How to use Android development Alarmmanager

How to use Android development Alarmmanager

During the Android development process. Alarmmanager is often used to send a broadcast periodically, or to start a service, or to start an activity. In this paper, we will introduce the three usages of alarmmanager in the development process respectively.

1. Use alarm to send a broadcast

First, we need to create an instance of intent. Used to send broadcasts. The code is as follows:

The action that needs to be sent can be arbitrarily defined, and the following code sends a clock broadcast every five seconds

Need to define a receiver in manifest to receive the clock broadcast

Intent Intent = new Intent (); Intent.setaction ("CLOCK");
Intent.putextra ("msg", "alarm start");
Pendingintent pendingintent = Pendingintent.getbroadcast (this, 0,intent, 0);
Alarmmanager am = (alarmmanager) getsystemservice (Alarm_service);
LOG.I (TAG, "Alarm"); am.setrepeating (Alarmmanager.rtc_wakeup,
System.currenttimemillis (), 5*1000, pendingintent);

2, use alarm to start an activity, the code is as follows:

Intent Intent = new Intent ();
Intent.setclass (Mainactivity.this, Alarmactivity.class);

Pendingintent pendingintent = pendingintent.getactivity (this, 0,intent, 0);

Alarmmanager am = (alarmmanager) getsystemservice (Alarm_service);

Am.set (Alarmmanager.rtc_wakeup, System.currenttimemillis () + 5*1000, pendingintent);

3, use alarm to start a service, the code is as follows:

The service needs to be declared under manifest.

Intent Intent = new Intent ();
Intent.setclass (Mainactivity.this, Alarmservice.class);


Pendingintent pendingintent = Pendingintent.getservice (this, 0,intent, 0);

Alarmmanager am = (alarmmanager) getsystemservice (Alarm_service);
LOG.I (TAG, "Alarm");
Am.set (Alarmmanager.rtc_wakeup, System.currenttimemillis () + 5*1000, pendingintent);

The method of canceling the timer is as follows:

Intent i = new Intent ();
I.setaction ("CLOCK");
I.putextra ("msg", "alarm start");

The parameter 2 is the ID. Cancel alarm with id 0
Pendingintent pendingintent = pendingintent.getbroadcast (this, 0,
I, 0);
Alarmmanager am = (alarmmanager) getsystemservice (Alarm_service);

Am.cancel (pendingintent);

am.setrepeating ()//Indicates periodic start-up

Am.set ()//= start once

How to use Android development Alarmmanager