Broadcast receiver document

Android CourseObjectives • After completing this module, you will able to: • Create Broadcast Intent.. • Broadcast messages between components with the sendBroadcast method.. • Listen to

Android Course

Objectives

• After completing this module, you will able to:

• Create Broadcast Intent.

• Broadcast messages between components with the sendBroadcast method.

• Listen to user Broadcast Intent.

• Listen to Native Broadcast.

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Android Course

Using Broadcast Intent to send broadcast

Intent i = new Intent();

i.setAction( "com.btloc.android.demo.simplebroadcast" );

i.putExtra( "MESSAGE_KEY" , "Simple message" );

sendBroadcast(i);

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Android Course

Broadcast Receivers

• Listen to Broadcast Intents.

• Must be registered (either in code or within the application manifest).

• Use Intent Filter to specify which Intents it is listening for.

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Android Course

Listening to Broadcast Intent

@Override

// TODO Auto-generated method stub

String msg = intent.getStringExtra( "MESSAGE_KEY" );

Log.d( "onReceive" , msg);

} }

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Android Course

Registering Broadcast Intent in code

Android Course

Native Broadcast

• ACTION_CAMERA_BUTTON – The camera button has been pushed.

• ACTION_TIMEZONE_CHANGED - The setting for the time zone has changed.

• ACTION_BOOT_COMPLETED – The boot progress has been completed

• ACTION_BATTERY_LOW - A warning that the battery is low.

• ACTION_HEADSET_PLUG - A headset has been plugged into the device, or unplugged from it.

• ACTION_SCREEN_ON - The screen has been turned on.

•

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Android Course

Case Study for Native Broadcast

• Call Blocker Application

• Using android.intent.action.PHONE_STATE

• SMS blocker Applcation

• Using android.provider.Telephony.SMS_RECEIVED

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Context context = null ;

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Log.d( TAG , "Receving " );

TelephonyManager telephony = (TelephonyManager) context getSystemService(Context TELEPHONY_SERVICE );

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telephonyService = (ITelephony) m.invoke(telephony);

for (int i = 0; i < blockedNumbers.length; i++){

e.printStackTrace();

} }

}

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package name must be com.android.internal.telephony FileName : ITelephony.aidl

Android Course

SMSBlocker App – Step 1: Define SMSReceiver

SmsMessage.createFromPdu(( byte []) pdus[0]);

String phoneNumber = msg.getOriginatingAddress();

abortBroadcast();

} }

} } }

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Android Course

Questions or Discussions

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Android Course

References & Further Readings

• Intents and Intent Filters:

• http://

developer.android.com/guide/topics/intents/intents-filters.html

• Android App Course:

• Intents, Intent Filters, Broadcasts, Broadcast Receivers:

• http:// sites.google.com/site/androidcoursearchive/lectures

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Android Course

References & Further readings

• Professional Android 2 Application Development , Reto

Meier, Wiley Publishing (2010)

• Intents, Broadcast Receivers, Adapters, and the Internet , Chapter 5

• Map, Geocoding, and Location-based Services , Chapter 8

• Working in the background , Chapter 9

• Telephony and SMS , Chapter 12

• Bluetooh, Network, and Wi-fi , Chapter 13

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Android Course

References & Further Readings

• Android™ Wireless Application Development Second Edition , Shane

Conder, Lauren Darcey,

Addison-Wesley Professional Publishing (2010)

• Using SMS , Chapter 16

• Working with Wi-Fi , Chapter 19

• Monitoring the Battery , Chapter 19

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Android Course

References & Further Readings

• Android in Practice 1 Edition ,

Charlie Collins, Michael D Galpin, and Matthias Kaeppler, Manning

Android Course

References & Further Readings

• Pro Android 3 , Mark Murphy,

Apress Publishing (2011)

• Building and Consuming Services , Chapter 11

• Exploring Handlers , Chapter 13

• Broadcast Receivers and Running Services , Chapter 14

Long-• Exploring the Alarm Manager , Chapter 15

• Exploring Maps and based Services , Chapter 17

Location-• Using the Telephony APIs , Chapter 18

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Android Course

References & Further Readings

• Learning Android , Marko

Gargenta, O'Reilly Media

Publishing (2011)

• Broadcast Receivers , Chapter 11

• System Services , Chapter 13

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