使用CounterDownTimer实现时分秒倒计时

   使用android提供的android.os包中的 counterDownTimer可以很方便的实现倒计时功能，具体如下:

   

import android.os.CountDownTimer;



public class Couterdown extends CountDownTimer {



    public Couterdown(long millisInFuture, long countDownInterval) {

        super(millisInFuture, countDownInterval);

        // TODO Auto-generated constructor stub

    }



    @Override

    public void onFinish() {

        // TODO Auto-generated method stub

        

    }



    @Override

    public void onTick(long arg0) {

        

        

    }

    public String  toClock(long millisUntilFinished)

    

    {

        long hour = millisUntilFinished/(60*60*1000);

        long minute = (millisUntilFinished - hour*60*60*1000)/(60*1000);

        long second = (millisUntilFinished - hour*60*60*1000   - minute*60*1000)/1000;

        if(second >= 60 )

        {

          second = second % 60;

          minute+=second/60;

        }

        if(minute >= 60)

        {

          minute = minute %60;

          hour += minute/60;

        }

        String sh = "";

        String sm ="";

        String ss = "";

        if(hour <10)

        {

           sh = "0" + String.valueOf(hour);

        }else

        {

           sh = String.valueOf(hour);

        }

        if(minute <10)

        {

           sm = "0" + String.valueOf(minute);

        }else

        {

           sm = String.valueOf(minute);

        }

        if(second <10)

        {

           ss = "0" + String.valueOf(second);

        }else

        {

           ss = String.valueOf(second);

        }

        return sh +":"+ sm+":" + ss;

    }



}

 

首先新建一个CounterDown类继承counterDownTimer，然后在activity中使用，并将结果显示在textView上

public class MainActivity extends Activity {



    TextView tv;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        tv=(TextView)findViewById(R.id.textView1);

        new Couterdown(30000,1000){

            @Override

            public void onTick(long millisUntilFinished) {

                tv.setText(toClock(millisUntilFinished));

                

            }

            @Override

            public String toClock(long millis) {

                return super.toClock(millis);

            }            

        }.start();

    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }



}

最终结果如图：

之前因为没解决8小时误差的问题，所以用的上面的方法，其实可以像下面这样做

ublic class MainActivity extends Activity {



    TextView tv;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        tv=(TextView)findViewById(R.id.textView1);

        new CountDownTimer(70000,1000){

            @Override

            public void onTick(long millisUntilFinished) {

                SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");//初始化Formatter的转换格式。  

                formatter.setTimeZone(TimeZone.getTimeZone("GMT+00:00"));

                String hms = formatter.format(millisUntilFinished);  

                tv.setText(hms);

                

            }



            @Override

            public void onFinish() {

                // TODO Auto-generated method stub

                

            }

        

        }.start();

    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }



}

 

不过最后都会有个小问题，就是最后一秒不会再减少，应该是counter类的参数问题，哪位大虾看到了给小弟说说解决的办法吧~~~