JAVA & Android 等待线程池内任务全部完成后退出

 1 void shutdownAndAwaitTermination(ExecutorService pool) {
 2    pool.shutdown(); // Disable new tasks from being submitted
 3    try {
 4      // Wait a while for existing tasks to terminate
 5      if (!pool.awaitTermination(60, TimeUnit.SECONDS)) {
 6        pool.shutdownNow(); // Cancel currently executing tasks
 7        // Wait a while for tasks to respond to being cancelled
 8        if (!pool.awaitTermination(60, TimeUnit.SECONDS))
 9            System.err.println("Pool did not terminate");
10      }
11    } catch (InterruptedException ie) {
12      // (Re-)Cancel if current thread also interrupted
13      pool.shutdownNow();
14      // Preserve interrupt status
15      Thread.currentThread().interrupt();
16    }

转自：https://stackoverflow.com/questions/36376179/executorservices-shutdown-doesnt-wait-until-all-threads-will-be-finished