Game Development Reference
In-Depth Information
Figure 4-2.
Our test starter activity, which looks fancy but doesn't do a lot yet
Now let's make something happen when a list item is touched. We want to start the respective
activity that is represented by the list item we touched.
Starting Activities Programmatically
The
ListActivity
class has a protected method called
onListItemClick()
that will be called
when an item is tapped. All we need to do is override that method in our
AndroidBasicsStarter
class. And that's exactly what we did in Listing 4-1.
The arguments to this method are the
ListView
that the
ListActivity
uses to display the items,
the
View
that got touched and that's contained in that
ListView
, the position of the touched
item in the list, and an ID, which doesn't interest us all that much. All we really care about is the
position
argument.
The
onListItemClicked()
method starts off by being a good citizen and calls the base class
method first. This is always a good thing to do if we override methods of an activity. Next, we
fetch the class name from the
tests
array, based on the
position
argument. That's the first
piece of the puzzle.
Earlier, we discussed that we can start activities that we defined in the manifest file
programmatically via an intent. The
Intent
class has a nice and simple constructor to do this,
