The document discusses ListView and AdapterView in Android. It notes that ListView derives from AdapterView, which are views that use adapters. It lists subclasses of AdapterView like AdapterViewFlipper and GridView. It then focuses on ListView and how to add event handling through an onItemClickListener, providing an example of setting one on a ListView to react to clicks and display a Toast with the item position.

1. Prof. Neeraj Bhargava
Vishal Dutt
Department of Computer Science, School of
Engineering & System Sciences
MDS University, Ajmer

2. AdapterView
 ListView derives from AdapterView
 AdapterViews are Views that use Adapters.
 There are several other AdapterView subclasses that
behave much like ListView.

3. Subclasses of AdapterView
1. AdapterViewFlipper
2. GridView
3. Spinner
4. Gallery
5. StackView
6. ExpandableListView

4. Back to ListView
 How to add event handling?

5. Adding Click Handler
 To react to clicks in the list, set an onItemClickListener
on your ListView.

6. onItemClickListener Example
// Assign adapter to ListView
listView.setAdapter(adapter);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(),
"Click ListItem Number " + position, Toast.LENGTH_LONG)
.show();
}
});

7. onItemClick Parameters
parent The AdapterView where the click
happened.
view The view within the AdapterView that
was clicked (this will be a view provided
by the adapter)
position The position of the view in the adapter.
id The row id of the item that was clicked.
onItemClick(AdapterView<?> parent, View view, int position, long id)

8. onItemClickListener Example
// Assign adapter to ListView
listView.setAdapter(adapter);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(),
"Click ListItem Number " + position, Toast.LENGTH_LONG)
.show();
}
});

9. OnItemClickListener Result

10. Questions
 Explain Event Handling in Android?
 How will you creat onItemClick Listner in List View?