android系統

Question

重置遞減我想在一個循環，是5秒後，計數器開始從5到0 我曾嘗試這個代碼

countDownTimer.cancel(); 
countDownTimer.start(); 

BT這不起作用重新計數運行遞減。 textview中的值不會重置。下面發佈是完整的代碼。 關心！

private void timee() { 

    for (int j = 5; j > 0; j--) { 
     countDownTimer = new MalibuCountDownTimer(5000, 1000); 
     if (j == 4) 
      countDownTimer.start(); 
     else { 
      countDownTimer.cancel(); 
      countDownTimer.start(); 
     } 
    } 
} 

// CountDownTimer class 
public class MalibuCountDownTimer extends CountDownTimer { 

    public MalibuCountDownTimer(long startTime, long interval) { 
     super(startTime, interval); 
    } 

    @Override 
    public void onFinish() { 
     Toast.makeText(getApplicationContext(), "Done", Toast.LENGTH_SHORT).show(); 
     // takeImage(); 
    } 

    @Override 
    public void onTick(long millisUntilFinished) { 
     tt.setText("Time remain:" + millisUntilFinished/1000); 
    } 
} 

Answer 1

更換你timee（）方法和CountDownTimer類下面的代碼

private void timee(){ 

     MalibuCountDownTimer countDownTimer=new MalibuCountDownTimer(5000, 1000); 
      countDownTimer.start(); 

} 
public class MalibuCountDownTimer extends CountDownTimer { 

    public MalibuCountDownTimer(long startTime, long interval) { 
     super(startTime, interval); 
    } 

    @Override 
    public void onFinish() { 
     Toast.makeText(getApplicationContext(), "Done", Toast.LENGTH_SHORT).show(); 
     j++; 
     if(j<=5) 
     start(); 
    } 

    @Override 
    public void onTick(long millisUntilFinished) { 
     m_tv_emp.setText("Time remain:" + millisUntilFinished/1000); 
    } 
} 

注：取J所示類varieble