I know this question has been answered multiple times but being new to Android I still can't understand the answers given. In this question for instance: How to use an Android Handler to update a TextView in the UI Thread? and then there is this question where the answer is very unclear too: Using Data API changes to update watch face UI.
I have a MainActivity.class that has a RadioButton that shows whether the phone is currently acquiring data from Android Wear's sensors. The Service that starts acquiring data is named MyService and extends WearableListenerService. All I need to do is set the RadioButton to true or false depending on the value of the boolean that I'm controlling in MyService.class.