使用Android AlarmManager类定时执行任务

下面的代码是使用Android AlarmManager类可以完成定时执行任务的样例代码。首先创建Intent和日历(Calendar)对象，然后使用AlarmManager去运行这个intent。

代码：
new Intent(getBaseContext(), some_service.class);
PendingIntent pendingIntent = PendingIntent
.getService(getBaseContext(), 0, intent, 0);

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
// 取消以前同类型的提醒
alarmManager.cancel(pendingIntent);

Calendar calendar = Calendar.getInstance();
Calendar currentDate = Calendar.getInstance();

calendar.add(Calendar.HOUR, 24);
calendar.set(Calendar.HOUR_OF_DAY, 07);
calendar.set(Calendar.MINUTE, 00);
calendar.set(Calendar.SECOND, 00);

// 设定每天在指定的时间运行alert
alarmManager.setRepeating(AlarmManager.RTC,
calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pendingIntent);