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Spread the smart learner note--l37 Broadcasreceiver and SMS Blocker

Source: Internet
Author: User
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What is broadcastreceiver for?
  • is an implementation of the observer pattern mechanism
  • Broadcastreceiver is usually out of wait until the event it subscribes to is triggered
  • As with Activity,contentprovider, you need to inherit broadcastreceiver and register in manifest
How do I subscribe to events?

How does the event issue a broadcast? What kind of broadcast do you use to express?
  • Broadcast is divided into ordinary broadcast and orderly broadcast
  • The system receives the SMS broadcast as an orderly broadcast
Broadcastreceiver How to receive broadcasts?
  • Filter by intent
  • When the system receives a broadcast intent for a subscription, it automatically instantiates the Broadcastreceiver class that we defined, calling the OnReceive () method

Spread the smart learner note--l37 Broadcasreceiver and SMS Blocker

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