get Next Delay In Millis For Next Alarm

Description

Demo Code

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.SystemClock;
import android.util.Log;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class Main{

    private static final String TAG = "AlarmUtil";

    public static long getNextDelayInMillisForNextAlarm(Context context,
            int hour, int minute, String alarmDaysOfWeek) {
        ArrayList<Integer> dayOfWeekList = getDayOfWeekList(context,
                alarmDaysOfWeek);//from   w w w .jav  a 2s .  c  om
        Calendar nextAlarm = calculateNextTiming(hour, minute,
                dayOfWeekList);

        final int year = nextAlarm.get(Calendar.YEAR);
        final int month = nextAlarm.get(Calendar.MONTH);
        final int day = nextAlarm.get(Calendar.DAY_OF_MONTH);
        final int hour_r = nextAlarm.get(Calendar.HOUR_OF_DAY);
        final int minute_r = nextAlarm.get(Calendar.MINUTE);
        final int dayOfWeek_r = nextAlarm.get(Calendar.DAY_OF_WEEK);


        long nextDelayInMillis = nextAlarm.getTimeInMillis()
                - System.currentTimeMillis();
        return nextDelayInMillis;
    }
    public static Calendar calculateNextTiming(int alarmHour,
            int alarmMinute, ArrayList<Integer> daysOfWeek) {

        Calendar now = Calendar.getInstance();
        now.setTimeInMillis(System.currentTimeMillis());

        Calendar base = Calendar.getInstance();
        base.setTimeInMillis(System.currentTimeMillis());
        base.set(Calendar.HOUR_OF_DAY, alarmHour);
        base.set(Calendar.MINUTE, alarmMinute);
        base.set(Calendar.SECOND, 0);
        base.set(Calendar.MILLISECOND, 0);

        if (null == daysOfWeek || 0 == daysOfWeek.size()) {
            if (base.after(now)) {
                return base;
            } else {
                base.add(Calendar.DAY_OF_YEAR, 1);
                return base;
            }
        }

        Calendar c;
        for (Integer i : daysOfWeek) {
            c = Calendar.getInstance();
            c.setTime(base.getTime());
            c.set(Calendar.DAY_OF_WEEK, i.intValue());
            if (c.after(now)) {
                return c;
            }
        }
        c = Calendar.getInstance();
        c.setTime(base.getTime());
        c.add(Calendar.WEEK_OF_YEAR, 1);
        c.set(Calendar.DAY_OF_WEEK, daysOfWeek.get(0).intValue());
        return c;
    }

    public static ArrayList<Integer> getDayOfWeekList(Context context,
            String weeks) {

        String[] weeklist = weeks.split(",");

        String[] displayList = context.getResources().getStringArray(
                R.array.array_day_of_weeks);

        HashMap<String, Integer> map = new HashMap<String, Integer>();
        int value = Calendar.SUNDAY;
        for (int i = 0; i < displayList.length; i++) {
            map.put(displayList[i], value);
            value++;
        }

        ArrayList<Integer> list = new ArrayList<Integer>();
        for (int i = 0; i < weeklist.length; i++) {
            if (map.containsKey(weeklist[i])) {
                list.add(map.get(weeklist[i]));
            }
        }

        return list;
    }

}
get Next Delay In Millis For Next Alarm - Android android.app

Description

Demo Code

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