long tiempo = 1;

        CountDownTimer timer = new CountDownTimer(tiempo * 60 * 1000, 100) {
            @Override
            public void onTick(long millisUntilFinished) {
            }

            @Override
            public void onFinish() {
                CountDownTimer timer2 = new CountDownTimer(1 * 60 * 1000, 100) {
                    @Override
                    public void onTick(long millisUntilFinished) {
                        contador.setText(getResources().getString(R.string.time_remaining) +
                                " " + String.valueOf(millisUntilFinished / 1000));
                    }

                    @Override
                    public void onFinish() {
                        finish();
                    }
                };
                timer2.start();
            }
        };
        timer.start();