Question

I have a Main-Activity which displays several spinners.
With a Toggle-Button in the Main-Activity I start a service which collects GPS-Data in background that measures the distance and sets some other variables.
When I stop the service with another click on the Toggle-Button in the Main-Activity, I stop the service, so the onDestroy() command is executed in the Service.
Within onDestroy in the Service, I want to submit the variables from the service to the already opened Main-Activity.
I tried that so far without success in the service:

    Intent intent = new Intent(this, Main.class);
    Bundle b = new Bundle();
    Test = 2222;
    b.putInt("Test", Test);
    intent.putExtras(b);

I do not use the “startActivity(intent);”, cause the activity that should the data send to is already open…the Main-Activity.

And on the side of the Main-Activity:

    Bundle b = getIntent().getExtras();
    if (b != null){ 
       Test = b.getInt("Test");
    }
    else{
       //..oops!
       Toast.makeText(Main.this, "Oops...Nothing from service! :(", Toast.LENGTH_SHORT).show();
    }

I never get data from the service.
I am trying this cause I need to start the service from the Main-Activity, from the Main activity the user stops the service and gets the values from it, then the Main-Activity should transmit the values from the service AND from the selected spinner values from itself to another activity.

I am trying that now for days and I also find some hints here, but nothing worked for me so far.
Someone any ideas?
Do I have to use a Broadcast-Receiver?
Whats the correct way to do this?

Answer 1

Before destroying the service store the data in shared preference and access it in the main activity