Android服务占用大量内存

该问题很可能是Android如何处理在同一应用程序进程中运行的服务和活动的结果：

只要一个（启动的）服务在流程中运行，整个流程的“内存优先级”就会提高到仅在运行（后台）活动的其他流程之上。

However, since Activities are never recycled by Android even under memory pressure (contrary to some statements in the official docs), this effectively keeps your Activity alive much longer than necessary. This is essentially a shortcoming of Android's process model.

If your memory usage drops to a few megabytes after you force-kill your application process (and Android subsequently relaunches your Service), or if the memory usage is different depending on whether you leave your activity by pressing the home or back button, this confirms that you are facing this problem.

如果您真的依赖于您的服务在后台连续运行，并且希望最大程度地减少内存使用量，则可以尝试将其移到自己的进程中（在该进程中将永远不会加载占用大量内存的UI资源，例如“活动视图”）。

当然，这也会增加开销。仅按原样保持实现可能会更好。Android仍然会在内存压力下终止您的进程，并且稍后会重新启动您的服务（但不会重新启动您的活动），这将最大程度地减少您的内存使用量，而无需任何干预。