Android--Simple broadcast receive and send (1)

1.

2. Implementing the Code

Layout.xml

<button        android:id= "@+id/testbtn"        android:layout_width= "match_parent"        android:layout_height= " Wrap_content "        android:text=" @string/hello_world "/>

Mainactivity.java

public static final String my_action = "Iflab.test.MY_ACTION"; Custom Actionprivate Button testbtn; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (r.layout.activity_main); testbtn = (Button) Findviewbyid (R.ID.TESTBTN); Testbtn.setonclicklistener (New Onclicklistener () {@Overridepublic void OnClick (View v) {//TODO auto-generated method Stubintent Intent = new Intent (); intent.setaction (my_action); Intent.putextra ("message", "Messages from broadcast!") "); Set the broadcast message sendbroadcast (intent);}});}

Testbroadcastreceiver.java

public class Testbroadcastreceiver extends Broadcastreceiver {//Context object Intent received intent object @overridepublic void onrecei ve (context context, Intent Intent) {//TODO auto-generated method Stubstring Str;str = "received broadcast message:" + intent.getstringextr A ("message"); Receive Message Toast.maketext (context, str, toast.length_short). Show ();}}

Information to fill in the configuration file

<receiver android:name= "Testbroadcastreceiver" >            <intent-filter>                <action android:name= " Iflab.test.MY_ACTION "/>            </intent-filter>        </receiver>

3. Description

<action android:name= "Iflab.test.MY_ACTION"/>  is the constant you define in mainactivity

<receiver android:name= "Testbroadcastreceiver" >   name is the class that you start when you want to receive the broadcast  Testbroadcastreceiver

Android--Simple broadcast receive and send (1)