CODEWITHSUNDEEP
androidandroid-activityservice
Xenione
Xenione

Reputation: 2213

communication service and Activity through global variable

Hi I have a service running and fetch location every 30 seconds (as it showns in code(1)) I want to store location to be available at anytime my aproach is to store as a global variable within the application context (as it showns in code(2) and code(1)) so, later I can get it from MainActivity as shown in code(3).

code (1)

 public class LocationService extends Service{

 @Override
 public void onCreate(){

 // I have a service here from where I can get Location every 30 secs
  {
   Location location=// from android api get Location every 30 secs
  ((App)getApplication()).setLocation(location);
  }
 }

}

(2)

public class App extends Application{
Location mLocation;

public void setLocation(Location location){
  mLocation=location;
 }

public Location getLocation(){
  return mLocation;
 }

(3)

 public class MainActivity extends Activity{
 @Override
 public void onCreate(){
 Location location=((App)getApplication()).getLocation();
 }

}

My Question is that aproach valid?. I saw that usually is used either broadcast or bind service and activity, I have never seen to share gloabal variable between service and activity, ¿why?.

Any discussion is wellcome.

Upvotes: 1

Views: 78

Answers (1)

Sadegh
Sadegh

Reputation: 2669

You approach is a valid one. according to the android developer site you have the following options:

  • put data inside an intent
  • singleton class
  • a public static field/method
  • a HashMap or WeakReferences to Objects
  • use sharedPreferences
  • put into the database

Each one of these approaches depends on the situation. In my opinion it is better to store the location in a static field, and expose a static getter method for that field in your Service.

Upvotes: 1

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