What methods are used to transfer information when transitioning between screens in an application?

In Android, there are several main methods for passing information between screens (Activity or Fragment):

1. Intent Extras — when launching a new Activity via Intent, data can be put in as key-value pairs:

Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("key", "value");
startActivity(intent);

In the second Activity, data is retrieved:

String value = getIntent().getStringExtra("key");

2. Bundle — used for passing data between Fragments:

Bundle bundle = new Bundle();
bundle.putString("key", "value");
Fragment fragment = new MyFragment();
fragment.setArguments(bundle);

3. Shared ViewModel — when using MVVM architecture, a shared ViewModel can be used for data exchange between fragments.

4. Saving in shared storage — for example, SharedPreferences, database, or singletons, but this is less preferred for temporary data transfer.

Thus, the choice of method depends on the context and architecture of the application.