由网友(侵她城夺她心)分享简介：我看到了这个问题：how运行后完成另一个线程一个线程，但它的答案是不适合我。 I saw this question: how to run one thread after complete another thread , but the answer to it is not appropriate for...

我看到了这个问题：how运行后完成另一个线程一个线程，但它的答案是不适合我。

I saw this question: how to run one thread after complete another thread , but the answer to it is not appropriate for me.

我有这样那样的java的code为Android：

I have such kind of java code for Android:

public void startTask(Runnable r)
    {
        running = true;
        Log.i(tag, "-----------start.Runnable-----------");

        Thread first = new Thread(r);
        first.start();

        Thread second = new Thread(new Runnable() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                running = false;
            }
        });
}

第一个发需要的参数与一些硬的操作，我在后台服务正在处理的Runnable 对象。所以，当我调用方法： startTask（）我将运行=真; 以prevent双重执行任务。但是，另外，我需要第一线的完整性后立即开始第二个线程设置的运行= FALSE; ，以使其他操作执行。

first Thread takes as param Runnable object with some hard operation which I am processing in background service. So, when I call method: startTask() I set running = true; to prevent double executing tasks. But, also, I need right after completeness of first thread start second thread to set running = false; to enable other operations to execute.

我如何可以等待第一个线程的完整性通过第二不冻结主线程？谢谢！

推荐答案

试试这个：

final Thread first = new Thread(r);
first.start();

Thread second = new Thread(new Runnable() {

    @Override
    public void run() {
        first.join();
        // TODO Auto-generated method stub
        running = false;
    }
});
second.start();

我改了：

添加为第一最后keyworrd 第一个线程由#join在开始第二个线程的在等待完成。 在即将开始sencond线程。 add final keyworrd for 'first' wait finish of first thread by #join at begin of second thread. start sencond thread soon.