NotifyDataSetChanged does not update listView of custom objects after sorting
I am trying to sort a collection in a custom array and make a call to update the view. However, the view is not updated.
There are two values I want to sort by (date and quantity) and have custom comparators for them.
I can see that the data itself has changed (i.e. if the list item has gone out of view after the sort and when it gets the view, the data it shows is the correct data that should exist after the sort).
The second question concerns the filter. The way the filter is implemented right now, it doesn't update the views either.
Here is the code
public class SearchActivity extends BListActivity {
private Bundle sessionInfo;
private TransactionDetailsHandler transactionDetailsHandler = new TransactionDetailsHandler();
private static boolean ascDate = false;
private static boolean ascAmount = false;
private ArrayList<TransactionDetails> transactionDetails;
private ArrayList<TransactionDetails> filterResults;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sessionInfo = getIntent().getExtras();
final String sessionId = sessionInfo.getString("sessionId");
final String transactionResponse = sessionInfo
.getString(C.TRN_DETAIL_KEY);
try {
Xml.parse(transactionResponse, transactionDetailsHandler);
} catch (Exception ex) {
ex.printStackTrace();
}
final ArrayAdapter<TransactionDetails> adapter = getArrayAdapter();
findViewById(R.id.amount_btn).setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
if (ascDate) {
adapter.sort(new TransactionDetailAmountComparatorAsc());
ascDate = false;
} else {
adapter.sort(new TransactionDetailAmountComparatorDesc());
ascDate = true;
}
adapter.notifyDataSetChanged();
}
});
findViewById(R.id.date_btn).setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
if (ascAmount) {
adapter.sort(new TransactionDetailDateComparatorAsc());
ascAmount = false;
} else {
adapter.sort(new TransactionDetailDateComparatorDesc());
ascAmount = true;
}
adapter.notifyDataSetChanged();
}
});
findViewById(R.id.search_btn).setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
findViewById(R.id.buttonLL).setVisibility(View.GONE);
findViewById(R.id.searchLL).setVisibility(View.VISIBLE);
}
});
findViewById(R.id.cancel_btn).setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
findViewById(R.id.searchLL).setVisibility(View.GONE);
findViewById(R.id.buttonLL).setVisibility(View.VISIBLE);
}
});
TextWatcher filterTextWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
System.out.println("XXXX Constraint = " + s);
adapter.getFilter().filter(s);
}
};
EditText et = (EditText) findViewById(R.id.edit_box);
et.addTextChangedListener(filterTextWatcher);
}
protected ArrayAdapter<TransactionDetails> getArrayAdapter() {
transactionDetails = transactionDetailsHandler
.getTransactionDetailsList();
filterResults = transactionDetails;
return new SearchListAdapter(this,
(List<TransactionDetails>) transactionDetails);
}
protected class SearchListAdapter extends ArrayAdapter<TransactionDetails> {
private int rId;
private List<TransactionDetails> data;
private Filter filter;
public SearchListAdapter(Context context, List<TransactionDetails> data) {
super(context, R.layout.search_list_item, data);
this.rId = R.layout.search_list_item;
this.data = data;
}
@Override
public View getView(int position, View cv, ViewGroup parent) {
cv = getLayoutInflater().inflate(rId, parent, false);
TransactionDetails item = data.get(position);
((TextView) cv.findViewById(R.id.t_id)).setText(item.getTrnId());
((TextView) cv.findViewById(R.id.date)).setText(item
.getTrnDatetime());
((TextView) cv.findViewById(R.id.amount)).setText(item
.getTrnAmount());
((TextView) cv.findViewById(R.id.card_num))
.setText("XXXX XXXX XXXX " + item.getTrnMaskedCard());
try {
if (item.getTrnCardType() != null
&& item.getTrnCardType().trim().length() > 0)
((ImageView) cv.findViewById(R.id.card_img))
.setImageResource(Integer.parseInt(item
.getTrnCardType()));
} catch (Exception ex) {
ex.printStackTrace();
}
((TextView) cv.findViewById(R.id.result)).setText(item
.getTrnStatus());
return cv;
}
@Override
public Filter getFilter() {
if (filter == null)
filter = new TransactionDetailFilter();
return filter;
}
private class TransactionDetailFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
System.out.println("XXXX Started filtering with Constraint = "
+ constraint);
FilterResults results = new FilterResults();
String prefix = constraint.toString().toLowerCase();
if (prefix == null || prefix.length() == 0) {
ArrayList<TransactionDetails> list = new ArrayList<TransactionDetails>(
transactionDetails);
results.values = list;
results.count = list.size();
} else {
final ArrayList<TransactionDetails> list = new ArrayList<TransactionDetails>(
transactionDetails);
final ArrayList<TransactionDetails> nlist = new ArrayList<TransactionDetails>();
int count = list.size();
System.out
.println("XXXX List to be search size = " + count);
for (int i = 0; i < count; i++) {
final TransactionDetails details = list.get(i);
System.out.println("XXXX List to be searched = "
+ details.toString());
if (details.getTrnId().startsWith(prefix)
|| details.getTrnDatetime().startsWith(prefix)
|| details.getTrnAmount().startsWith(prefix)
|| details.getTrnMaskedCard()
.startsWith(prefix)
|| details.getTrnStatus().startsWith(prefix)) {
System.out.println("XXXX Adding result "
+ details.toString());
nlist.add(details);
}
}
results.values = nlist;
results.count = nlist.size();
}
System.out.println("XXXX Ended filtering with Constraint = "
+ constraint + " . Result size = " + results.count);
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
System.out.println("XXXX Preparing to publish results. Result size = "+ results.count);
ArrayList<TransactionDetails> fitems = (ArrayList<TransactionDetails>) results.values;
clear();
int count = fitems.size();
for (int i = 0; i < count; i++) {
TransactionDetails details = (TransactionDetails) fitems
.get(i);
add(details);
}
notifyDataSetChanged();
System.out.println("XXXX Finished publishing results.");
}
}
@Override
public void add(TransactionDetails item) {
System.out.println("XXXX Adding items to be published." + item.toString());
filterResults.add(item);
}
}
// -------------------------------------------------------------------------------------------------------------------------------------------------
class TransactionDetailAmountComparatorAsc implements
Comparator<TransactionDetails> {
public int compare(TransactionDetails detail1,
TransactionDetails detail2) {
float f = Float.parseFloat(detail1.getTrnAmount())
- Float.parseFloat(detail2.getTrnAmount());
if (f > 0)
return 1;
if (f < 1)
return -1;
return 0;
}
}
class TransactionDetailAmountComparatorDesc implements
Comparator<TransactionDetails> {
public int compare(TransactionDetails detail1,
TransactionDetails detail2) {
float f = Float.parseFloat(detail1.getTrnAmount())
- Float.parseFloat(detail2.getTrnAmount());
if (f > 0)
return -1;
if (f < 1)
return 1;
return 0;
}
}
class TransactionDetailDateComparatorAsc implements
Comparator<TransactionDetails> {
public int compare(TransactionDetails detail1,
TransactionDetails detail2) {
detail1.getTrnDatetime();
detail2.getTrnDatetime();
String pattern = "MM/dd/yy HH:mm";
SimpleDateFormat format = new SimpleDateFormat(pattern);
try {
Date date1 = format.parse(detail1.getTrnDatetime());
Date date2 = format.parse(detail2.getTrnDatetime());
return date1.compareTo(date2);
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
}
class TransactionDetailDateComparatorDesc implements
Comparator<TransactionDetails> {
public int compare(TransactionDetails detail1,
TransactionDetails detail2) {
detail1.getTrnDatetime();
detail2.getTrnDatetime();
String pattern = "MM/dd/yy HH:mm";
SimpleDateFormat format = new SimpleDateFormat(pattern);
try {
Date date1 = format.parse(detail1.getTrnDatetime());
Date date2 = format.parse(detail2.getTrnDatetime());
return -(date1.compareTo(date2));
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
}
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
position -= ((ListView) parent).getHeaderViewsCount();
TransactionDetails details = (TransactionDetails) parent.getAdapter()
.getItem(position);
Bundle b = new Bundle(sessionInfo);
b.putSerializable(C.TRN_DETAIL_KEY, details);
Util.openView(SearchActivity.this, TransDetailActivity.class, b);
}
@Override
protected int getContentView() {
return R.layout.search_layout;
}
@Override
protected int getStringArrayID() {
return 0;
}
@Override
protected Class<?>[] getDestinations() {
return null;
}
@Override
protected int getTitleId() {
return R.string.search;
}
}
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