Run Countdown Timer in fragment and in background

Question

I am trying to run a countdown timer in a fragment. I have been able to achieve this but I can't seem to run it in background. How would I do this? Using a service requires onStart and onStop but these methods don't apply to fragments. What do I do?

look at this answer there should be few examples: https://stackoverflow.com/a/10032406/8187578 — Kebab Krabby, Aug 16 '18 at 11:09
The timer should run in the background even if the app is closed or destroyed — Android Programming Tutorials, Aug 16 '18 at 11:15

score 0 · Answer 1 · answered Aug 16 '18 at 11:05

In you need the countdown only when UI is visible you could use RxJava for example.

Disposable timer = Observable.interval(1, TimeUnit.SECONDS)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.computation())
                .subscribe(aLong -> {
                    // tick;
                });

Don't forget to dispose when timer is not use anymore

if (timer.isDisposed()) timer.dispose();

Or you can use Observable.intervalRange(...) to fire event specific number of times.

Or check this topic Run loop every second java to understand the Thread implementation in details.

This is not the answer to my question – Android Programming Tutorials Aug 16 '18 at 11:25 — Android Programming Tutorials, Aug 16 '18 at 11:25

Run Countdown Timer in fragment and in background

1 Answers1