I made my Android app looks like iPhone app. See the image below.

iPhone UI on Android

QSlider and UISwitch

This is how to write Qt stylesheet code to make QSlider just like iPhone UISwitch on/off toggle button.

1. In QDesigner, drag QSlider into your form.
2. Modify properties. Make “minimum” to be “0″, “maximum” to be “1″, “orientation” to be “Horizontal”, etc.
3. Insert following code into the stylesheet field.


QSlider {
min-width:80px;
min-height:27px;
max-width:80px;
max-height:27px;
}
QSlider::groove:horizontal {
background-image: url(:/images/slider_bg.png);
background-repeat: no-repeat;
background-position:center;
margin:0px;
border:0px;
padding:0px;
}

QSlider::sub-page:horizontal {
background-image: url(:/images/slider_on.png);
background-repeat: no-repeat;
background-position:left;
background-origin:content;
margin:0px;
border:0px;
padding-left:0px;
}

QSlider::add-page:horizontal {
background-image: url(:/images/slider_off.png);
background-repeat: no-repeat;
background-position:right;
background-origin:content;
margin:0px;
border:0px;
padding-right:0px;
}

QSlider::handle:horizontal {
background-image: url(:/images/slider_handle.png);
width:39px;
height:27px;
margin:0px;
border:0px;
padding:0px;
}

QSlider::sub-page:horizontal:disabled {
background-image: url(:/images/slider_on_disabled.png);
background-repeat: no-repeat;
background-position:left;
background-origin:content;
margin:0px;
border:0px;
padding-left:0px;
}

QSlider::add-page:horizontal:disabled {
background-image: url(:/images/slider_off_disabled.png);
background-repeat: no-repeat;
background-position:right;
background-origin:content;
margin:0px;
border:0px;
padding-right:0px;
}

QSlider::handle:horizontal:disabled {
background-image: url(:/images/slider_handle.png);
width:39px;
height:27px;
margin:0px;
border:0px;
padding:0px;
}

4. Create your own png files like following images.

slider_bg.png

 

slider_on.png

 

slider_off.png

 

slider_handle.png

 

5. Done.

Today I wrote a code to remove a directory and all its sub-directories and files.


bool MyUtil::removeDir(const QString& dirName)
{
    bool result = true;
    QDir dir(dirName);

    if (dir.exists(dirName))
    {
        Q_FOREACH(QFileInfo info, dir.entryInfoList(QDir::NoDotAndDotDot|QDir::AllDirs|QDir::Files, QDir::DirsFirst))
        {
            if (info.isDir())
                result = removeDir(info.absoluteFilePath());
            else
                result = QFile::remove(info.absoluteFilePath());

            if (!result)
                return result;
        }
        result = dir.rmdir(dirName);
    }
    else
    {
        QFile file(dirName);
        if (file.exists())
            result = file.remove();
    }

    return result;
}//removeDir()

Very good script that will checkout codes and compile libraries. Nice!

http://csbarn.blogspot.com/2011/02/how-to-compile-ffmpegx264-for-windows.html

After spending several hours debugging, I finally figure out how to solve the crash in my native code while calling pthread_exit(). The log showed “thread exiting, not yet detached (count=0)“.

Scenario:

I have an Android java code which will call my JNI (NDK) native code. In my native code, I create a pthread and in my pthread loop, I called AttachCurrentThread() to the JVM in the beginning of the loop.

When my java code finish some jobs, I need to stop the pthread and it crashed at the end of pthread loop.

Solution:

So, before I exit my pthread loop (before calling pthread_exit), I need to make sure I do call DetachCurrentThread from JVM.