/** Helper Method to create Demo Groups and Children */
private void initDemoData() {
this.groups = new ArrayList<GroupClass>();
for (int groupCounter = 1; groupCounter <= 25; groupCounter++) {
GroupClass group = new GroupClass("Group " + groupCounter);
// Just a little trick to get a different number of children per group
int numberOfChildren = (23 % groupCounter) + 2;
for (int childCounter = 0; childCounter < numberOfChildren; childCounter++) {
ChildClass child =
new ChildClass(
"Child " + childCounter,
"Text for Child "
+ childCounter
+ " Text for Child "
+ childCounter
+ " Text for Child "
+ childCounter
+ " Text for Child "
+ childCounter
+ " Text for Child "
+ childCounter);
group.addChild(child);
}
this.groups.add(group);
}
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
if (item.getItemId() == R.id.add_item) {
GroupClass newGroup = new GroupClass("New Group " + System.currentTimeMillis());
newGroup.addChild(new ChildClass("New Child", "Child Text: " + System.currentTimeMillis()));
this.groups.add(0, newGroup);
this.adapter.notifyDataSetChanged();
return true;
} else if (item.getItemId() == R.id.remove_item) {
this.groups.remove(0);
this.adapter.notifyDataSetChanged();
return true;
} else {
return super.onMenuItemSelected(featureId, item);
}
}
@Override
public View getGroupView(
int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
ViewGroup item;
if (convertView != null && convertView.getId() == R.id.group_item) {
// We can reuse the View
item = (ViewGroup) convertView;
} else {
// We create a new View
item = (ViewGroup) inflater.inflate(R.layout.group_item_layout, parent, false);
}
GroupClass group = (GroupClass) getGroup(groupPosition);
TextView nameView = (TextView) item.findViewById(R.id.group_name);
nameView.setText(group.getName());
TextView sizeView = (TextView) item.findViewById(R.id.group_size);
sizeView.setText("" + group.getChildren().size());
return item;
}