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.