Broadcast and broadcast receiver code instances in Android _android

Broadcastreceiver can not only receive system broadcasts, but also receive customized broadcasts

1. Define a broadcast receiver

Copy Code code as follows:

public class Myreceiver extends Broadcastreceiver
{
Public Myreceiver ()
{
LOG.I (TAG, "myreceiver");
}

Getaction () of intent can be used to distinguish between different broadcasts received
@Override
public void OnReceive (context arg0, Intent arg1)
{
String action=intent.getaction ();
TO-DO LIST
}

}

2. Send a broadcast, define a good action flag, send with intent

Copy Code code as follows:

Instantiation of the Broadcastreceiver
Myreceiver mreceiver=new myreceiver ();
Set unique action, send with intent
Intent intent=new Intent ();
Intent.setaction (str);
Sendbroadcast (Intent);

3. Register a broadcast receiver that receives only the specified action

Copy Code code as follows:

Intentfilter filter1=new Intentfilter ();
Filter1.addaction (str);
Registerreceiver (Mreceiver,filter1);

4. Cancel the broadcast receiver

Copy Code code as follows:

Unregisterreceiver (Mreceiver);