Free Auto generate android&Java Class Diagram (UML) on Eclipse
This plugin will automatically create Class Diagram you can move class or path by your self.
You can also customize to hide some attribute e.g. private variable,inner class,static variable etc.
The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE. It shows your Java source code and libraries in live UML class and sequence diagrams that automatically update as your code changes. The image below is a class diagram of actual source code; click on it to see the editor in the Eclipse Java Perspective.