Tools - Runnable Example

void startTime(){

handler.postDelayed(runnable, 1000);
}
int totalDelay=0;
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
totalDelay++;
if(totalDelay<=20){
handler.postDelayed(runnable, 1000);
}
textview1.setText(totalDelay+" Second");
}
};