Screen capture for Android

Liorm

Hi everyone

I need to screen capture on Android. I've tried grabWindow:

      QPixmap desk = g_app->screens().at(0)->grabWindow( QDesktopWidget().winId() );
      bool x = desk.save(path3.append("/screenshot.PNG"));

but x returned false. i tried to see QPixmap size:

      QByteArray bytes;
      QBuffer buffer(&bytes);
      buffer.open(QIODevice::WriteOnly);
      desk.save(&buffer, "PNG");
      qDebug() << "len " << buffer.size();

the output was len 0

any ideas?

alternatively, any Android class I can use using JNI or something similar?

thanks SO much for any help
Lior

SGaist

Hi and welcome to devnet,

What is the exact path you used to save the file ?

Liorm

@Liorm said in Screen capture for Android:

hi and thanks
this is the path
QString path3 = QStandardPaths::writableLocation(QStandardPaths::DownloadLocation);

which is evaluated to '/storage/emulated/0/Download'

but the main point is that the QPixmap is empty... buffer.size is 0

is grabWindow known to work in Android? i see conflicting reports

thanks!

raven-worx

@Liorm said in Screen capture for Android:

I need to screen capture on Android. I've tried grabWindow:

of a QWidget or QML application?

SGaist

QDesktopWidget().winId() that's wrong.

Take a look at the QDesktopWidget documentation on how to properly get a QDesktopWidget object.

Note that I'm not sure what the result is on Android.