Stopwatch class?

Question

Java

I am writing an application in which there are 2 stopwatches and the corresponding start / stop / pause, what class should I use for the stopwatch?

Answer 1

package com.navikolus.timerExample;

import android.os.Bundle;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Chronometer;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Chronometer mChronometer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mChronometer = (Chronometer) findViewById(R.id.chronometer);

        mChronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
            @Override
            public void onChronometerTick(Chronometer chronometer) {
                long elapsedMillis = SystemClock.elapsedRealtime()
                        - mChronometer.getBase();

                if (elapsedMillis > 5000) {
                    String strElapsedMillis = "Прошло больше 5 секунд";
                    Toast.makeText(getApplicationContext(),
                            strElapsedMillis, Toast.LENGTH_SHORT)
                            .show();
                }
            }
        });
    }

    public void onStartClick(View view) {
        mChronometer.setBase(SystemClock.elapsedRealtime());
        mChronometer.start();
    }

    public void onStopClick(View view) {
        mChronometer.stop();
    }

    public void onResetClick(View view) {
        mChronometer.setBase(SystemClock.elapsedRealtime());
    }
}