android 代码片段，实现60秒倒计时

public class TimeUtils {
private int time=60;

private Timer timer;

private Button btnSure;

private String btnText;

public TimeUtils(Button btnSure, String btnText) {
super();
this.btnSure = btnSure;
this.btnText = btnText;
}





public void RunTimer(){
timer=new Timer();
TimerTask task=new TimerTask() {

@Override
public void run(){
time--;
Message msg=handler.obtainMessage();
msg.what=1;
handler.sendMessage(msg);

}
};


timer.schedule(task, 100, 1000);
}


private Handler handler =new Handler(){
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 1:

if(time>0){
btnSure.setEnabled(false);
btnSure.setText(time+"秒后重新发送");
btnSure.setTextSize(14);
}else{

timer.cancel();
btnSure.setText(btnText);
btnSure.setEnabled(true);
btnSure.setTextSize(14);
}

break;


default:
break;
}

};
};



}