系统服务器和应用程序permisions [英] System server and application permisions

问题描述

我已经写在Android框架系统服务器/服务。据我知道它有系统级权限。但是，当我使用一个应用程序调用这个服务，我得到的应用程序调用该服务的权限。任何人都可以解释这种现象？此外，我怎么能解决这个问题？

I have written a system server/service in android framework. As far as i know it has the system level permissions. But when i call this service using an app i get the permissions of application calling that service. Could anyone explain this behaviour? Also how could i resolve this?

推荐答案

当你的服务，你尝试从其他服务调用的方法，尽量把调用的code为以下code座：

When in your service you try to call method from other service, try to put the code of call into the following code block:

long token = Binder.clearCallingIdentity();
//your call
Binder.restoreCallingIdentity(token);

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