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目前，我正在创建一个日历应用程序，该应用程序基本上会让员工选择开始日期和结束日期。在这些日期之间选择的持续时间将是员工选择的假期。

现在的问题是我需要将 2 个日期（开始日期和结束日期）存储到 firebase 数据库中。我打算稍后使用此信息，以便我可以将日期与可能在同一周休假的其他员工进行比较（因此需要验证）。但是，使用我当前的代码，我只能创建开始日期而不能创建结束日期，我也无法将信息存储到云中，但我很难理解如何以当前形式检索数据。

为了进一步澄清，我想要实现的是：我将有 2 个按钮，startDateBtn并且endDateBtn，两者都将初始化一个日历，选择的日期将作为字符串存储/返回，数据将由名为 的第三个按钮检索bookDatesBtn。此按钮会将数据保存到云中。

我试过的：

  • 使用设置为 false 的布尔变量，如果startDateBtn初始化布尔变量设置为 true，这将触发 if-else 语句并将开始日期的信息设置为字符串。如果endDateBtn已初始化，则布尔变量将设置为 false，这会将结束日期的信息保存为字符串。

日期选择器片段.Java

import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.DialogFragment;

import java.util.Calendar;

public class DatePickerFragment extends DialogFragment{

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);

        return new DatePickerDialog(getActivity(), (DatePickerDialog.OnDateSetListener) getActivity(), year, month, day);

    }
    
}

HolidayScreen.Java

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.DialogFragment;

import android.app.DatePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

import java.text.DateFormat;
import java.util.Calendar;

public class HolidayScreen extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_holiday_screen);

//        //Setting listener for start date button for picking date
        Button startButton = (Button) findViewById(R.id.startDateButton);
        startButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                DialogFragment datePicker = new DatePickerFragment();
                datePicker.show(getSupportFragmentManager(), "start date picker");

            }
        });

        //Setting listener for start date button for picking date
        Button endButton = (Button) findViewById(R.id.endDateButton);
        endButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                DialogFragment datePicker = new DatePickerFragment();
                datePicker.show(getSupportFragmentManager(), "end date picker");
            }
        });

        //Setting listener for storing both dates into the cloud
        Button bookButton = (Button) findViewById(R.id.bookButton);
        bookButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //This is where all the logic will go, so i will retrieve the start date information and then the-
                //-end date information and store into firebase database
            }
        });

    }


    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {

        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, dayOfMonth);
        String currentDateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.getTime());


            TextView startTextView = (TextView) findViewById(R.id.startDateText);
            startTextView.setText("Start Date: " + currentDateString);
    }

}

XML 文件将根据要求提供。

4

2 回答 2

1

这是我的个人使用代码，它适用于我的所有设备我认为你应该试试这个代码......

我想知道您必须使用哪个 firebase 数据库，所以在我建议之后.. firebase real-time OR Cloud-firestore 用于存储数据...

对于整个代码访问我的代码链接 - https://github.com/axarlotwala/CafeDelear/blob/master/app/src/main/java/com/cafedelear/aksha/cafedelear/Fragment/ProductOfferFragment.java

/*method of start offer*/

private void offerStart() {

    final Calendar calendar = Calendar.getInstance();
    myear = calendar.get(Calendar.YEAR);
    dmonth = calendar.get(Calendar.MONTH);
    mdate = calendar.get(Calendar.DAY_OF_MONTH);

    dialog = new DatePickerDialog(getActivity(), new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {

            start_date.setText(year + "-" + (month+1) + "-" + dayOfMonth);
        }
    },myear,dmonth,mdate);
    dialog.show();

    dialog.getDatePicker().setMinDate(calendar.getTimeInMillis());
}

private void offerEnd(){

    final Calendar calendar = Calendar.getInstance();
    myear = calendar.get(Calendar.YEAR);
    dmonth = calendar.get(Calendar.MONTH);
    mdate = calendar.get(Calendar.DAY_OF_MONTH);
    calendar.roll(Calendar.DATE,1);


    dialog = new DatePickerDialog(getActivity(), new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {

            end_date.setText(year + "-" + (month+1) + "-" + dayOfMonth);
        }
    },myear,dmonth,mdate);
    dialog.show();

    dialog.getDatePicker().setMinDate(calendar.getTimeInMillis());

    //if offer end date is selected is also start Offer date then offer end time is Date-23-59-59
}
于 2021-04-02T06:07:43.393 回答
0

这里是你可以在你的 textview 中了解上一个或新的日期，然后使用它

上一个日期：

     public void previousDate(Context context, TextView textView) {
    mCalendarAlarm = Calendar.getInstance();
    mCalendarAlarm.setTimeZone(TimeZone.getDefault());
    DatePickerDialog datePickerDialog =
            new DatePickerDialog(context, (view, year, monthOfYear, dayOfMonth) -> {
                mCalendarAlarm.set(Calendar.YEAR, year);
                mCalendarAlarm.set(Calendar.MONTH, monthOfYear);
                mCalendarAlarm.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
                String datetime = dateFormat.format(mCalendarAlarm.getTime());
                textView.setText(datetime);
            }, mCalendarAlarm.get(Calendar.YEAR), mCalendarAlarm.get(Calendar.MONTH),
                    mCalendarAlarm.get(Calendar.DAY_OF_MONTH));
    datePickerDialog.getDatePicker().
            setMaxDate(mCalendarAlarm.getTimeInMillis());
    datePickerDialog.show();
}

下一个日期：

public void NextDate(Context context, TextView textView) {
    mCalendarAlarm = Calendar.getInstance();
    mCalendarAlarm.setTimeZone(TimeZone.getDefault());
    DatePickerDialog datePickerDialog =
            new DatePickerDialog(context, (view, year, monthOfYear, dayOfMonth) -> {
                mCalendarAlarm.set(Calendar.YEAR, year);
                mCalendarAlarm.set(Calendar.MONTH, monthOfYear);
                mCalendarAlarm.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
                String datetime = dateFormat.format(mCalendarAlarm.getTime());
                textView.setText(datetime);
            }, mCalendarAlarm.get(Calendar.YEAR), mCalendarAlarm.get(Calendar.MONTH),
                    mCalendarAlarm.get(Calendar.DAY_OF_MONTH));
    datePickerDialog.getDatePicker().
            setMinDate(mCalendarAlarm.getTimeInMillis());
    datePickerDialog.show();
}
于 2021-04-02T05:10:40.773 回答