Alert clock Learning

I recently looked at the alarm management class (alarmmanager) of Android, which is powerful and simple,CodeAs follows:

1. Create an alarmreceiver to inherit from broadcastreceiver and declare it in androidmanifest. xml.
Public static class alarmreceiver extends broadcastreceiver {
@ Override
Public void onreceive (context, intent ){
Toast. maketext (context, "alarm prompt: time is up! ", Toast. length_long). Show ();
}
}

2. Create intent and pendingintent to call the target component.
Intent intent = new intent (this, alarmreceiver. Class );
Pendingintent = pendingintent. getbroadcast (this, 0, intent, 0 );

3. set an alarm
Get the alarm management instance:
Alarmmanager = (alarmmanager) getsystemservice (context. alarm_service );

Set a single alarm:
Alarmmanager. Set (alarmmanager. rtc_wakeup, system. currenttimemillis () + (5*1000), pendingintent );

Set the cycle alarm:
Alarmmanager. setrepeating (alarmmanager. rtc_wakeup, system. currenttimemillis () + (10*1000), (24*60*60*1000), pendingintent );

 

3-4:

Re-calculate and set the alert time after reboot

Of course there must be a bootreceiver:
Public class bootreceiver extends broadcastreceiver {
Public void onreceive (context, intent ){
String action = intent. getaction ();
If (action. Equals (intent. action_boot_completed )){
// Recalculate the alert time, and set the alert time and alert interval in step 1.
Alarmmanager AM = (alarmmanager) Context. getsystemservice (context. alarm_service );


Intent intent = new intent ("intent. action_request_shutdown ");

Pendingintent sender = pendingintent. getbroadcast (context, 0, intent, pendingintent. flag_cancel_current );

Int interval = 60*1000; // alert interval. this parameter is set to 1 minute. in step 1, we will receive a broadcast every 1 minute.

Am. Set (alarmmanager. rtc_wakeup, timeinmillis, interval, Sender)

}< BR >}< br> Of course, you also need to register: