在Arraylist中，如何将arraylist过滤为2个日期之间的行。
例如，
从2015年10月到12月找到所有arraylist的学生。
new student ("12/05/2015",john, level2);
new student ("13/05/2015",bisnet, level2);
new student ("5/05/2015",tube, level2);
new student ("7/05/2015",eros, level2);
new student ("4/05/2015",mackay, level2);
new student ("8/05/2015",walnet, level2);
这是我的工作。如果日期在开始日期和结束日期之间。它必须显示true，否则为
public boolean systemDate(Date startDate, Date endDate, String exps) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date expenseLsDate=null;
try {
expenseLsDate = sdf.parse(exps.substring(0,10));
} catch (ParseException e) {}
// Date expenseLsDate = dateFortmat(exps);
//SimpleDateFormat dateFormat = new SimpleDateFormat("dd-mmm-yyyy");//dd-mmm-yyyy hh:mm:ss aa
// Date convertedDate = new Date();
// ArrayList<Expenses> filteredDate = new ArrayList<>();
// Iterator<Expenses> iterator = lList.iterator();
/* for (Expenses temp : lList) {
try {
convertedDate = dateFormat.parse(temp.date_of_entry);
} catch (Exception e) {
e.printStackTrace();
}*/
if ((expenseLsDate.before(endDate)) && (expenseLsDate.after(startDate))) //here "date2" and "date1" must be converted to dateFormat
{
Log.e("valid","true");
//filteredDate.add(convertedDate); // You can use these filtered ArrayList
return true;
}
//}
Log.e("valid","false");
return false;
}
上述方法用于过滤我的baseadapter。
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
mDisplayedValues = (ArrayList<Expenses>) results.values; // has the filtered values
Log.e("c", String.valueOf(mDisplayedValues.size()));
if (mDisplayedValues.isEmpty()||mDisplayedValues==null){
Log.e("FIELD_EMPTY", "NO_RECORD_FOUND");
}
notifyDataSetChanged(); // notifies the data with new filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
ArrayList<Expenses> FilteredArrList = new ArrayList<Expenses>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<Expenses>(mDisplayedValues); // saves the original data in mOriginalValues
}
/******
*
* If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
* else does the Filtering and returns FilteredArrList(Filtered)
*
*****/
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
/* public Expenses(String expenses_id, String date_of_entry, String name, String category_id,
String amount, String currency_id, String comments,
String fileid, String user_id) */
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
String expName = mOriginalValues.get(i).name;
String expAmount = mOriginalValues.get(i).amount;
String expComment = mOriginalValues.get(i).comments;
// Date startDate = systemUtils.dateFortmat(mOriginalValues.get(i).date_of_entry);
if (date1!=null && date2!=null)
isDateValid = systemUtils.systemDate(date1,date2,mOriginalValues.get(i).date_of_entry);
if (expName.toLowerCase().contains(constraint.toString()) || (expAmount.contains(constraint.toString())
|| (expComment.contains(constraint.toString())&& isDateValid))) {
FilteredArrList.add(
new Expenses(mOriginalValues.get(i).expenses_id,
mOriginalValues.get(i).date_of_entry,
mOriginalValues.get(i).name,
mOriginalValues.get(i).category_id,
mOriginalValues.get(i).amount,
mOriginalValues.get(i).currency_id,
mOriginalValues.get(i).comments,
mOriginalValues.get(i).fileid,
mOriginalValues.get(i).user_id ));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}