Updating a textView value every 3 secs

Question

I'm using listItems array which contains checkboxes every checked item is saved in mUserItems array I want to print every checked item separated in mItemSeleced textView for 3 seconds using a countdown timer then delete it and get the other item for 3 seconds and so on; the problem is after 3 seconds I only get the last item checked

public void onClick(DialogInterface dialogInterface, int which) {
    for (int i = 0; i < mUserItems.size(); i++) {
        final int j = i;
        new CountDownTimer(3000, 1000) {
            public void onTick(long millisUntilFinished) {}
            public void onFinish() {
                mItemSelected.setText("");
                mItemSelected.setText(listItems[mUserItems.get(j)]);
            }
        }.start();
    }
}

Your loop will start all count downs at once (almost). You should use recursion here. Also consider using Handler.postDelayed https://stackoverflow.com/questions/3072173/how-to-call-a-method-after-a-delay-in-android — Dmitrii Leonov, Dec 15 '19 at 15:06
Did you see the message that causes crash? I believe it can be that you are updating UI not on the main Thread — Dmitrii Leonov, Dec 15 '19 at 23:23
I just replaced the for loop wirh a recursion loop in the main thread, i think it is a logical error but i don not know ehat is it — user12540737, Dec 19 '19 at 08:30

score 0 · Answer 1 · answered Dec 15 '19 at 18:39

0

If you use loop or recursion, try using

delay(3000); after the updating statement (then loop continues)!

answered Dec 15 '19 at 18:39

Sakib Hasan

31
8

Updating a textView value every 3 secs

1 Answers1