AsynchronousBackgroundHandler.java 文件源码

@Override
public int runWithDelay(@NonNull final Runnable runnable, @IntRange(from = 0) long delayInMillis) {
    final int taskId = getTaskId(scheduledTasks);

    CountDownTimer scheduledTask = new CountDownTimer(delayInMillis, delayInMillis) {

        @Override
        public void onTick(long l) {
            // do nothing (is disabled anyway because "countDownInterval" is set to "millisInFuture")
        }

        @Override
        public void onFinish() {
            scheduledTasks.remove(taskId);
            runnable.run();
        }
    }.start();

    scheduledTasks.put(taskId, scheduledTask);

    return taskId;
}