tutor i el android broadcast receiver

7/28/2019 Tutor i El Android Broadcast Receiver

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TutorielAndroid

Communicationentreservices

BroadCastReceiverRomainRaveaux

Prambule.................................................................................................................................1

Prrequis...................................................................................................................................2

Architecture...............................................................................................................................3

EnvoidunmessageauServiceS1..........................................................................................5

Miseenuvre..........................................................................................................................6

ModificationduManifest......................................................................................................7

Lesclassesdututorial................................................................................................................8ClasseServiceS1.....................................................................................................................9

ClasseServiceS2...................................................................................................................11

ClasseTutoActivity..............................................................................................................13

Manifestdelapplication.....................................................................................................15

Prambule

LesservicesnepeuventpascommuniquerparlebiaisdelinterfaceIBinder.LacommunicationparIBindernepermetquelacommunicationentreuneActivityetun

service.LasolutionpourrsoudreleproblmeestdutiliserlesBroadCastReceiver

ServiceS1 ServiceS2message


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PrrequisSavoirdmarreretarrterunservice.

SavoircreruneapplicationAndroid.


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ArchitectureOncreunserviceServiceS1avecdeuxvariables:Unedonneenvoyeretunevariable

pourrecevoirunmessage.

publicclass ServiceS1 extends Service {String datatosend ="ping";

String receiveddata;

@Overridepublic IBinder onBind(Intent arg0) {// TODO Auto-generated method stubreturnnull;

}

/**

* @param args*/publicstaticvoid main(String[] args) {

// TODO Auto-generated method stub}

A lintrieur de la classe ServiceS1 , on cre une classe

BroadCastReceiver.

publicclass S1Receiver extends BroadcastReceiver {@Overridepublicvoid onReceive(Context context, Intent arg1) {

// TODO Auto-generated method stubToast.makeText(context, "reu !!!"

,Toast.LENGTH_LONG ).show();

Log.d(this.getClass().getName(), "reu !!!");receiveddata = arg1.getExtras().getString("id");Toast.makeText(context, receiveddata

,Toast.LENGTH_LONG ).show();

}

}

}


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OncreleconstructeurduserviceServiceS1 . La variable messageReceiver

estuneinstancedeS1Receiver. Il faut enregistrer le S1Receiver pour

avertir lapplication que le service ServiceS1 possde un BroadCast

Receiver qui pourra tre appel par dautres services.

MESSAGE_S1 est lidentifiant du BroadCast Receiver S1Receiver.

S1Receiver messageReceiver;publicstatic String MESSAGE_S1 = "MESSAGE_S1";public ServiceS1(){

super() ;

messageReceiver = new S1Receiver();registerReceiver(messageReceiver, new

IntentFilter(MESSAGE_S1));

}


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EnvoidunmessageauServiceS1

Pourillustrerlacommunicationentredeuxservices,nousavonsbesoindedeuxservices.

On cre un autre service ServiceS2 .

publicclass ServiceS2 extends Service {String datatosend ="pong";



}

/**



}

LorsdudmarrageduserviceS2,cedernierenverraunmessageauserviceS1.

LeserviceS2envoieparlebiaisdelamthodesendBroadcastunIntentcontenantla

variabledatatosend.

Intent sender = new Intent(ServiceS1.MESSAGE_S1);sender.putExtra("id", datatosend);

sendBroadcast(sender);


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MiseenuvreLesservicessexcutententchedefonddemanireparallle.

Pourexprimenternotrecommunicationentreservicesnousavonsbesoinduneactivit

avecunboutonpermettantdedmarrerlesservices.

Dmarragedelactivit

Dmarragedu

serviceS1

Dmarragedu

serviceS2

EnvoidumessageaS1

Miseenplacedu

BroadCastReceiver

Rceptiondu

message

temps


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VoicilecodedelamthodeonCreatedelactivit.Lorsdelappuiesurunbouton,on

dmarreleserviceS1etleserviceS2.

@Overridepublicvoid onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.tutolayout);

start = (Button) this.findViewById(R.id.button1);start.setOnClickListener(new Button.OnClickListener(){

@Override

publicvoid onClick(View v) {// TODO Auto-generated method stub

Intent starter = newIntent(TutoActivity.this,ServiceS1.class);

startService(starter);

starter = newIntent(TutoActivity.this,ServiceS2.class);


}

});

}

ModificationduManifest

Danslemanifestdelapplication,ilfautrajouterladclarationdesservicesentrelesbalises

application.


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Lesclassesdututorial


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ClasseServiceS1

packagecom.example.carteauxtresors.services;

importcom.example.carteauxtresors.services.Ordonnanceur.MyReceiver;

importandroid.app.Service;

importandroid.content.BroadcastReceiver;

importandroid.content.Context;

importandroid.content.Intent;

importandroid.content.IntentFilter;

importandroid.os.IBinder;

importandroid.util.Log;

importandroid.widget.Toast;

publicclassServiceS1extendsService{

Stringdatatosend="ping";

Stringreceiveddata;

S1ReceivermessageReceiver;

publicstaticStringMESSAGE_S1="MESSAGE_S1";

publicServiceS1(){

super();

}

@Override

publicintonStartCommand(Intentintent,intflags,intstartId){

Log.d(this.getClass().getName(),"onStart");

Log.d("LocalService","Receivedstartid"+startId+":"+intent);

messageReceiver=newS1Receiver();

registerReceiver(messageReceiver,newIntentFilter(MESSAGE_S1));

returnSTART_NOT_STICKY;

}

@Override

publicIBinderonBind(Intentarg0){

//TODOAuto-generatedmethodstub

returnnull;

}

/**

*@paramargs

*/ publicstaticvoidmain(String[]args){


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}

publicclassS1ReceiverextendsBroadcastReceiver{

@Override

publicvoidonReceive(Contextcontext,Intentarg1){


Toast.makeText(context,"S1reu!!!",Toast.LENGTH_LONG).show();

Log.d(this.getClass().getName(),"S1reu!!!");

receiveddata=arg1.getExtras().getString("id");

Toast.makeText(context,receiveddata,Toast.LENGTH_LONG).show();

}

}

@Override

publicvoidonDestroy(){

Log.d(this.getClass().getName(),"onDestroy");

unregisterReceiver(messageReceiver);

}

}


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ClasseServiceS2

package com.example.carteauxtresors.services;import android.app.Service;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.IBinder;import android.util.Log;import android.widget.Toast;publicclass ServiceS2 extends Service {

String datatosend ="pong";


public ServiceS2(){super();}

@Overridepublicint onStartCommand(Intent intent, int flags, intstartId) {

Log.d(this.getClass().getName(), "onStart");Log.d("LocalService", "Received start id " + startId + ":

" + intent);

Intent sender = new Intent(ServiceS1.MESSAGE_S1);sender.putExtra("id", datatosend);

sendBroadcast(sender);

returnSTART_NOT_STICKY;}


}

/**


// TODO Auto-generated method stub


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}

@Override

publicvoid onDestroy() {Log.d(this.getClass().getName(), "onDestroy");

}

}


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ClasseTutoActivity

package com.example.carteauxtresors;import com.example.carteauxtresors.services.Ordonnanceur;import com.example.carteauxtresors.services.ServiceS1;import com.example.carteauxtresors.services.ServiceS2;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;publicclass TutoActivity extends Activity {

/**



private Button start;@Overridepublicvoid onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);

setContentView(R.layout.tutolayout);

start = (Button) this.findViewById(R.id.button1);start.setOnClickListener(new Button.OnClickListener(){

@Overridepublicvoid onClick(View v) {// TODO Auto-generated method stub

Intent starter = newIntent(TutoActivity.this,ServiceS1.class);


starter = newIntent(TutoActivity.this,ServiceS2.class);



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}

});

}

}


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Manifestdelapplication

tutor i el android broadcast receiver

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