Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2013 Open Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;
import java.util.Random;

public class Main {
    public static <T extends BroadcastReceiver> void scheduleUpdate(Context context, Class<T> clazz) {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, clazz);
        PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        Random random = new Random(System.currentTimeMillis());
        long offset = random.nextLong() % (12 * 60 * 60 * 1000);
        long interval = (24 * 60 * 60 * 1000) + offset;
        String prefKey = "pref_scheduled_monitor_config_update_" + clazz.getCanonicalName();
        long scheduledTime = preferences.getLong(prefKey, -1);

        if (scheduledTime == -1) {
            context.sendBroadcast(intent);
        }

        if (scheduledTime <= System.currentTimeMillis()) {
            context.sendBroadcast(intent);
            scheduledTime = System.currentTimeMillis() + interval;
            preferences.edit().putLong(prefKey, scheduledTime).commit();
            Log.w("PeriodicActionUtils",
                    "Scheduling for all new time: " + scheduledTime + " (" + clazz.getSimpleName() + ")");
        } else {
            Log.w("PeriodicActionUtils", "Scheduling for time found in preferences: " + scheduledTime + " ("
                    + clazz.getSimpleName() + ")");
        }

        am.cancel(sender);
        am.set(AlarmManager.RTC_WAKEUP, scheduledTime, sender);

        Log.w("PeriodicActionUtils", "Scheduled for: " + scheduledTime + " (" + clazz.getSimpleName() + ")");
    }
}