I cannot see Android SDK section in Android Studio preferences! This is the preferences which i see:
Can any one say how can i enable android SDK in preferences? It should be some thing like this:
Edit: Some cashed data causes this problem and even invalidate cashes not worked for this problem. So Uninstall android studio (with it's data) completely and install it again works successfully.
I found the answer. Once I uninstalled the android studio and installed it again but it doesn't works. Then again I uninstalled the android studio and it cashes completely according to this post and installed it again. So it works and show Android SDK.