Hi I am a Qt developer but never done any mobile device app.

I do the coding on windows xp, My question is

1. how do I make my qt app work in maemo?
2. i have n900 at my hand, i know the app manager in n900 will connect to repository somewhere in this website. if I have a app, how can i upload to the repository? any special requirment needed?

3. if i want to test the app on the device, how do i get the app onto device? through repository?

thanks very much. i would love to start to learn how to develop the apps for maeno, please show me some lights

There are various threads in this board discussing developing for Maemo5.
Just check the developing section

1:
Basically, you need maemo 5 sdk.
If your app only use Qt API, then a simple qmake && make will built it for maemo.

2:
You can build your app in deb, and simply install it on the device
If you'll like to upload the EXTRA repository, you'll need to have a garage account, an approved garage project (wont be hard to start) and you'll be able to upload.
Again: read the manual! there are plenty of resources in this forum and the maemo wiki, If you cant find an answer, you are welcome to ask.

3:
Testing the app in the device shouldnt be hard, you dont even have to build a package or upload anything.
I think esbox can make it even easier.
Bear in mind that you can actually test the application in the SDK without the device.

As a personal suggestion: Although It's possible to develop for maemo5 in Windows, It's better to switch completely to Linux (Ubuntu or Debian). Trust me, the more you use Linux, the better you'll understand maemo.

Goodluck

For development in windows you can give a try to MADDE: http://wiki.maemo.org/MADDE

General info about Qt in Maemo: http://wiki.maemo.org/Qt

If you still have problems/doubts feel free to ask.

I am downloading virtual image for maemo. Is that be able to simulate the unix enviremenmt?