http://developer.android.com/guide/topics/appwidgets/index.html

http://developer.android.com/guide/practices/ui_guidelines/widget_design.html

Hello, Android p. 217

1. create a new android project with no activity
2. create a receiver in AndroidManifest.xml
3. create widget definition in res/xml/widget.xml
   • http://developer.android.com/reference/android/appwidget/AppWidgetProviderInfo.html
4. create the layout for the widget in res/layout
5. create the widget class, extending android.appwidget.AppWidgetProvider