Should I create an activity for each screen?

Question

I will start with an example... If you go to Settings > Applications > Manage applications, a new screen will open with a list of the installed applications: if you click on any application of the list, it will open a new screen containing information about the application.

Well, some settings of my application must be managed through a list, and this list should behave like the above example. I have already created a PreferenceActivity with some categories, each of which has some items: when I click on one of these items, I would like it to open a new screen where the new data is placed on a list, just like the list of the applications of the above example. Moreover, when I click on any entry of this list, it will open a new screen in order to set some data.

How should I proceed? Should I create an activity for each screen?

Answer 1

Android was created this way, according to the documentation "An activity is a single, focused thing that the user can do.", so yes, you should have an activity for each screen. This changed a little with Honeycomb with the introduction of Fragments, but if you're not developing for tablets you should keep the one page, one activity mindset on Android.