixmap pixamp;
pixamp = screen->grabWindow(0);
myScreen = pixamp.toImage();
//myScreen = QPixmap::grabWindow();
//myScreen = quickView->grabWindow();
//myScreen.save("C:\Users\New Owner\Downloads\i.png");
QByteArray bArray;
QBuffer buffer(&bArray);
buffer.open(QIODevice::WriteOnly);
//myScreen.save(&buffer, "JPEG");
//QString image("data:image/jpg;base64,");
myScreen.save(&buffer, "PNG");
QString image("data:image/png;base64,");
image.append(QString::fromLatin1(bArray.toBase64().data()));
qDebug()<<"screenShot:"<<image;
return image;

[Mikeeeeee]

Maybe you can use it?

foreach(QObject* obj, engine.rootObjects()) {
QQuickWindow* window = qobject_cast<QQuickWindow*>(obj);
if (window) {
QImage image = window->grabWindow();
qDebug() << image;
}
}

[mrjj]

is the image valid then ?
like
qDebug() << image.isNull();
says false ?

[Mikeeeeee]

qDebug()<<"screenShot:"<<image;
return:
"screenShot: "data:image/png;base64,""

[Mikeeeeee]

@mrjj said in How to get a screenshot in Android?:

qDebug() << image.isNull();

qDebug() <<"image.isNull() :" << image.isNull();
return:
image.isNull() : false

[mrjj]

@mikeeeeee
Ok, that means its does grab something :)

[Mikeeeeee]

But how to get a picture out of it?

[mrjj]

@mikeeeeee
Cant you just save it ?
https://doc.qt.io/qt-5/qimage.html#save

[Mikeeeeee]

We've made a mistake. I immediately ask the text QString image("data:image/png;base64,"); And so, pictures of the there is no. Need another code.

[Mikeeeeee]

qDebug() <<"image.isNull() :" << image.isNull()<<"screen->size() :"<<screen->size();
return
image.isNull() : false screen->size() : QSize(360, 640)

[mrjj]

@mikeeeeee
Im really not sure what you are saying. :)
That code work for others it seemed
https://stackoverflow.com/questions/21697185/how-to-take-screenshot-of-qml-application-without-qquickview/38501975

What Qt version are you using?

[Mikeeeeee]

Could the screen be incorrectly processed?