无法使用日期从 SQLite 房间数据库中获取数据

Question

I have a typeconverter that goes like this

public class DateConverter {
    @TypeConverter
    public static Date convertLongToDate(Long dateLong) {
        return dateLong == null ? null : new Date(dateLong);
    }

    @TypeConverter
    public static Long convertDateToLong(Date date) {
        return date == null ? null : date.getTime();
    }
    
    ...
}

And I use it in my database

@Database(entities = { LoginEntity.class,
        Transaction.class,
        UnsentTagNumbers.class }, version = 11, exportSchema = false)
@TypeConverters(DateConverter.class)
public abstract class ApplicationDatabase extends RoomDatabase {
    public abstract LoginDao loginDao();
    ...
}

In inserting the transaction to the database, I do it like so.

public void recordTransaction() {
    transaction.setTransactionDate(Calendar.getInstance().getTime()); <==== Please take note on the way that I use the current date.
    transaction.setTransactionType(getApplication().getString(R.string.exit_scan));
    ...
    transactionRepository.insert(transaction);
}

In my DAO

@Query("SELECT * FROM TRANSACTION_TABLE WHERE transactionDate >= :fromDate AND transactionDate <= :toDate AND staffId = :staffId")
LiveData<List<Transaction>> getTransactionSummaryByDates(Date fromDate, Date toDate, String staffId);

This is how I search for the transactions by dates

public void onClick(View v) {
    switch (v.getId()) {
    case R.id.btnStartDate:
            if(!hasSelectedStaffId) {
                Toast.makeText(this, "Select a staff id first.", Toast.LENGTH_SHORT).show();
                return;
            }
            Calendar cldr = Calendar.getInstance();
            int day = cldr.get(Calendar.DAY_OF_MONTH);
            int month = cldr.get(Calendar.MONTH);
            int year = cldr.get(Calendar.YEAR);
            dpdStartDate = new DatePickerDialog(this,
                    new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                            hasSelectedStartDate = true;
                            startDate = new Date(year, monthOfYear, dayOfMonth, 0, 0, 0);
                            btnStartDate.setText(dayOfMonth + "/" + (monthOfYear + 1) + "/" + year);
                        }
                    }, year, month, day);
            dpdStartDate.show();
            break;
        case R.id.btnEndDate:
            cldr = Calendar.getInstance();
            day = cldr.get(Calendar.DAY_OF_MONTH);
            month = cldr.get(Calendar.MONTH);
            year = cldr.get(Calendar.YEAR);
            dpdEndDate = new DatePickerDialog(this,
                    new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                            endDate = new Date(year, monthOfYear, dayOfMonth, 23, 59, 59);
                            btnEndDate.setText(dayOfMonth + "/" + (monthOfYear + 1) + "/" + year);
                            if (hasSelectedStartDate && hasSelectedStaffId) {
                                viewModel.getTransactions(startDate, endDate, selectedStaffId);
                                transactionAdapter.setTransactionList(transactionList);
                                transactionAdapter.notifyDataSetChanged();
                            }
                        }
                    }, year, month, day);
            dpdEndDate.show();
            break;
    }
}

And this is in my viewmodel to get the transactions

public void getTransactions(Date startDate, Date endDate, String staffId) {
    transactionList = transactionRepository.getTransactionSummaryByDates(startDate, endDate, staffId);
}

How come, I do not get any information from the database? If I check my database, the transactions are recorded. Please see image.

This is the parameters I send so I can get via dates

startDate: Wed Jan 25 00:00:00 GMT+08:00 3922 endDate: Thu Jan 26 23:59:59 GMT+08:00 3922 staffId: 10164

But if I convert my dates that I get from the datepicker to epoch like this:

if (hasSelectedStartDate && hasSelectedStaffId) {
    Long lStartDate = startDate.getTime();
    Long lEndDate = endDate.getTime();
                                  
    viewModel.getTransactions(lStartDate, lEndDate, selectedStaffId);
                                 
    //viewModel.getTransactions(startDate, endDate, selectedStaffId);
    //setupTransactionList();
                            }

I've noticed that in my database, the date is 16431... But when I query and I convert my date parameters, it is 6060....

How do I make this right? Thank you.

Answer 1

The mistake I had was in the codes of my onClick(View...). I just converted my Date Pickers to Calendar and got the time from it like so..

public void onClick(View v) {
    switch (v.getId()) {
        case R.id.btnStartDate:
            if(!hasSelectedStaffId) {
                Toast.makeText(this, "Select a staff id first.", Toast.LENGTH_SHORT).show();
                return;
            }
            Calendar cldr = Calendar.getInstance();
            int day = cldr.get(Calendar.DAY_OF_MONTH);
            int month = cldr.get(Calendar.MONTH);
            int year = cldr.get(Calendar.YEAR);
            dpdStartDate = new DatePickerDialog(this,
                    new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                            hasSelectedStartDate = true;
                            cldr.set(year, monthOfYear, dayOfMonth, 23, 59, 59);
                            startDate =  cldr.getTime(); //new Date(year, monthOfYear, dayOfMonth, 0, 0, 0);
                            btnStartDate.setText(dayOfMonth + "/" + (monthOfYear + 1) + "/" + year);
                        }
                    }, year, month, day);
            dpdStartDate.show();
            break;
        case R.id.btnEndDate:
            if(!hasSelectedStaffId) {
                Toast.makeText(this, "Select a staff id first.", Toast.LENGTH_LONG).show();
                return;
            }
            if(!hasSelectedStartDate) {
                Toast.makeText(this, "Select a start date first.", Toast.LENGTH_LONG).show();
                return;
            }
            cldr = Calendar.getInstance();
            day = cldr.get(Calendar.DAY_OF_MONTH);
            month = cldr.get(Calendar.MONTH);
            year = cldr.get(Calendar.YEAR);
            dpdEndDate = new DatePickerDialog(this,
                    new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                            cldr.set(year, monthOfYear, dayOfMonth, 23, 59, 59);
                            endDate = cldr.getTime();
                            btnEndDate.setText(dayOfMonth + "/" + (monthOfYear + 1) + "/" + year);
                            if (hasSelectedStartDate && hasSelectedStaffId) {
                                viewModel.getTransactions(startDate, endDate, selectedStaffId);
                                setupTransactionList();
                            }
                        }
                    }, year, month, day);
            dpdEndDate.show();
            break;
    }
}

The endDate = new Date(year, monthOfYear, dayOfMonth, 23, 59, 59); had a different format so since I was using the "Calendar" instance when saving, I figured that it should have been a "Calendar" instance that I should be passing as parameters.