Taking a screen shot of your Android app with Eclipse is very easy, in
Devices view, select the Screen Capture tool from the toolbar with an
Android device or emulator selected. After that you could: Refresh to update
the view, Rotate, Save the screen shot or Copy the image to the
clipboard.
If you don’t have the Device view opened, you could open it from Window > Show View > Other ... menu option, in the new window you could type Devices
in the search field to filter the views or open Android folder and select
Devices option.