在Android线程池里运行代码任务实例

        ...
    }
    ...
}

 

要中断线程，调用Thread.interrupt()就可以了。提示:线程对象是系统控制的，可以在你的app进程外被编辑。因为这个原因，你需要在中断它前加访问锁，放到一个同步块里：

复制代码
public class PhotoManager {
    public static void cancelAll() {
        /*
         * Creates an array of Runnables that's the same size as the
         * thread pool work queue
         */
        Runnable[] runnableArray = new Runnable[mDecodeWorkQueue.size()];
        // Populates the array with the Runnables in the queue
        mDecodeWorkQueue.toArray(runnableArray);
        // Stores the array length in order to iterate over the array
        int len = runnableArray.length;
        /*
         * Iterates over the array of Runnables and interrupts each one's Thread.
         */
        synchronized (sInstance) {
            // Iterates over the array of tasks
            for (int runnableIndex = 0; runnableIndex < len; runnableIndex++) {
                // Gets the current thread
                Thread thread = runnableArray[taskArrayIndex].mThread;
                // if the Thread exists, post an interrupt to it
                if (null != thread) {
                    thread.interrupt();
                }
            }
        }
    }
    ...
}

 

在大多数案例里，Thread.interrupt()会马上停止线程。可是，它只会停止在等待的线程，但不会中断cpu或network-intensive任务。为了避免系统变慢，你应该在开始尝试操作前测试等待中断的请求。