Android中一种ThreadPool的实现

可以简单的将任务在UI线程或者非UI线程中执行。

代码如下：（可以看作精简版的AsyncTask）

public class ThreadPool {    private static final int CORE_POOL_SIZE = 5;    private static final int MAXIMUM_POOL_SIZE = 128;    private static final int KEEP_ALIVE = 1;    private static final ThreadFactory sThreadFactory = new ThreadFactory() {        private final AtomicInteger mCount = new AtomicInteger(1);        public Thread newThread(Runnable r) {            return new Thread(r, "AsyncTask #" + mCount.getAndIncrement());        }    };    private static final BlockingQueue sPoolWorkQueue = new LinkedBlockingQueue(            10);    private static Handler sUIHandler = new Handler(Looper.getMainLooper());    private static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(CORE_POOL_SIZE,            MAXIMUM_POOL_SIZE, KEEP_ALIVE, TimeUnit.SECONDS, sPoolWorkQueue, sThreadFactory);    public static void runOnPool(Runnable command) {        THREAD_POOL_EXECUTOR.execute(command);    }    public static void runOnUI(Runnable command) {        sUIHandler.post(command);    }    public static void postUiDelay(Runnable command, long delayMillis) {        sUIHandler.postDelayed(command, delayMillis);    }}

在代码的任何位置，你只要想在异步线程中执行一段代码:

ThreadPool.runOnPool(new Runnable(){...});

在任何线程中，你想在UI线程中执行一个更新：

ThreadPool.runOnUI(new Runnable(){...});

这会让你的代码实现异步加载然后更新UI布局变得非常简单。

例如：

ThreadPool.runOnPool(new Runnable(){

void run(){

loadData();//后台操作

ThreadPool.runOnUI(new Runnable(){

refreshUI();//更新界面

};

)

}

});

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