This gist shows how to solve Resources Not Found Exception especially when implementing CountDownTimer. I've explained about the exception in detail in my blog post http://gsrikar.blogspot.com/2017/01/resources-not-found-exception-in-android.html

Solves Resources Not Found Exception

new CountDownTimer(10000, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                Log.i(TAG, "Time in Milli until finished: " + millisUntilFinished);
                int remainingTimeInSec = (int) (millisUntilFinished / 1000);
                countDownTimeTextView.setText(String.valueOf(remainingTimeInSec));
            }

            @Override
            public void onFinish() {
                Log.i(TAG, "On Finish called");
                countDownTimeTextView.setText(String.valueOf(0));
            }
        }.start();