Comparing two times in android

Question

I have tried with the below code to compare two times:

   SimpleDateFormat sdf = new SimpleDateFormat(\"hh:mm\");
    Date inTime = sdf.parse(\"11:00\");
            


        

Answer 1

import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by Ketan Ramani on 20/9/18.
 */

public class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
    private static EditText text;
    private static TextView textTv;
    private static Date startDate = null;
    private static Date fromTime = null;

    public static TimePickerFragment getInstance(View view) {
        if (view instanceof EditText) {
            text = (EditText) view;
        } else if (view instanceof TextView) {
            textTv = (TextView) view;
        }

        return new TimePickerFragment();
    }

    public static TimePickerFragment getInstance(View view, Date fromTimeCalendar) {
        if (view instanceof EditText) {
            text = (EditText) view;
        } else if (view instanceof TextView) {
            textTv = (TextView) view;
        }

        fromTime = fromTimeCalendar;

        return new TimePickerFragment();
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);

        // Create a new instance of TimePickerDialog and return it
        return new TimePickerDialog(getActivity(), this, hour, minute, true/*DateFormat.is24HourFormat(getActivity())*/);
    }

    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

        if (fromTime != null) {

            Calendar fromTimeCal = Calendar.getInstance();
            fromTimeCal.setTime(fromTime);

            SimpleDateFormat sdf = new SimpleDateFormat("hh:mm");
            Date toDate = null;
            try {
                toDate = sdf.parse(String.format("%02d", hourOfDay) + ":" + String.format("%02d", minute));
            } catch (ParseException e) {
                e.printStackTrace();
            }

            Calendar toTimeCal = Calendar.getInstance();
            toTimeCal.setTime(toDate);

            if (toTimeCal.getTimeInMillis() 12 ? hourOfDay - 12 : hourOfDay;
        hour = hourOfDay > 9 ? hourOfDay : hourOfDay;
        min = minute > 9 ? minute : minute;

        return String.format("%02d", hour) + ":" + String.format("%02d", min) + " " + am_pm;
    }

    public void showTimePickerDialog(Context context, View view) {
        DialogFragment newFragment = TimePickerFragment.getInstance(view);
        newFragment.show(((AppCompatActivity) context).getSupportFragmentManager(), "TimePicker");
    }

    public void showTimePickerDialog(Context context, View view, Date fromTime) {
        DialogFragment newFragment = TimePickerFragment.getInstance(view, fromTime);
        newFragment.show(((AppCompatActivity) context).getSupportFragmentManager(), "TimePicker");
    }
}

Use

@Override
    public void onClick(View v) {
        switch (v.getId()) {

            case R.id.et_from_time:

                TimePickerFragment fromTime = new TimePickerFragment();
                fromTime.showTimePickerDialog(context, v, null);

                mToTimeEt.setText("Select To Time");
                break;

            case R.id.et_to_time:

                if(mFromTimeEt.getText().toString().equalsIgnoreCase("Select From Time")){
                    Helper.showToast(context,"Please, select from time first");
                } else {
                    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
                    Date fromDate = null;
                    try {
                        fromDate = sdf.parse(mFromTimeEt.getText().toString());
                    } catch (ParseException e) {
                        e.printStackTrace();
                    }

                    TimePickerFragment toTime = new TimePickerFragment();
                    toTime.showTimePickerDialog(context, v, fromDate);
                }
                break;
        }
    }

This class will work for EditText and TextView and set time to respected EditText or TextView if To time is After From Time in HH:mm a Format