Stop Watch in Android with Chronometer

Divide the time into the minute , hour and second using setOnChronometerTickListener.

use this ......

Chronometer chrono  = (Chronometer) findViewById(R.id.chronomete);
chrono.setOnChronometerTickListener(new OnChronometerTickListener(){
        @Override
            public void onChronometerTick(Chronometer chronometer) {
            long time = SystemClock.elapsedRealtime() - chronometer.getBase();
            int h   = (int)(time /3600000);
            int m = (int)(time - h*3600000)/60000;
            int s= (int)(time - h*3600000- m*60000)/1000 ;
            String t = (h < 10 ? "0"+h: h)+":"+(m < 10 ? "0"+m: m)+":"+ (s < 10 ? "0"+s: s);
            chronometer.setText(t);
        }
    });
    chrono.setBase(SystemClock.elapsedRealtime());
    chrono.setText("00:00:00");

EDIT

For Start

Declare globally a long variable timeWhenStopped . It is to maintain time.

private long timeWhenStopped = 0;

Start Listener... get the 'timeWhenStopped' and start from there.

 start.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            chrono.setBase(SystemClock.elapsedRealtime() + timeWhenStopped);
            chrono.start();
        }
    }); 

Stop Listener.... store the time in timeWhenStopped and stop.

stop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            timeWhenStopped = chrono.getBase() - SystemClock.elapsedRealtime();
            chrono.stop();

        }
    });

That is all. If any help related to this post please comment.

Thank you, guys.

Enjoy coding.