I re-installed my Windows. Every thing was neat and clean. But when I came back to Eclipse to play with Android development. I found my Samsung Galaxy Ace Android phone is not getting detected. Holy crap happened.
When I started Delvik Debug Monitor, it was unable to show me my phone. I verified that I have USB debugging enabled (Settings > Applications > Development > USB debugging) . And also I manually killed the adb and start it. But it was not listing my device.
adb kill-server adb devices * daemon not running. starting it now on port 5037 * * daemon started successfully * List of devices attached
I was thinking some thing happened wrong with SDK while re-installing the operating system. I spent whole day in figuring out the issue. For this I even re-installed the SDK. Even I have seen Google USB driver has also been installed. But that would not help.
The issue was missing Samsung Galaxy Ace device drivers on Windows. That we can get while installing Samsung Kies.
After installing Kies, I can see my phone my phone in Delvik Debug Monitor. Ahh relief. So if you guys got the same trouble, must check the device drivers of your Android phone. I missed an obvious thing.