how to make program read timer and then print statement in another textview box when time reaches that second

I am using android studio(java) and I want my time to print some text when the time reaches one minute, my current code is;

I want to make a stopwatch. when my stopwatch reaches 1 minute I want it to print a statement, how can i make it do this?

Button btnStart,btnPause,btnLap;
TextView txtTimer;
Handler customHandler = new Handler();
LinearLayout container;
TextView lt;

long startTime=0L,timeinMilliseconds=0L,timeSwapBuff=0L,updateTime=0L;

Runnable updateTimerThread = new Runnable() {
    @Override
    public void run() {
        timeinMilliseconds =  SystemClock.uptimeMillis() -startTime;
        updateTime = timeSwapBuff+timeinMilliseconds;
        int secs=(int) (updateTime/1000);
        int mins=secs/60;
        secs%=60;
        int milliseconds=(int) (updateTime%1000);
        String s = "" + mins + ":" + String.format("%02d",secs) + ":" +          
String.format("%03d",milliseconds);
        txtTimer.setText (s);
        customHandler.postDelayed(this,0);