I'm new to widget development, so I have some questions that I would like to have answered, if possible...
1. In the examples provided, Flickr and Twitter, the respective APIs are used. Those APIs came from where? I mean, where they developed just for the use of widgets, or they already existed? If so, which more APIs exist that we can use and how can we find them?
2. Is it possible for a widget to use some kind of database? As I understood of what I've read, it's possible through a request to a remote server that holds the db right? Can someone give me a simple description on how to do something like this?
3. What can I do with the webKit library? Is there any documentation on it?
4. Is it possible to interact with mobile phone data, like send a text message or get information on contacts?
Thanks on advance for any reply and sorry for my english. ;)