An adapter is used to connect data from a data source to views in an AdapterView like a ListView. The adapter provides the views for each item in the data set by inflating a layout. To create a list with images, you make a custom ArrayAdapter subclass that overrides getView() to set the text and image for each item based on its name. You provide layout XML for each list item and start a ListActivity to display the list.

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document of baabtra –Mentoring Partner
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3. LIST ADAPTER WITH MULTIPLE
OBJECTS
• FREDDY PV
email/facebook id : f4freddy@gmail.com

4. What is an adapter in android?
• An Adapter object acts as a bridge between an
AdapterView and the underlying data for that
view.
• The Adapter provides access to the data
items.
• The Adapter is also responsible for making a
View for each item in the data set.

5. What is AdapterView Class?
• The AdapterView is a child class of ViewGroup> A
special kind of container of view objects (list
items)
• Typically you are going to use subsclasses of
AdapterView class instead of using it directly
• Example subclasses of AdapterView class>
ListView> Spinner> Gallery
• An AdapterView access the data through Adapter
object Instead of accessing data directly itself

6. ListView
• ListView is a view group that displays a list of
scrollable items. The list items are
automatically inserted to the list using an
Adapter that pulls content from a source such
as an array or database query and converts
each item result into a view that's placed into
the list.

7. First create a class for listactivity
public class ListMobileActivity extends ListActivity {
static final String[] name = new String[] { "freddy", "jaison",
"kiran", "syam"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setListAdapter(new ArrayAdapter<String>(this, R.layout.list_mobile,
// R.id.label, MOBILE_OS));
setListAdapter(new MobileArrayAdapter(this, name));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
//get selected items
String selectedValue = (String) getListAdapter().getItem(position);
Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();
}
}

8. Then create a class for the
arrayadapter
public class MobileArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public MobileArrayAdapter(Context context, String[] values) {
super(context, R.layout.list_name, values);
this.context = context;
this.values = values;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.list_name, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.label);
ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
textView.setText(values[position]);
// Change icon based on name
String s = values[position];
System.out.println(s);
if (s.equals("freddy")) {
imageView.setImageResource(R.drawable.freddy_image);
} else if (s.equals("jaison")) {
imageView.setImageResource(R.drawable.jaison_image);
} else if (s.equals("kiran")) {
imageView.setImageResource(R.drawable.kiran_image);
} else {
imageView.setImageResource(R.drawable.syam_imge);
}
return rowView;
}}

9. Then create an xml file to view this
list
•
• <?xml version="1.0" encoding="utf-8"?>
• <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
• android:layout_width="wrap_content"
• android:layout_height="wrap_content"
• android:padding="5dp" >
•
• <ImageView
• android:id="@+id/logo"
• android:layout_width="50px"
• android:layout_height="50px"
• android:layout_marginLeft="5px"
• android:layout_marginRight="20px"
• android:layout_marginTop="5px"
• android:src="@drawable/windowsmobile_logo" >
• </ImageView>
•
• <TextView
• android:id="@+id/label"
• android:layout_width="wrap_content"
• android:layout_height="wrap_content"
• android:text="@+id/label"
• android:textSize="30px" >
• </TextView>
•
• </LinearLayout>
•

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