DefaultCaller

It’s important that your activity maintains the state a user expects, even as it is rotated, shut down by the system or restarted by the user. As I just mentioned, it’s also important that you don’t clog up onSaveInstanceState with complex objects. You also don’t want to reload data from the database when you don’t need to. Let’s look at an example of an activity that allows you to search through your library of songs: