We are using eclipse luna 4.4.1, adb is installed on linux system to test android app. I followed below steps:
This can be caused by several issues:
Port forwarding between your host maschine and emulator is not configured (read more on that). Run following command in order to fix that:
adb forward tcp:[PORT_NUMBER_IN_USE] tcp:[PORT_NUMBER_IN_USE]
The path to Android SDK in MonkeyTalk preferences is not set up correctly. You have to first install Android SDK and then specify path to it in MonkeyTalk. You should probably also check “Include Android Testing?” checkbox.
This tutorial for setting up Android agent in MonkeyTalk can also be useful to you.