我正在尝试在自定义arrayadapter中对集合进行排序，并调用更新视图。但是，视图不会更新。
我想对两个值进行排序（日期和金额），并为它们设置自定义比较器。
我可以看到数据本身已经发生了变化（例如，如果列表项在排序后已经超出视图范围，当它获得视图时，它显示的数据是排序后应该存在的正确数据。）
第二个问题是关于过滤器。现在实现过滤器的方式，它也不会更新视图。
这是代码
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;
}
}