android handler delay for loop

Question

I'd like to use handler.postDelayed instead of Thread.sleep() in a loop. Basically I have a sequence of numbers in a string and for each number I need a different delay to do an specific action.

hThread = new HandlerThread("HandlerThread");

    seqRunnable = new Runnable() {
        @Override
        public void run() {

            for (int i = 0; i < seq.length() ; i++) {

                    if (seq.charAt(i) == '0') {
                        Log.d(TAG, "seqCode: 0");

                        try {
                            Thread.sleep(1200);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                    }
                    if (seq.charAt(i) == '1') {
                        Log.d(TAG, "seqCode: 1");

                        try {
                            Thread.sleep(400);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    if (seq.charAt(i) == '2') {
                        Log.d(TAG, "seqCode: 2");

                        try {
                            Thread.sleep(1200);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                    }

                    try {
                        Thread.sleep(400);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }


            }

            if (hThread != null && hThread.isAlive())
                seqHandler.postDelayed(seqRunnable, 2400);
            Log.d(TAG, "seqCode done!");
        }
    };

While using Thread.sleep() works, I guess using a handler.postDelayed() is the preferred way but the timings when I use it are all wrong.

Any help would be much appreciated.

oh I simply use it elsewhere in my code, it's not really relevant with my problem at the moment.. — Ioannis Panteleakis, Sep 27 '15 at 11:56
ok, so back to your question: dont use Thread.sleep, use Handler instead — pskink, Sep 27 '15 at 12:01
That's what I'd like to do, I just don't know how to do it exactly as whatever I tried, I get weird timing results when using a handler eg like: handler.postDelayed(this, 1000); — Ioannis Panteleakis, Sep 27 '15 at 12:16
it just works: the `Runnable#run` will be called after 1000ms — pskink, Sep 27 '15 at 12:29
I actually fixed it. The problem was that I was calling the handler multiple times in the for loop and it was causing the timing problems I mentioned before. Basically it was more an algorithmic logic issue. — Ioannis Panteleakis, Sep 27 '15 at 22:58

android handler delay for loop

0 Answers0