android学习笔记之六广播(BroadcastReceiver)
用于接收外部事件(注意BroadcastReceiver是用时创建用完后即摧毁的)
?1,获取
?? a,注册 Context.registerReceiver (BroadcastReceiver receiver, IntentFilter filter)
???? receiver 为获取BroadcastReceiver事件的类
???? filter?? 事件过滤器为sendBroadcast中的intent
???? 与之对应的Context.unregisterReceiver (BroadcastReceiver receiver)
???? 或在<application>节内添加
???? <receiver android:name=".接收事件BoardCastReceiver类">
??<intent-filter android:name="要接受的事件">
??</intent-filter>
???? </receiver>
?? b,继承该类须实现 public void onReceive(Context context, Intent intent)方法
?2,产生
?? Context.sendBroadcast
?? 如果传入的参数是Intent(name)那么name应该等于<intent-filter android:name="要接受的事件">
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