If you are using a 64-bit distribution on your development machine, you need to install the ia32-libs package using apt-get ::
Open a terminal and enter the following
sudo apt-get install ia32-libs
For more information check the link below.
http://developer.android.com/sdk/installing/index.html
I assume Android-sdk is 32 bit, so you need ia32-libs if you are running on a 64 bit machine
Edit:
You can try this
open terminal
and enter
sudo chmod -R 777 'YOURPATH of sdk folder(Just Drag and Drop your Android sdk folder here)'
This will give read permission and read execution.
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