Android broadcast Summary

Android broadcast Summary

1. The sendBroadcast method sends a broadcast.

Package com. example. android_broadcast_normal; import android. app. activity; import android. content. intent; import android. OS. bundle; import android. view. menu; import android. view. view; import android. view. view. onClickListener; import android. widget. button; public class MainActivity extends Activity {private Button btn; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); btn = (Button) this. findViewById (R. id. button1); // send broadcast btn. setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {Intent intent = new Intent (MainActivity. this, MyReceiver. class); sendBroadcast (intent) ;}}) ;}@ Overridepublic boolean onCreateOptionsMenu (Menu menu) {// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater (). inflate (R. menu. main, menu); return true ;}}

/*** Version: * author: YangQuanqing * Data: */package com. example. android_broadcast_normal; import android. annotation. suppressLint; import android. annotation. targetApi; import android. app. notification; import android. app. icationicationmanager; import android. content. broadcastReceiver; import android. content. context; import android. content. intent; import android. OS. build;/*** broadcast Life Cycle onReceive () from start to end * @ author YangQuanqing yqq **/@ SuppressLint ("NewApi ") public class MyReceiver extends BroadcastReceiver {// Notification management instance private icationicationmanager icationmanager; // create a Notification instance private Notification. builder builder; @ TargetApi (Build. VERSION_CODES.HONEYCOMB) @ Overridepublic void onReceive (Context context, Intent intent) {// TODO Auto-generated method stub // obtain icationicationmanager instance icationicationmanager = (icationicationmanager) context. getSystemService (Context. NOTIFICATION_SERVICE); // instantiate the instance builder that creates a Notification = new Notification. builder (context); // set the notification builder. setContentTitle ("SMS notification"); builder. setContentText ("hello"); builder. setSmallIcon (R. drawable. ic_launcher); // construct a notification icationicationmanager. policy (10086, builder. build ());}}

2. Send ordered Broadcast

Package com. example. android_brocast_order; import android. app. activity; import android. content. intent; import android. OS. bundle; import android. view. menu; import android. view. view; import android. view. view. onClickListener; import android. widget. button; public class MainActivity extends Activity {private Button btn1, btn2; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); btn1 = (Button) this. findViewById (R. id. button1); btn2 = (Button) this. findViewById (R. id. button2); btn1.setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {// broadcast Intent intent (); Intent. putExtra ("name", "Li Hua"); intent. setAction ("com. yqq. mutilBrocast "); sendBroadcast (intent) ;}}); // sends an ordered broadcast btn2.setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {// create Intent intent Intent = new intent (); Intent. putExtra ("name", "android"); intent. setAction ("com. yqq. mutilBrocast "); // send ordered broadcast sendOrderedBroadcast (intent, null) ;}}) ;}@ Overridepublic boolean onCreateOptionsMenu (Menu menu) {// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater (). inflate (R. menu. main, menu); return true ;}}

/*** Version: * author: YangQuanqing * Data: */package com. example. android_brocast_order; import android. content. broadcastReceiver; import android. content. context; import android. content. intent; import android. util. log;/*** @ author YangQuanqing yqq **/public class BroadCast1 extends BroadcastReceiver {@ Overridepublic void onReceive (Context context, Intent intent) {Log. I ("BroadCast1 <", intent. getStringExtra ("name"); // abortBroadcast (); // terminate broadcast }}

/*** Version: * author: YangQuanqing * Data: */package com. example. android_brocast_order; import android. content. broadcastReceiver; import android. content. context; import android. content. intent; import android. util. log;/*** @ author YangQuanqing yqq **/public class CopyOfBroadCast2 extends BroadcastReceiver {@ Overridepublic void onReceive (Context context, Intent intent) {Log. I ("BroadCast2 <", intent. getStringExtra ("name"); abortBroadcast (); // If the broadcast is not received when the ordered broadcast is terminated }}

/** *Version: *author:YangQuanqing *Data: */package com.example.android_brocast_order;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;/** * @author YangQuanqing yqq * */public class CopyOfBroadCast3 extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {Log.i("BroadCast3<<<", intent.getStringExtra("name"));}}

The following demo shows how to broadcast an application in actual development:

Package com. example. yqqmobilesafe. service; import java. util. list; import android. app. notification; import android. app. icationicationmanager; import android. app. pendingIntent; import android. app. service; import android. content. broadcastReceiver; import android. content. context; import android. content. intent; import android. content. intentFilter; import android. OS. asyncTask; import android. OS. IBinder; import android. telephony. smsMessage; import android. util. log; import com. example. yqqmobilesafe. rubishSmsActivity; import com. example. yqqmobilesafe. contactProvider. contactInfoProvider; import com. example. yqqmobilesafe. db. dao. rubishSmsInfoDao; import com. example. yqqmobilesafe. domain. contactInfo; import com. example. yqqmobilesafe. domain. rubishSmsInfo;/*** unfamiliar SMS interception Service * @ author yqq **/public class StopStrangerPhoneNumberSmsService extends Service {private boolean D = true; private StopStrangerSmsReceiver mReceiver; // stranger SMS interception broadcast receiver public StopStrangerPhoneNumberSmsService () {// TODO Auto-generated constructor stub} @ Overridepublic IBinder onBind (Intent intent) {// TODO Auto-generated method stubreturn null;} @ Overridepublic void onCreate () {if (D) {Log. I ("StopStrangerPhoneNumberSmsService", "onCreate ()");} // register the broadcast mer ER = new StopStrangerSmsReceiver (); IntentFilter filter = new IntentFilter (); filter. setPriority (Integer. MAX_VALUE); filter. addAction ("android. provider. telephony. SMS_RECEIVED "); registerReceiver (mReceiver, filter); super. onCreate () ;}@ Overridepublic int onStartCommand (Intent intent, int flags, int startId) {if (D) {Log. I ("StopStrangerPhoneNumberSmsService", "onStartCommand");} return super. onStartCommand (intent, flags, startId) ;}@ Overridepublic void onDestroy () {if (D) {Log. I ("StopStrangerPhoneNumberSmsService", "onDestroy ()");} // cancel the broadcast receiver unregisterReceiver (mterer); mReceiver = null; super. onDestroy ();} // The class StopStrangerSmsReceiver extends BroadcastReceiver {private String sender; // the sender's number is private String body; // SMS content @ Overridepublic void onReceive (Context context, Intent intent) {Object [] objs = (Object []) intent. getExtras (). get ("pdus"); for (Object obj: objs) {SmsMessage smsmsmessage = smsMessage. createFromPdu (byte []) obj); // obtain the message sender's number sender = smsMessage. getOriginatingAddress (); body = smsMessage. getMessageBody (); new AsyncTask
 
  
() {List
  
   
Infos = null; @ Overrideprotected Void doInBackground (Void... params) {ContactInfoProvider contactInfoProvider = new ContactInfoProvider (getApplicationContext (); infos = contactInfoProvider. getSystemContactInfos (); return null ;}@ Overrideprotected void onPostExecute (Void result) {if (infos = null) {// Toast. makeText (getApplicationContext (), duration) return ;}for (ContactInfo info: infos) {if (info. getPhoneNumber (). equals (sender) {return ;}} abortBroadcast (); new AsyncTask
   
    
() {@ Overrideprotected Void doInBackground (Void... params) {RubishSmsInfo sms = new RubishSmsInfo (); sms. setPhoneNumber (sender); sms. setSmsContent (body); // store stranger text messages in the database table RubishSmsInfoDao rubishSmsInfoDao = new RubishSmsInfoDao (getApplicationContext (); rubishSmsInfoDao. addSmsInfos (sms); return null ;}@ Overrideprotected void onPostExecute (Void result) {// TODO Auto-generated method stubsuper. onPostExecute (result); icationicationmanager nm = (icationicationmanager) getSystemService (NOTIFICATION_SERVICE); Intent intent = new Intent (StopStrangerPhoneNumberSmsService. this, RubishSmsActivity. class); PendingIntent pi = PendingIntent. getActivity (StopStrangerPhoneNumberSmsService. this, 0, intent, 0); // send an interception Notification notification Notification = new Notification. builder (getApplicationContext ()). setAutoCancel (true ). setTicker ("blocking strange text messages "). setSmallIcon (com. example. yqqmobilesafe. r. drawable. notif_icon_sms ). setContentText ("blocking strange text messages" ).setContentIntent(pi).build();nm.notify(100,notification);}}.execute();super.onPostExecute(result);}}.exe cute ();}}}}