Auto update android sdk with authentication proxy

update_android_sdk.sh

#!/bin/bash
export PATH=$PATH:${ANDROID_SDK_PATH}/tools

USER="your proxy-user"
PASS="your proxy-password "
PROXY_HOST="your proxy-host"
PROXY_PORT="your proxy-port"

expect -c "
spawn android update sdk -u -s --proxy-host ${PROXY_HOST} --proxy-port ${PROXY_PORT} 

while {1} {
    expect {
        \"Login:\" {
                send   \"${USER}\r\"
        }
        \"Password:\" {
                 send   \"${PASS}\r\"
        }       
        \"Workstation:\" {
                 send   \"\r\"
        }
        \"Domain:\" {
                 send   \"\r\"
        }
        \"Done.\" {
                exit
        }
    } 
}
"