Get list count then update header in listview

[Android Beginner]

I have 2 xml files

`Header` and `Section`

then i use some condition to segregate those two and the output of that is this


|8/2/2018|
----------
Data 1
Data 2
|8/2/2018|
----------
Data 1
Data 2
Data 3

It is a listview that groups data with same date and the 1 date header for them.
My question is how can I count each data then update the header? like this

|8/2/2018 (2)|
----------
Data 1
Data 2
|8/2/2018 (3)|
----------
Data 1
Data 2
Data 3

Im using `Listview` and `ListAdapter extends ArrayAdapter`

where do i will update?

here

public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ItemModel cell = (ItemModel) getItem(position);

if (cell.isSectionHeader()) {
//Display Date in Header XML
} else {
//Display in Section XML
}
}

or here

private ArrayList sortAndAddSections(ArrayList<ItemModel> itemList) {

ArrayList<ItemModel> tempList = new ArrayList<>();
Collections.sort(itemList);

String header = "";
for (int i = 0; i < itemList.size(); i++) {
if (!(header.equals(itemList.get(i).getDate()))) {
String data = itemList.get(i).getRemarks();
String date = itemList.get(i).getDate()
ItemModel sectionCell = new ItemModel(date,data);
sectionCell.setToSectionHeader();
tempList.add(sectionCell);
header = itemList.get(i).getDate();
}

tempList.add(itemList.get(i));
}
return tempList;
}

Updated

Here is how I transfer the data from database to array

private ArrayList<ItemModel> getItems() {
Cursor data = myDb.get_plan(email);
ArrayList<ItemModel> items = new ArrayList<>();
while (data.moveToNext()) {
String date = data.getString(3);
String data1 = data.getString(4);
items.add(new ItemModel(date,data1));
}
return items;
}

then this where the condition goes

private ArrayList sortAndAddSections(ArrayList<ItemModel> itemList) {

ArrayList<ItemModel> tempList = new ArrayList<>();

String header = "";
for (int i = 0; i < itemList.size(); i++) {
if (!(header.equals(itemList.get(i).getDate()))) {
String date = itemList.get(i).getDate();
String getData1 = itemList.get(i).getData1();
ItemModel sectionCell = new ItemModel(date,data1);
sectionCell.setToSectionHeader();
tempList.add(sectionCell);
header = itemList.get(i).getDate();
}
tempList.add(itemList.get(i));
}
return tempList;
}

this is where i set it in textview

[USER=1021285]@override[/USER]
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ItemModel cell = (ItemModel) getItem(position);

if (cell.isSectionHeader()) {
v = inflater.inflate(R.layout.section_header, null);
v.setClickable(false);
TextView header = (TextView) v.findViewById(R.id.list_date);
header.setText(cell.getDate());
} else {
v = inflater.inflate(R.layout.listview_plan, null);
TextView tv_data1 = v.findViewById(R.id.list_data1);
tv_cusname.setText(cell.getData1());
}

return v;
}

 

[Deleted User]

Code tags added to make the code slightly more readable.

 

[Deleted User]

This question will get a better response if you

a) Format the code correctly, with proper indentation
b) Include the whole class(es), rather than disjointed code fragments that don't indicate how they relate to each other.