A simple example of Android broadcast Receiver

Android broadcastreceiver

(Learning the video from instructor Mars)

Registration Method

There are two types:

One is declared in androidmanifest. xml:

<Cycler Android: Name =". Test_receiver" > <Intent-filter> <Action Android: Name ="Android. Intent. Action. Sss" /> </Intent-filter> </Cycler>

Code in the class file:

Intent intent = NewIntent (); Intent. setaction ("android. Intent. Action. Sss "); Test_bcactivity.This. Sendbroadcast (intent );

 

The other is code registration:

Bind a consumer

PublicstaticfinalString Sms_received_action= "Android. provider. telephony. sms_received "; // Generate a receiver object Extends ER = NewTest_receiver (); // Generate a filter object Intentfilter = NewIntentfilter (); // Add an action for the filter Intentfilter. addaction (Sms_received_action); Test_bcactivity.This. Registerreceiver (receiver, intentfilter );

Unbind a consumer

Test_bcactivity.This. Unregisterreceiver (receiver );

The main difference between the two is that the broadcast mechanism registered in the XML file still runs after the application is closed. Always run. The broadcast registered by code is closed after the application is closed and takes effect immediately.

 

Code for the Cycler class

PublicclassTest_receiver ExtendsBroadcastreceiver { PublicTest_receiver (){ Log.D("Test_receiver ", "Constructor "); } @ Override PublicvoidOnreceive (context, intent ){ // TodoAuto-generated method stub Log.D("Test_receiver ", "Onreceive "); } }