If you are a fan of Qt and don’t want to change to another IDE for developing Android apps then this post is for you.
Follow the steps below to have Qt for Android installed in your computer.
How to install Qt for Android
Image Transformer (Fourier Transform App for Android)
UPDATE: This application is updated. Please read this post for more information.
My new application is a tool for for performing Fourier transformation on images. You can then apply masks to the Fourier representation of image and revert back (perform Inverse Fourier Transform) to see how the image gets affected.
For more information about Fourier Transform you can check out this link.
It is built using OpenCV and Qt and it is programmed completely in C++. I hope it would be useful for Image Processing and Machine Vision enthusiasts, researchers and students. It also contains some useful tips and tricks for programming Android applications using Qt and OpenCV such as:
- How to open Android image gallery in Qt (Default interface)
- How to capture images using default Android camera interface
- How to crop images displayed on a QLabel
- etc.
Source code (any part of it actually 🙂 ) is available upon request. Please send your requests using the Contact Me page.
Please consider supporting this application by giving a decent rating in Google Play.
For an example of Fourier transform using OpenCV please check out this link.
You can also see this link for more information about Fourier transform.
You can download this application from Google Play using the link below:
https://play.google.com/store/apps/details?id=com.amahta.ImageTransformer
Access Parent Class in Java (and obviously Android)
I use this method for having simple access to a parent class’ functions in Java. Please note that this is not a recommended method but in case of programs with not much lines of code it becomes really helpful and easy to implement.
Continue reading “Access Parent Class in Java (and obviously Android)”OpenCV + Qt + Android, Adding Required Libraries and Includes
Another note to myself which I hope will be useful for others searching it.
Add the following lines to your PRO file in Qt, or create a PRI file using the following and include that in your PRO file.
Continue reading “OpenCV + Qt + Android, Adding Required Libraries and Includes”Extending your Qt Android application using JNI
Following slides contain valuable information on Qt, Android and JNI that were presented during Qt Developer Days 2014.
How to call a Java function using C++ (Qt) and how to call-back a C++ (Qt) function using Java are described here.
Extending your Qt Android application using JNI
They’re originally taken from http://www.qtdeveloperdays.com