android--start Broadcast (broadcast)

1. Define the broadcast component, and the component type inherits the Broadcastreceiver class:

Package Org.lxh.demo;import Android.content.broadcastreceiver;import Android.content.context;import Android.content.intent;import Android.widget.toast;public class Mybroadcastreceiverutil extends BroadcastReceiver { Public Mybroadcastreceiverutil () {       System.out.println ("* * * * * Each broadcast instantiates a new broadcast component for operation! ");} @Overridepublic void OnReceive (context context, Intent Intent) {//Note parameter Toast.maketext (context, "broadcast started", Toast.length_ LONG). Show ();}}

2.main.xml:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    android:o rientation= "vertical" >    <button        android:id= "@+id/mybtn"        android:layout_width= "Wrap_content"        android:layout_height= "wrap_content"        android:text= "Start broadcast"/></linearlayout>

3. Define the activity program to send the broadcast:

Package Org.lxh.demo;import Android.app.activity;import Android.app.alertdialog;import android.app.Dialog;import Android.content.dialoginterface;import Android.content.intent;import Android.os.bundle;import Android.view.View; Import Android.view.view.onclicklistener;import Android.view.view.onfocuschangelistener;import Android.widget.button;import Android.widget.edittext;import Android.widget.textview;public class Hello extends Activity {private Button mybtn = Null;public void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Life cycle Method Super.setcontentview (R.layout.main); Set the layout manager to use THIS.MYBTN = (Button) Super.findviewbyid (R.ID.MYBTN); This.mybtn.setOnClickListener (new Onclicklistenerimpl ());} Private class Onclicklistenerimpl implements Onclicklistener {public void OnClick (View arg0) {Intent it = new Intent (inten T.action_edit); Hello.this.sendBroadcast (it);}}}

4. Register the broadcast component in the Androidmanifest.xml file:

<?xml version= "1.0" encoding= "Utf-8"? ><manifest xmlns:android= "http://schemas.android.com/apk/res/ Android     package= "Org.lxh.demo"     android:versioncode= "1"     android:versionname= " 1.0 >    &LT;USES-SDK android:minsdkversion= "Ten"/>    <application      & nbsp android:icon= "@drawable/icon"         android:label= "@string/app_name" >        <activity            android:name= ". Hello "            android:label=" @string/app_name ">          &N Bsp <intent-filter>                <action android:name= " Android.intent.action.MAIN "/>                <category android:name=" Android.intent.category.LAUNCHER "/>            </intent-filter>        </activity>        <strong><span style= "color: #ff0000;" ><receiver            android:name= "Mybroadcastreceiverutil"       & nbsp     android:enabled= "true" >            <intent-filter>    &NB Sp           <action android:name= "Android.intent.action.EDIT"/>            </intent-filter>        </receiver></span></strong>  & nbsp </application></manifest>

5. Run the following example:

android--start Broadcast (broadcast)