Just come across a Russian traffic app. They are really good. The communist Russia may have missed the automobile and electronic revolution, but they certain are prepared for the information app revolution. Too bad the traffic is only for Russia cities.
The other app is from an individual who I respect greatly. His app is simple, clean and essential.
To make a traffic map widget, one possible way is
1. Get google map API js on android app.
2. Save it into a image file.
3. Display on the widget.
4. Each time user tabs refresh, activate the main app in the background to get the current google map with traffic layer and save it as an image file again.
5. What is the latest widget abilities?