ThreadPoolExecutor和Android的线程优先级

debugcn 发表于 Dev

阿德夫

我想制作一个ThreadPollExecutor来执行具有给定优先级Process.setThreadPriority（int）的任务。

我该怎么办？在发送到线程轮询的每个可运行对象的开头添加对setThreadPriority的调用？我还考虑过使用这样的自定义线程工厂：

private final static class ProcessPriorityThreadFactory implements ThreadFactory {

    private final int threadPriority;

    public ProcessPriorityThreadFactory(int threadPriority) {
        super();
        this.threadPriority = threadPriority;
    }

    @Override
    public Thread newThread(Runnable r) {
        return new Thread(new PriorityChangeWrapper(r, threadPriority));
    }

    private final static class PriorityChangeWrapper implements Runnable {
        private final Runnable originalRunnable;
        private final int threadPriority;

        public PriorityChangeWrapper(Runnable originalRunnable, int threadPriority) {
            super();
            this.originalRunnable = originalRunnable;
            this.threadPriority = threadPriority;
        }

        @Override
        public void run() {
            Process.setThreadPriority(threadPriority);
            originalRunnable.run();
        }

    }

}

解决此问题的最佳方法是什么？谢谢

B队

您的问题中给出的自定义工厂是执行此操作的正确方法。出于这种原因，使用了出厂模式，因为它可以使您完全控制由所创建的所有线程ExecutorService。（例如，您也可以更改线程名称等）。

但是，工厂的实现比所需的要复杂得多，您需要做的是：

private final static class ProcessPriorityThreadFactory implements ThreadFactory {

    private final int threadPriority;

    public ProcessPriorityThreadFactory(int threadPriority) {
        this.threadPriority = threadPriority;
    }

    @Override
    public Thread newThread(Runnable r) {
        Thread thread = new Thread(r);
        thread.setPriority(threadPriority);
        return thread;
    }

}

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