title: How should I pass around singleton objects to Android activities?
body: <p>I'm developing an Android app that uses two singleton objects: one for business logic (similar to the model in MVC) and one for a Bluetooth connection. Some activities display data and need access to the former, while one lets the user connect/disconnect and needs access to the latter.</p>
  
  <p>What is the preferred way of passing these objects around? Arguments to the activities? Global objects? </p>