Android仿活动时分秒倒计时效果

public class MainActivity extends Activity {
 private TextView tvtime1,tvtime2,tvtime3;
 private long time=400;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  tvtime1=(TextView)findViewById(R.id.tvtime1);
  tvtime2=(TextView) findViewById(R.id.tvtime2);
  tvtime3=(TextView) findViewById(R.id.tvtime3);
  handler.postDelayed(runnable, 1000); 
 }


 Handler handler = new Handler(); 
 Runnable runnable = new Runnable() { 
  @Override 
  public void run() { 
   time--; 
   String formatLOngToTimeStr= formatLongToTimeStr(time);
   String[] split = formatLongToTimeStr.split("：");
   for (int i = 0; i 0){
    handler.postDelayed(this, 1000); 
   }
  } 
 }; 

 public String formatLongToTimeStr(Long l) {  
   int hour = 0;  
   int minute = 0;  
   int secOnd= 0;  
   secOnd= l.intValue() ;  
   if (second > 60) {   
   minute = second / 60;   //取整 
   secOnd= second % 60;   //取余
   }  

   if (minute > 60) {   
   hour = minute / 60;   
   minute = minute % 60;  
   }  
   String strtime = hour+"："+minute+"："+second;
   return strtime; 

 }

}