DebugModeTapListener.java

private class DebugModeTapListener implements View.OnClickListener {
  private int tapCount = 0;
  private long lastTap = SystemClock.elapsedRealtime();

  @Override
  public void onClick(final View v) {
    final Context context = getApplicationContext();

    long currentTap = SystemClock.elapsedRealtime();
    if (currentTap - lastTap < 500) {
      tapCount++;
    } else {
      tapCount = 1;
    }
    lastTap = currentTap;

    if (tapCount > 10) {
      // User has tapped 10 times in 5 seconds
      Toast.makeText(context, "No peeking! ;-)", Toast.LENGTH_SHORT)
    }
  }
}