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You are here: Home / Android syllabus Topics Course details / Service

Service

Service: Service is an Android component that runs in the background continues to perform long-running operations, network-based operations.
Ex: Playing music
Downloading file

Service runs in the background indefinitely even
if the application is closed.

The lifecycle of a Service:
Services are 2 types.
1) Started
2) Bound

Started Service:
A service is said to be started when a component like Activity calls startService() method. Once it is started, it runs continuously in the background. It can be stopped by stopService() method. Also, the service can stop itself by calling the stopSelf() method of Service.

Bound Service:
A service is bound when a component like Activity calls bindService() method. Once they are bound, data can be passed from service to activity. The client can unbind the service by calling unbindService() method.

 

 

Steps to create a Service:
1) Create a subclass of service
2) override onStartCommand method for started service, onBind method for bound service

Ex:
public class MyService extends Service {
private MediaPlayer mp;
@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
mp = MediaPlayer.create(this, R.raw.baazigar_o_baazigar);
mp.start();
return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
super.onDestroy();
mp.stop();
}
}

To register the service in manifest inside <application> tag
<service android:name=”.MyService”/>

To start the above Service from Activity:
Intent i = new Intent(this, MyService.class);
startService(i);

To stop the above Service from Activity:
Intent i = new Intent(this, MyService.class);
stopService(i);

Create an Android application to work with Service
Find the source in https://tinyurl.com/latest7am






Android syllabus Topics Course details

  • Options Menu
  • JSON parsing
  • Handling Views
  • RelativeLayout
  • ActionBar
  • ListView
  • Custom List View
  • Dialogs
  • AlarmManager
  • Notifications
  • Vibration
  • WebView
  • Fragments Runtime
  • SQLiteDatabase
  • Bluetooth
  • WiFi
  • Google Maps
  • Handling Activity Back Button
  • AsyncTask
  • Runtime Permissions
  • Logging
  • Activity Lifecycle
  • Toast
  • Service
  • Database with Cursor Adapter
  • SharedPreferences
  • Location
  • Libraries
  • Webservices
  • Creating Activity class
  • Creating XML
  • Registering Activity in AndroidManifest.xml:
  • Steps for creating an Android application:
  • Handling button clicks
  • Identifying Views
  • Getting Text from Views
  • intent with Data
  • Intent
  • Resources Handling in Android
  • Intent with Result Data
  • Broad cast Receiver
  • Fragment
  • Handling Button click by using On Click Listener:
  • Material Design
  • RecyclerView
  • JSON
  • Rename Android Package [with images 2018]

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