The emulator lets you see how your application will look, behave, and interact, but to really see what's happening under the surface you need the Dalvik Debug Monitoring Service. The DDMS is a powerful debugging tool that lets you interrogate active processes, view the stack and heap, watch and pause active threads, and explore the file system of any connected Android device.
The DDMS perspective in Eclipse also provides simplified access to screen captures of the emulator and the logs generated by LogCat.
If you're using the ADT plug-in, the DDMS is fully integrated into Eclipse and is available from the DDMS perspective. If you aren't using the plug-in or Eclipse, you can run DDMS from the command line and it will automatically connect to any running device or emulator.
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Quick start guide to skyrocket your offline and online business success with mobile apps. If you know anything about mobile devices, you’ve probably heard that famous phrase coined by one of the mobile device’s most prolific creators proclaiming that there’s an app for pretty much everything.