title: saving an object for an app in android, or whether that is even the right approach
body: <p>So, I've got some <em>very</em> minor experience in Java, and I'm trying to learn/work on an android project. The issue I'm having is wrapping my head around saving/retrieving user data.</p>
  
  <p>Its a simple marking app(its mostly for myself) but basically there is a semester object, which contains classes objects, which contains markable objects (i.e tests each with their own weightage).</p>
  
  <p>So basically what I'm asking is how would I go about retrieving data.. What I really want is to display "Oh hey, this is your mark for the current semester:" when you open up the main activity/start the app (which would involve loading up the semester object which the user has entered their data into and calling up a method), but I don't know how I would open/save the objects each time the app is opened and closed. </p>
  
  <p>Would I implement serialization in the semester class,  or would I save/open up the object whenever I close/open the app. Is saving the semester object even the right approach? </p>
  
  <p>I've been searching for a while and I've seen questions about people opening files and I'm pretty lost right now. </p>
  
  <p>(Oh and while I'm on the topic of this project, is the idea of nesting objects a bad approach? Like having a semester object which contains multiple class objects, each which contains multiple markable objects)</p>