set Alarm for Next alarm time - Android Android OS

Android examples for Android OS:Alarm Set Up

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Description

set Alarm for Next alarm time

Demo Code


import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.text.format.Time;
import java.util.Random;

public class Main{
    public static Time setAlarm(Context context) {
        SharedPreferences sp = PreferenceManager
                .getDefaultSharedPreferences(context);
        Time time = new Time();
        time.parse(sp.getString("time", ""));

        AlarmManager am = (AlarmManager) context
                .getSystemService(Context.ALARM_SERVICE);
        Intent i = new Intent(context, Receiver.class);
        PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
        Random r = new Random();
        int randomMinute = r.nextInt(sp.getInt("time_variation", 0) + 1);
        Time alarmTime = getNextAlarmTime(context, time, randomMinute);
        am.set(AlarmManager.RTC_WAKEUP, alarmTime.toMillis(false), pi);

        sp.edit()// w w  w .  j  av a2 s  .  c  o m
                .putString("alarm_time",
                        alarmTime.format("Next alarm %Y/%m/%d %H:%M:%S"))
                .commit();
        return alarmTime;
    }
    public static Time getNextAlarmTime(Context context, Time time,
            int randomMinute) {
        Time now = new Time();
        Time alarmTime = new Time();
        now.setToNow();
        alarmTime.set(now);
        alarmTime.set(now.second, time.minute, time.hour, now.monthDay,
                now.month, now.year);
        alarmTime.normalize(false);
        alarmTime.minute += randomMinute;
        alarmTime.normalize(false);
        if (alarmTime.before(now)) {
            alarmTime.monthDay += 1;
            alarmTime.normalize(false);
        }

        return alarmTime;
    }
}

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