(1. Let's start with HelloWorld of Widgets again -- this article gives you the most intuitive example with a simple and practical example. 2. Introduction to widgets and AppWidgetframework - This article introduces widgets and their related AppWidgetframework to let you know how widgets are. 3. Widget Design Guides -- This article tells you how to design friendly and beautiful widgets, and where to put them. 4. System Clock Invoked by AppWidget -- This chapter tells you how to update widgets on time and how to call system resources by invoking the system clock. 5. Let our widgets interact with the service -- This article will tell you how to make widgets interact with the service we define through a practical example. 6. The word "Daily" in the wiki dictionary teaches you how to deal with the web service -- this article introduces how to deal with the web service and how to retrieve the required resources from the Internet and use them in the widget. 7. Android Widgets have unlimited potential -- This article tells you which types of widgets from a foreigner's point of view, and they are willing to pay for them.
(First Edition) [eoeAndroid Special Issue] Issue 4: Android widget.pdf)