Returns a field of a Calendar as an integer. - Android java.util

Android examples for java.util:Date Convert

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Description

Returns a field of a Calendar as an integer.

Demo Code


import android.util.Log;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main{
    private static final String TAG = TimeUtils.class.getName();
    /**Minutes elapsed in current day**/
    public static final int MINUTE_OF_DAY = 1;
    /**Minutes elapsed in current hour**/
    public static final int MINUTE_OF_HOUR = 2;
    /**Hours elapsed in current day (24 hour format)**/
    public static final int HOUR_OF_DAY = 4;
    /**Days elapsed in current year**/
    public static final int DAY_OF_YEAR = 8;
    /** Minute precision **/
    public static final int MINUTE = 32;
    public static final int MINUTES_PER_HOUR = 60;
    private static final String ERR_MESSAGE_INVALID_FIELD = "Invalid time field requested";
    /**/*from   w  w w. j  a va  2s. c o  m*/
     * Returns a field of a Calendar as an integer. Fields accepted: MINUTE_OF_DAY, MINUTE_OF_HOUR, HOUR_OF_DAY,
     * DAY_OF_YEAR
     *
     * @param field The field to retrieve
     * @param cal the Calendar
     * @return the desired field
     */
    public static int getTimeField(Calendar cal, int field) {
        //Select appropriate field
        switch (field) {
        case MINUTE_OF_DAY:
            return (cal.get(Calendar.HOUR_OF_DAY) * MINUTES_PER_HOUR)
                    + cal.get(Calendar.MINUTE);
        case MINUTE_OF_HOUR:
            return cal.get(Calendar.MINUTE);
        case HOUR_OF_DAY:
            return cal.get(Calendar.HOUR_OF_DAY);
        case DAY_OF_YEAR:
            return cal.get(Calendar.DAY_OF_YEAR);
        default:
            Log.e(TAG, ERR_MESSAGE_INVALID_FIELD
                    + "(in getCurrentTimeField())");
            return -1;
        }
    }
    /**
     * Returns a field of a Date as an integer. Fields accepted: MINUTE_OF_DAY, MINUTE_OF_HOUR, HOUR_OF_DAY,
     * DAY_OF_YEAR
     *
     * @param field The field (i.e. minute, hour, etc) to retrieve
     * @param date the Date
     * @return the desired field
     */
    public static int getTimeField(Date date, int field) {
        return getTimeField(dateToCalendar(date), field);
    }
    /**
     * Converts a Date to a Calendar
     *
     * @param date date to convert
     * @return a calendar
     */
    public static Calendar dateToCalendar(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(date.getTime());
        cal.setTimeZone(TimeZone.getDefault());
        return cal;
    }
}

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