停止并重新启动已经运行的线程 [英] Stop and restart a already running thread

问题描述

如果我按下一个按钮，线程应该结束，这会将 isButtonPressed 设置为 true.我的问题是，如果想通过单击按钮使用 thread.start(runnable) 启动线程，我会得到以下信息:IllegalThreadStateException: Thread already start (我认为线程在中断后终止了因为循环结束了，但好像我错了).

The Thread should end if I press a button, which sets the isButtonPressed to true. My problem is, that if a want to start the thread with thread.start(runnable) by clicking the button, I get this: IllegalThreadStateException: Thread already started (I thought the thread was terminated after the break because the the loop is over, but it seems that I am wrong).

Thread thread = new Thread(runnable);
thread.start(runnable);

可运行的可运行:

    Runnable runnable = new Runnable() {
    @Override
    public void run() {
        time = 10;
        for (int i = 10; i <= 10; i--) {
            handler.post(new Runnable() {
                @Override
                public void run() {
                    txt_Time.setText(String.valueOf(time));
                }
            });

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
            }

            if (isButtonPressed) {
                break;
            }

            if (time == 0) {
                resetVisibleState();
                break;
            } else {
                time--;
            }
        }
    }
};

感谢您的帮助！

推荐答案

Java 线程不可重新启动.对于您想要实现的目标，您可以每次创建一个新线程，或者您可以查看 ExecutorService.只需创建一个单线程执行程序 (Executors.newSingleThreadExecutor)，并在每次需要运行时将可运行对象提交给它.

Java threads are not restartable. For what you are trying to achieve, you could create a new thread each time, or you could look at an ExecutorService. Just create a single threaded executor (Executors.newSingleThreadExecutor), and submit your runnable to it every time you need it to run.

ExecutorService executor = Executors.newSingleThreadExecutor();
executor.submit(runnable);

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