Handler

private void counterTimer() {
                final Handler handler = new Handler();
                final TextView TvCounter = (TextView) findViewById(R.id.Tv_tys_Counter);
                final java.util.concurrent.atomic.AtomicInteger n = new AtomicInteger(3);
                final Context ThisContext = this;

                final Runnable counter = new Runnable() {
                        @Override
                        public void run() {

                                TvCounter.setText(Integer.toString(n.get()));
                                if (n.getAndDecrement() >= 1)
                                        handler.postDelayed(this, 1000);
                                else {
                                        TvCounter.setVisibility(View.GONE);
                                        Log.d(tag, "Inside the Else Method of counter");

                                        Intent calculate = new Intent(ThisContext, FourCalculation.class);
                                        calculate.putExtra("difficulty", mDifficulty);
                                        calculate.putExtra("questionType", mQuestions);
                                        startActivity(calculate);
                                }
                        }
                };
                handler.postDelayed(counter, 1000);

        }