How can I send data from a Service to an Activity? Broadcast receiver? Handlers? Intent? I have several Strings in particular that I would like to send from Service to an Activity, so that I can then display some View to the user.
getApplication().startActivity(new Intent()) ?
Since both Activity & Service is in same application. Instead of going for Service Binder IPC, try implementing register callBack mechanism. Try follow below step. -> Make a static class which extends from class Application to make quick reference anywhere in your application. -> Register a callBack from Activity to this application class. -> Post event from your service to the application class and let Application class deliver the event to all register callBacks.
As @justin-shield mentioned the best way is to use some form of IPC. I don't think you need to use AIDL, however. You can see another answer I gave to a similar question that outlines the basic steps to register Handlers and Messengers in your Activity and your Service.
I think all your answers are way more complex than what I need. I think I have come up with a rather simple solution (psuedo-code):
Service:
Intent i = new Intent(this,Activity.class);
i.putExtra(name,value);
startActivity(i);
Activty:
private Intent intent;
private String s1;
from the
onCreate(Bundle savedInstanceState)
{
super(savedInstanceState);
intent = this.getIntent(); //Gets the intent that started this Activity.
s1=intent.getExtras().getString(name);
}
Would I use same code in onStart() ? What about onResume() ? onRestart() ? Lastly, I only want to send to the Activity some data to publish via some View objects, I don't need any communication going back to the Service.