java - Android 通过点击按钮停止循环

Question

我正在尝试制作一个按钮，当单击它时，它会更改其颜色图像并在方法 activeDelay() 中启动倒计时器，如下所示:

 piscaAutoButton = (Button) rootView.findViewById(R.id.piscaAutoButton);
        piscaAutoButton.setOnClickListener(new Button.OnClickListener() {
            @Override
            public void onClick(final View view) {
                if (sessionManager.getPisca()) {
                    sessionManager.setPisca(false);
                    trigger = false;
                    piscaAutoButton.setBackgroundResource(R.drawable.button_bg_round);
                } else {
                    sessionManager.setPisca(true);
                    piscaAutoButton.setBackgroundResource(R.drawable.button_add_round);
                    trigger = true;
                    activeDelay(trigger);

                }

这是我的 activeDelay 方法:

private boolean activeDelay(boolean trigger) {
        while (trigger) {        // LOOP WHILE BUTTON IS TRUE CLICKED
            int timerDelay = manualControl.getDelayPisca(); //input for timer
            //delay manual
            new CountDownTimer(timerDelay * 1000, 1000) {
                public void onFinish() {
                    System.out.println("sent");
                    try {
                        System.out.println("blink button " + manualControl.getBlinkButton());
                        if (!manualControl.getBlinkButton().isEmpty()) {
                            MenuActivity.mOut.write(manualControl.getBlinkButton().getBytes());
                        }

                    } catch (IOException e) {
                        e.printStackTrace();

                    }
                }

                public void onTick(long millisUntilFinished) {

                }

            }.start();

        }
        return trigger;
    }

我的问题是我需要计数器在完成后继续运行，当用户再次单击按钮时停止(trigger = false)。我在编程时遇到问题，如果有人可以帮忙，我知道 activeDelay 内的返回会从方法中弹出，我们该如何解决这个问题，tks

Answer 1

我建议您不要使用 CountDownTimer(这会在某个特定时间段内运行)，而应该使用 Handler(这会无限运行)。我正在向您发送处理程序代码。

  private Handler handler = new Handler();

  //call this when you want to start the timer .
  handler.postDelayed(runnable, startTime);


    Runnable runnable = new Runnable() {
    @Override
    public void run() {
        // Do here , whatever you want to do(show updated time e.t.c.) .
        handler.postDelayed(this, xyz);  //xyz is time interval(in your case it is 1000)
    }
};

    //Stop handler when you want(In your case , when user click the button)
    handler.removeCallbacks(runnable);