java - 在android中重置递减计数器

Question

我试图在循环中运行递减计数器，5 秒后计数器再次从 5 开始计数到 ​​0。我已经尝试过这段代码

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

但这不起作用。 textview 中的值不会重置。下面发布的是完整的代码。问候!

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

用以下代码替换 timee() 方法和 CountDownTimer 类

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);
    }
}

注意:将j作为类变量