Go to Package Explorer -> Right click your Android project ->Run As->Run Configurations.
Under Android Application on the left column, select your project -> on the right column, where you see Android | Target | Common tabs ->
Select Target -> on the bottom “Additional Emulator Command Line Options”->
-http-proxy http://wwwgateProxy.com:1080 -debug-proxy http://wwwgateProxy.com:1080
->Run/Close.