Countdown Text Builder

CoundowTextBuilder.java

StringBuilder sb = new StringBuilder();
if (secondsRemaining >= 3600) { // over and hour
    long hours = secondsRemaining / 3600;
    secondsRemaining %= 3600;
    sb.append(hours);
    sb.append(":");
    if (secondsRemaining < 60) {
        sb.append("00:"); // we will skip the minutes stuff, so add it here.
    }
}
if (secondsRemaining >= 60) { // over a minute
    long minutes = secondsRemaining / 60;
    secondsRemaining %= 60;
    if (minutes > 9) {
        sb.append(minutes);
    } else {
        sb.append(0).append(minutes);
    }
    sb.append(":");
}
if (secondsRemaining >= 0) {
    if (secondsRemaining > 9) {
        sb.append(secondsRemaining);
    } else {
        sb.append(0).append(secondsRemaining);
    }
}
timerTextView.setText(sb.toString());