倒计时

Handler与Runnable（最简单型）
 

publicclass timerTask extends Activity{

 private int recLen = 10;
 private TextView txtView;
 
 public void onCreate(BundlesavedInstanceState){
super. onCreate(savedInstanceState);
 setContentView(R. layout. timertask);
 txtView = (TextView)findViewById(R. id. txttime);

  handler. postDelayed(runnable, 1000);
 }

 Handler handler = new Handler();
  Runnable runnable = new Runnable() {
  @Override
  public void run() {
 recLen--;
  txtView. setText("" + recLen);
 handler. postDelayed(this, 1000);
  }
  };
}