public class MainActivity extends Activity implements OnClickListener
{/*** 待完善*/private Chronometer chronometer = null;private long temp;private boolean isrestart;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);chronometer  = (Chronometer) findViewById(R.id.chronometer1);findViewById(R.id.button1).setOnClickListener(this);findViewById(R.id.button2).setOnClickListener(this);findViewById(R.id.button3).setOnClickListener(this);findViewById(R.id.button4).setOnClickListener(this);findViewById(R.id.button5).setOnClickListener(this);}@Overridepublic boolean onCreateOptionsMenu(Menu menu){getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic void onClick(View v){switch (v.getId()){case R.id.button1:btnStartClock();break;case R.id.button2:btnStopClock();break;case R.id.button3:btnResetClock();break;case R.id.button4:btnSetformat();break;case R.id.button5:btnClearformat();break;default:break;}}private void btnClearformat()//清除格式{chronometer.setFormat(null); }private void btnSetformat()//设置格式{chronometer.setFormat("计时：%s");  //设置计时格式，第一个%s将被hh:mm:ss或者mm:ss代替}private void btnResetClock()//重置时间{isrestart = true;chronometer.setBase(SystemClock.elapsedRealtime());//设置计时基准时间Log.e("setBase", SystemClock.elapsedRealtime()+"");}private void btnStopClock()//停止计时{chronometer.stop();//记住停止时间temp = Long.parseLong(chronometer.getText().toString().split(":")[1]) * 1000 +Long.parseLong(chronometer.getText().toString().split(":")[0]) * 60000;//chronometer.getBase();Log.e("getBase", chronometer.getBase()+"");Log.e("getBase", temp+"");}private void btnStartClock()//开始计时{chronometer.setBase(SystemClock.elapsedRealtime()-temp);//从上次停止时间开始计时chronometer.start();Log.e("getBase", chronometer.getBase()+"");}}