Question

I have a service which has a method that downloads an image from an URL and returns an Uri.
That service will get more complex when it has all the intended features. Therefore,
I’m invoking its methods within a thread.

My problem is how to warn the activity that the service has done it’s work.

I could change a class isFinished variable but the activity had to be constantly checking
for its value.

I just want the service to tell the activity that it’s work is done and the resources are
available for use.

I thought something in the lines of the service calling stopSelf() and the activity was
warned through “onServiceDisconnected” but that didn’t seem very “political correct”.

Thanks in advance

Answer 1

public class MyActivity extends Activity{

    public MyActivity() {
        ...
        MyThread thread = new MyThread(this);
        thread.start();
    }

    public void onFinishedThread(...) {

    }
}

class MyThread extends Thread {

    MyActivity activity;

    public MyThread(MyActivity activity) {
        this.activity = activity;
    }

    public void run() {
        // do work
        ...
        this.activity.onFinishedThread(...);
    }
}