How to change a java timer's interval

Question

I'm working on an android Tetris game. And an IllegalStateException occurred when executing

timer.scheduleAtFixedRate (task, 0L, milliseconds);

in

public void setTimerInterval (int milliseconds) {
    timer.cancel ();
    timer = new Timer ();
    timer.scheduleAtFixedRate (task, 0L, milliseconds);
}

Am I doing this wrongly or something? I need to cancel the timer and create a new one because I cannot change the interval of the timer unless you schedule a new task for it, right?

I read a post here and here is a quote of one of the answers:

A timer can only be scheduled once. If IllegalStateException isn't happening when you call cancel(), but when you try to reschedule the timer, just reinstantiate the timer and then schedule it. Otherwise, I'm not sure.

I didn't use the accepted answer of the that question because it's about pausing and resuming the timer.

I reinstantiated the timer as shown above but there is still a IllegalStateException.

I didn't provide a stack trace because I don't know how to do it in the question editor. Can anyone help me? — Sweeper, Jul 20 '15 at 09:16

score 1 · Accepted Answer · edited Jul 20 '15 at 11:19

1

Handler handler = new Handler();
handler.post(new Runnable() {

    @Override
    public void run() {
        // do the task here
        handler.postDelayed(this, milliseconds); // set time here to refresh textView
    }
});

Make the milliseconds global and change that, maybe that would be a better solution.

edited Jul 20 '15 at 11:19

Ian2thedv

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answered Jul 20 '15 at 09:26

R. Adang

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You mean adding this to the setTimerInterval method? But milliseonds is a parameter, how can I make that global? – Sweeper Jul 20 '15 at 09:48
i mean using this instead of a timer. with the post delayed you can run a task after X milliseconds – R. Adang Jul 20 '15 at 10:00
Oh, ok. I'll try that. Thanks! – Sweeper Jul 20 '15 at 10:04
Hope it's a solution for your problem. Let know when your done – R. Adang Jul 20 '15 at 10:11

score 0 · Answer 2 · answered Jul 20 '15 at 10:16

0

How to change a java timer's interval

Java Timers don't have intervals. Timer tasks have intervals.

Solution: cancel and reschedule the TimerTask, not the Timer.

answered Jul 20 '15 at 10:16

user207421

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How to change a java timer's interval

2 Answers2

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