Android中的广播和广播接收器代码实例
BroadcastReceiver不仅可以接收系统广播，也可接收自定义的广播
1.定义一个广播接收器
publicclassMyReceiverextendsBroadcastReceiver
{
publicMyReceiver()
{
Log.i(TAG,"MyReceiver");
}
//可用Intent的getAction()区分接收到的不同广播
@Override
publicvoidonReceive(Contextarg0,Intentarg1)
{
Stringaction=intent.getAction();
//TO-DOLIST
}
}
2.发送广播，定义好action标志，用Intent发送
//实例化该BroadcastReceiver MyReceivermReceiver=newMyReceiver(); //设置唯一action，用Intent发送 Intentintent=newIntent(); intent.setAction(str); sendBroadcast(intent);
3.注册只接收指定action的广播接收器
IntentFilterfilter1=newIntentFilter(); filter1.addAction(str); registerReceiver(mReceiver,filter1);
4.取消该广播接收器
unregisterReceiver(mReceiver);