QProcess emits readyRead too late!

[A Former User]

Hi,

I wrote an appliaction for Android Debug Bridge (adb) to backup app data from an android device. But QProcess doesn't emit readRead signal, although adb gives an output:

QProcess *process is global in the class!

process = new QProcess(this);
connect(process, SIGNAL(readyRead()), this, SLOT(readyRead()));
connect(process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(finished(int, QProcess::ExitStatus)));

process->start("adb", QStringList() << "blah", QProcess::ReadOnly);

(...)

void Class::readyRead() {
        qDebug() << "Class::readyRead()";
}

In terminal the message is coming, than i confirm it on the device and than it's done. In QProcess the readRead signal is emitted after confirming on device! Why?

[SGaist]

Hi,

Shouldn't you rather use readyReadStandardOutput and/or readyReadStandardError ?

[A Former User]

Unfortunately, it's the same!

[jalomic]

@dynup I think data is buffered

Try to use process->start("adb", QStringList() << "blah", QProcess::ReadOnly | QIODevice::Text);

or

Try to use process->start("adb", QStringList() << "blah", QProcess::ReadOnly | QIODevice::Text | QIODevice::Unbuffered);

[A Former User]

Good idea, thanks! ...but doesn't work.