Android线程池管理

/**
 * 线程管理
 *
 * @author melon.wang
 */
public class ThreadManager {
    /**
     * 核心线程数
     */
    private static final int CORE_POLL_SIZE = getDefaultThreadPoolSize();
    /**
     * 最大线程数
     */
    private static final int MAX_POOL_SIZE = CORE_POLL_SIZE * 50;
    /**
     * 非核心线程最长存活时间
     */
    private static final int KEEP_ALIVE_TIME_IN_SECONDS = 30;

    private static ThreadFactory threadFactory = new ThreadFactory() {
        private AtomicInteger count = new AtomicInteger(1);

        @Override
        public Thread newThread(Runnable r) {
            Thread thread = new Thread(r);
            thread.setName("Melon-Pool-".concat(String.valueOf(count.getAndIncrement())));
            return thread;
        }
    };

    private static ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(CORE_POLL_SIZE, MAX_POOL_SIZE, KEEP_ALIVE_TIME_IN_SECONDS, TimeUnit.SECONDS, new SynchronousQueue<Runnable>(), threadFactory);

    private ThreadManager() {
    }

    /**
     * 执行线程任务
     */
    public static void execute(Runnable runnable) {
        threadPoolExecutor.execute(runnable);
    }

    /**
     * 取消线程任务
     */
    public static void cancel(Runnable runnable) {
        if (threadPoolExecutor != null && !threadPoolExecutor.isShutdown() && !threadPoolExecutor.isTerminated()) {
            // 移除
            threadPoolExecutor.remove(runnable);
        }
    }

    /**
     * 取消所有线程任务
     */
    public static void close() {
        if (threadPoolExecutor != null && !threadPoolExecutor.isShutdown()) {
            // 移除
            threadPoolExecutor.shutdown();
        }
    }

    /**
     * 默认线程池线程个数
     */
    private static int getDefaultThreadPoolSize() {
        return Runtime.getRuntime().availableProcessors();
    }

}