Android Essentials--broadcastreceiver

1. Built in the main thread of the UI, no time-consuming operation;

2. Short life cycle, mainly to play a transitional role;

3. Target components: Notification, Activity, Service;

4. Two ways of registering:

   (1) Dynamic registration, usually in Onresume () call Context.registerreceiver () registration, in OnPause () call Unregisterreceiver () logoff;

   (2) static registration, registration in the registration document;

   Usually, the event of high trigger rate is not suitable for static registration;

5. The broadcasts sent are divided into ordinary broadcasts and ordered broadcasts:

   (1) General broadcasting: All receivers registered with the broadcast are allowed to receive the broadcast;

   (2) Orderly broadcast: The receiver's priority is arranged to accept the broadcast, the recipient with high priority can terminate the broadcast (Broadcastreceiver.abortreceiver ()) and can add additional data during propagation ( Broadcastreceiver.setresult ()), after which the recipient can receive the data and process it (Broadcasereceiver.getresultdata ());

Android Essentials--broadcastreceiver