Android Review--broadcast

There are two ways of broadcasting , a static broadcast and a dynamic broadcast.

Static broadcast---static broadcast receivers are registered inside the configuration file.

Dynamic broadcast receivers are registered in the code.

Sending of broadcasts:

Context.sendbroadcast ();

Context.sendorderedbroadcast ();

Context.sendstickybrodcast ();

A broadcast can be received by multiple broadcast receivers.

Broadcast receivers can only accept broadcasts and respond to broadcast notifications.

The broadcast recipient does not have a user interface, but can receive and initiate an activity.

Time-consuming operations are not possible in the broadcast, and time-consuming operations are time-consuming to service and activity by initiating service and activity.

Broadcastreceiver Security Issues

http://blog.csdn.net/yuanzeyao/article/details/38948863

Subscription to broadcast:

1. Register the broadcast receiver in the configuration file:

<receiver android:name= ". Comm. Connectivitychangebroadcastreceiver ">            <intent-filter>                <action android:name=" Android.net.conn.CONNECTIVITY_CHANGE "/>            </intent-filter></receiver>

2. Register the broadcast recipient in the code:

　　　

Intentfilter filter = new Intentfilter ();

Filter.addaction (intent.action_screen_on);

Filter.addaction (Intent.action_screen_off);

Filter.addaction (Intent.action_time_tick);

Registerreceiver (new Dynamicbroadcastreceiver (), filter);

Android Review--broadcast