When writing :
CountDownTimer timer = new CountDownTimer(1000, 100)
{
@Override
public void onTick(long l)
{
}
@Override
public void onFinish()
{
};
}.start();
are we actually starting a new thread that handles ticks? If not, what is really happening?
Answer
CountDownTimer's implementation uses Handler and sendMessageDelayed(), so no background thread is needed. This does mean that the timer will not update if you are tying up the main application thread elsewhere in your code.