Android--Simple broadcast receive and send (2)--dynamic registration of broadcast receivers

Source: Internet
Author: User


2. Code

1. Layout files

<Button Android:id= "@+id/button1"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "@string/btn1" > </Button> <Button Android:id= "@+id/button2"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "@string/btn2" > </Button> <Button Android:id= "@+id/button3"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "@string/btn3" > </Button>
 Public classFirstactivityextendsActivity { Public Static FinalString my_action = "Iflab.test.MY_ACTION";//Custom ActionMyreceiver receiver;//Myreceiver Object@Override Public voidOnCreate (Bundle savedinstancestate) {//overloaded OnCreate Method        Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.main); Button BTN1= (Button) Findviewbyid (;//Get IDButton btn2 =(Button) Findviewbyid (; Button Btn3=(Button) Findviewbyid (; Btn1.setonclicklistener (NewView.onclicklistener () {//Setting up Listeners@Override Public voidOnClick (View v) {//TODO auto-generated Method StubIntent Intent =NewIntent ();//Intent ObjectIntent.setaction (my_action);//Set ActionIntent.putextra ("message", "Messages from the broadcast!") ");//set up a broadcast messageSendbroadcast (Intent);//Send broadcast            }        }); Btn2.setonclicklistener (NewView.onclicklistener () {//Setting up Listeners@Override Public voidOnClick (View v) {//TODO auto-generated Method StubIntentfilter filter =NewIntentfilter ("Iflab.test.MY_ACTION"); Receiver=NewMyreceiver (); Registerreceiver (receiver, filter); //registering a broadcast receiver            }        }); Btn3.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {//TODO auto-generated Method StubUnregisterreceiver (receiver);//destroying broadcast receivers            }        }); }            }
 public  class  myreceiver extends   broadcastreceiver{@Override   Public  void  onreceive (Context arg0, Intent arg1) {//  overloaded OnReceive method  //  TODO auto-generated Method stub   String str;    str  = "The Received broadcast message is:" +arg1.getstringextra ("message"); //         Receive message         Toast.maketext (arg0, Str,toast.length_long). Show (); //  display   
  <receiver android:name= "Myreceiver" >            <intent-filter>            </intent-filter>        </ Receiver>
configuration file

3. Tips

Do not click Destroy broadcast receiver when not registered broadcast receiver will stop running is a small bug it is necessary for users to do some of their own

Android--Simple broadcast receive and send (2)--dynamic registration of broadcast receivers

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