This code is from \samples\android-8\ApiDemos\. This is example of
ExpandableList. But here when the list item is expanded it's hard to
visually distinguish where the child item ends and next group item
begins. So what I want is give different color to child and icon in
front of both child and group.
public class ExpandableList1 extends ExpandableListActivity {
private int mGroupIdColumnIndex;
private String mPhoneNumberProjection[] = new String[] {
People.Phones._ID, People.Phones.NUMBER
};
private ExpandableListAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Query for people
Cursor groupCursor = managedQuery(People.CONTENT_URI,
new String[] {People._ID, People.NAME}, null, null,
null);
// Cache the ID column index
mGroupIdColumnIndex =
groupCursor.getColumnIndexOrThrow(People._ID);
// Set up our adapter
mAdapter = new MyExpandableListAdapter(groupCursor,
this,
android.R.layout.simple_expandable_list_item_1,
android.R.layout.simple_expandable_list_item_1,
new String[] {People.NAME}, // Name for group layouts
new int[] {android.R.id.text1},
new String[] {People.NUMBER}, // Number for child
layouts
new int[] {android.R.id.text1});
setListAdapter(mAdapter);
}
public class MyExpandableListAdapter extends
SimpleCursorTreeAdapter {
public MyExpandableListAdapter(Cursor cursor, Context context,
int groupLayout,
int childLayout, String[] groupFrom, int[] groupTo,
String[] childrenFrom,
int[] childrenTo) {
super(context, cursor, groupLayout, groupFrom, groupTo,
childLayout, childrenFrom,
childrenTo);
}
@Override
protected Cursor getChildrenCursor(Cursor groupCursor) {
// Given the group, we return a cursor for all the
children within that group
// Return a cursor that points to this contact's phone
numbers
Uri.Builder builder = People.CONTENT_URI.buildUpon();
ContentUris.appendId(builder,
groupCursor.getLong(mGroupIdColumnIndex));
builder.appendEncodedPath(People.Phones.CONTENT_DIRECTORY);
Uri phoneNumbersUri = builder.build();
// The returned Cursor MUST be managed by us, so we use
Activity's helper
// functionality to manage it for us.
return managedQuery(phoneNumbersUri,
mPhoneNumberProjection, null, null, null);
}
}
}
How to do this? Thanks
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