QUOTE(phantz @ May 6 2012, 04:10 PM)
I have already install all of it all but adb devices in command prompt window didnt show up any serial number

Read this: (If you are using Windows)
I guess YOU NEED TO READ STEP 4!Step 1Make sure that the required drivers for your android device are properly installed on your PC.
Step 2Download and install the Android SDK
Step 3For adb to work on version 8 of the SDK Starter package we have to add Platform Tools part to the SDK. Below are the steps:
1. Open root directory of the SDK (for e.g. if you’ve installed or extracted it on:/ then go to this address “C:\Program Files\android-sdk-windows”
2. Find “SDK Manager” and double-click on it to execute.
3. It will check for updates on the Android website, and a pop up window will appear showing a list of available downloads. Just add the “Android SDK Platform Tools” and reject everything else
Step 4Add Path variable to avoid long lines of commands every time you want to run adb. Below are the steps:
1. Right-click on “My Computer” and select “Properties”. Now under the “Advanced Tab” select “Enviroment Variables”
2. Scroll and find the “Path” variable from the list. Double-click on it to edit it.
3. Now add the full path of the “tools” and “platform-tools” folders of the SDK to your path. For e.g. on my computer, I had it installed in — C Drive – Program Files – Android – android-sdk. So, I put this in the Path (don’t put any space on either side of the semi-colon mark [;] which separates the pat of ‘tools’ folder and ‘platform-tools’ folder) – “C:\Program Files\Android\android-sdk\tools;C:\Program Files\Android\android-sdk\platform-tools”
Step 5On your Android device go to Settings->Applications->Development and make sure that “USB Debugging” is ticked. It’s essential for ADB to work!
Now plug your phone into your PC (using original cable that’s supplied by your manufacturer is recommended when working with ADB). If a window pops up saying “installing drivers” then wait for it to complete installation
Step 6Open command prompt from the menus, or Open “Run > and type cmd” to execute Command Prompt
Now insert the following code:
CODE
C:\> adb devices
This should display something like the following :
CODE
List of devices attached
XXX12345 device
If you can see your device in the list then congratulations! You’ve done well. You are now good to start using adb. Enjoy!
If it’s NOT appearing in the list make sure that drivers are properly installed and you’ve enabled “USB Debugging” as told in Step 5.
This post has been edited by droid13579: May 6 2012, 04:18 PM