问我想让一个倒计时计时器在android中做一个连续的循环-需要如何做的意见

EN

cdt = new CountDownTimer(60000,1000) {
    public void onTick(long millisUntilFinished) { 
        tvTimer.setText("remaining : " + millisUntilFinished/1000 + " secs");
    }
     public void onFinish() { 
       tvTimer.setText("");
       bell.start(); 
     }
 };

 /***************On Click/Touch Listeners*******************/
 btnNext.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
        tvTimer.setText("");
        btnStart.setText("Start Timer");
        SetImageView2(myDbHelper); 
        cdt.cancel(); 

       }
    });

    btnStart.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
        if (!TimerTicking){ 
          cdt.start();
          btnStart.setText("Stop Timer");
        }
        else { 
            tvTimer.setText("");
            cdt.cancel();
            btnStart.setText("Start Timer");

        }
       }
    });